FIXED

G A PO
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OR

PC9E-0341

Portable & Fixed Products

General Catalog

We are committed to providing products that brighten the
future of the environment for both people and industry.

Non-Stop

To avoid halting field operations

Portable Gas Detectors 

As a leader in this field, Riken Keiki continually strives in its development andMulti gas detectors

manufacture of industrial gas detection equipment.

Single-component gas detectors

3

Safety and peace of mind in today’s society cannot be taken for granted.
Various huge infrastructures vital to the comfort and convenience of urban life aresupported by resilient systems to ensure their safety and functionality.
Similarly, in the diverse industrial fields that support social development andDon’t Stopeconomic prosperity, thoroughgoing measures are required to safeguard people

Fixed Gas Monitoring
Systems

To avoid halting the future of research21

Detectors
Alarm units

and the environment from the hazards and risks that may arise.

Analyzers
MiscellaneousGas Hazards 

One Stop

Next Step

Realizing environments in which people can work with peace ofElectronics
1

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuildingmind

We take our responsibilities very seriously,
across R&D, manufacture, and maintenance—

53

What are combustible gases? 

53

What are toxic gases? 

54

Carbon monoxide (CO) 

54

Detection target toxic gas list 55

What are anoxia and hydrogen sulfide
poisoning? 

56

The importance of maintenance 

56

Related Laws and Regulations (JAPAN) 

57

Explanation of Explosion-Proof
Construction 

60

Detection Principle List 61

To avoid halting the future of research

Introducing products needed for diverse work environments

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry
2

PORTABLE
Portable Gas Detectors

Portable gas detector types and sampling methods to suit a wide range of measuring environments

As suggested by the name, portable gas detectors are gas detectors that can be carried or

Detectors use two different gas sampling methods.

worn by workers. Unlike stationary fixed gas detectors, portable gas detectors measure andOne is pump suction. The detector uses the suction force of its internal pump for a wide range of applications, including identifying leakage

detect hazards of specific locations such as the area surrounding moving workers. These

locations and checking for potential gas hazards before working inside manholes or tanks. The other is diffusion. This method eliminates thedetectors help prevent all kinds of gas-related accidents by detecting at an early stage leaks

internal pump and makes it possible to make smaller and lighter units suited for real-time safety monitoring in areas surrounding workers.

of combustible gases that can build up in the air leading to explosions or leaks of toxic

The present mainstream is multi gas detectors, which can simultaneously detect multiple gas types such as oxygen and the hazardous gases

gases hazardous to human health, as well as by helping control the concentration of oxygen,described above and display corresponding concentrations at the same time. Naturally, Riken Keiki offers an extensive range of multi gas

essential to human life.

detectors.

CONTENTS

Multi Gas Detectors

Multi Gas Detectors

Portable Gas Detector GX-3R 

5Portable Gas Detector GX-3R Pro 

6

Portable Multi Gas Detector GX-Force 

7

Portable Multi Gas Detector GX-6000 

9Portable Multi Gas Detector GX-2012/GX-2012GT 

10Portable Gas Detector GX-8000 

11Portable Gas Detector RX-8000/RX-8500/RX-8700 

12Single-Component Gas Detectors Portable Gas Detector 04 Series* 

13Portable Gas Detector GP-03 

13

Portable Gas Detector GW-3 Series* 

14Portable Combustible Gas Detector GP-1000 to prevent explosion 

15

Portable Combustible Gas Detector NC-1000 for low concentrations 

15

Portable Combustible Gas Detector NP-1000 for high concentrations 

15

Portable Gas Detector for Combustible Gas Measurement GX-8000 (TYPE LEL) 

16

Portable Gas Detector for Oxygen Concentration Measurement GX-8000 (TYPE O2) 

17

Portable Gas Detector SC-8000 

17

Optical Interferometric Gas Monitor FI-8000 

18

Portable Gas Leak Detector SP-220 TYPE M for city gas19

Portable Gas Leak Detector SP-220 TYPE L for LPG19

Portable Gas Leak Detector SP-220 TYPE ML for city gas/LPG

19

Portable Gas Leak Detector SP-220 TYPE F for fluorocarbon gas19

Portable Gas Leak Detector SP-220 TYPE H2 for hydrogen gas19

Portable Gas Leak Detector SP-220 TYPE FUM for fumigation gas19

Portable Gas Leak Detector SP-220 TYPE SC for semiconductor material gas19

Formaldehyde Gas Detector FP-31 

20* Supports two-component gas detection with certain models.

Diffusion type

Pump suction type

P. 5

P. 7

P. 9

P. 10

GX-Force

GX-6000

GX-2012

P. 10

P. 6

GX-3R

GX-2012GT

GX-3R Pro
P. 12

P. 11

P. 14

P. 13

GX-8000

RX-8000
P. 12

GW-3 (CX)

P. 12

CX-04

RX-8500

RX-8700

Single-Component Gas Detectors
Diffusion type
P. 14

Pump suction type
P. 13

GW-3 (O2)
GW-3 (OX)
GW-3 (CO)GW-3 (C-)
GW-3 (HS)OX-04
OX-04G
CO-04
CO-04 (C-)
HS-04
SC-04

P. 17

P. 16

GX-8000 (TYPE O2)

GX-8000 (TYPE LEL)

P. 17

P. 18

FI-8000

P. 20
P. 19

FP-31

SC-8000

TYPE M
TYPE LTYPE MLTYPE F
TYPE H2
TYPE FUM
TYPE SC

SP-220

P. 13

P. 15

GP-03

3

GP-1000
NC-1000
NP-1000
4

Active in all fields. Compact design won’t interfere with work.

Bluetooth-capable high-spec 5-component detector

Main areas of use

GX-3R

Electronics

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Detection target gases
4 components

Main areas of use

Portable Gas Detector
Oil refining and petrochemicals

GX-3R Pro

OxygenCarbon monoxide

Steel plants

Shipping and shipbuilding

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Carbon monoxide

Hydrogen sulfide

Carbon dioxide, sulfur dioxide, nitrogen dioxide, hydrogen cyanide,

Single-Component Gas Detectors

Single-Component Gas Detectors

Explosion-proof• One of the world’s smallest, lightest portable four-component gas detectors

Features• Can be worn within breathing zone.

Non-explosion-proof• Bluetooth-capable gas detector

Combustible Gas Detectors• Operates on either rechargeable or dry batteries.

equivalent to IP66/68)• Dust-proof, waterproof construction for peace of mind when working outdoors (protection level

EN 60079-29-1 (combustible gas), EN 50104 (oxygen)
EN 45544-1, EN 45544-2, EN 45544-3 (toxic gas)equivalent to IP66/68)

Complies with MED (European Marine Equipment Directive).
JG (Ministry of Land, Infrastructure, Transport and Tourism) type approved

EN 60079-29-1 (combustible gas), EN 50104 (oxygen)
EN 45544-1, EN 45544-2, EN 45544-3 (toxic gas)

EN

Complies with JIS T 8201:2010 Oxygen deficiency indicator.
Complies with JIS T 8205:2018 Hydrogen sulfide indicator/alarm.

MarineComplies with MED (European Marine Equipment Directive).
JG (Ministry of Land, Infrastructure, Transport and Tourism) type approved
Oxygen Monitors

Oxygen Monitors

Complies with JIS T 8201:2010 Oxygen deficiency indicator.
Complies with JIS T 8205:2018 Hydrogen sulfide indicator/alarm.

JISSpecifications
Model

GX-3R

Sampling method

Model

Alarm typeGas alarm, fault alarm

Alarm pattern

Lamp flashing, continuous modulating buzzer sounding, gas concentration readout blinking, vibration
LCD digital (7-segment), backlight

Explosion-proof
construction

Flame-proof enclosure + intrinsically safe explosion-proof construction

Protection level

Equivalent to IP66/68 (2 m, 1 h)

Certifications

IECEx, ATEX, Brazil Ex, Japan Ex, MED, JG, CE marking, JIS

Power source* Photograph shows model with protective cover fitted.

Lithium ion rechargeable battery
Long-life battery mode on: Approx. 40 hours (25 °C, fully charged, no alarm, no lighting)Long-life battery mode off: Approx. 25 hours (25 °C, fully charged, no alarm, no lighting)External dimensions

2-component type1-component typeHC or CH4/O2/H2S/COTYPE BHC or CH4/O2/H2S

TYPE CHC or CH4/O2/COTYPE CH*

HC or CH4/O2/COTYPE D

HC or CH4/O2

Approx. 100 g

Power source

TYPE EO2/H2STYPE F

O2/CO

TYPE FH*

O2/CO

TYPE I

HC or CH4/CO

TYPE IH*

HC or CH4/CO

TYPE K

H2S* Reduced H2 interference CO sensor

Combustible gas(HC or CH4)-40 - +60 °C (no sudden fluctuations)Long-life battery mode on: Approx. 40 hours (25 °C, fully charged, no alarm, no lighting)Long-life battery mode off: Approx. 25 hours (25 °C, fully charged, no alarm, no lighting)0 - 95 %RH (no condensation)

External dimensions

With rechargeable battery unit: Approx. 73 mm (W) × 65 mm (H) × 26 mm (D) (excluding projections)With dry battery unit: Approx. 73 mm (W) × 65 mm (H) × 34 mm (D) (excluding projections)

Oxygen (O2)

Carbon monoxide (CO)• Bluetooth capability

WeightCan communicate with smartphones and tablets via Bluetooth.
Through a dedicated app, emergency alerts can be shared withremote locations in real time.

Operating temperature
range*2, *3-40 - +60 °C (no sudden fluctuations)Operating humidity
range*3

0 - 95 %RH (no condensation)

Wireless specifications

Bluetooth 4.2 (Bluetooth Low Energy)

New ceramic type0 - 100 %LEL

0.0 - 40.0 vol%0 - 2,000 ppm

0.0 - 200.0 ppm

Detection range

0 - 100 %LEL

0.0 - 25.0 vol%0 - 500 ppm

0.0 - 100.0 ppm

Alarm setpoints(Can be set by user.)Approx. 120 g (with rechargeable battery unit), approx. 140 g (with dry battery unit)*1: Varies depending on sensor type installed. Please contact Riken Keiki for more information.
*2: HCN: -20 - +60 °C (no sudden fluctuations)*3: In temporary ambient conditions for approximately 15 minutes. The operating temperature and humidity ranges for continuous ambientconditions are as follows:
Temperature: -20 - +50 °C (no sudden fluctuations) / Humidity: 10 - 90 %RH (no condensation)

Hydrogen sulfide (H2S)

Detection principle

Electrochemical type

1 %LEL
10 %LEL
25 %LEL
50 %LEL
100 %LEL

Lithium ion rechargeable battery unit or dry battery unit (AAA alkaline batteries × 2)

Continuous operatingtime*1

Display range

1st
2nd
3rd
OVER

Flame-proof enclosure + intrinsically safe explosion-proof construction
Equivalent to IP66/68 (2 m, 1 h)

Detection target gas

1 digit

Explosion-proof
construction

0.1 vol%
L
LL
H
OVER

19.5 vol%18.0 vol%23.5 vol%40.0 vol%

1 ppm
1st
2nd
3rd
TWA
STEL
OVER

25 ppm50 ppm
1,200 ppm
25 ppm200 ppm
2,000 ppm

0.1 ppm
1st
2nd
3rd
TWA
STEL
OVER

5.0 ppm
30.0 ppm
100.0 ppm
1.0 ppm
5.0 ppm
200.0 ppm

Monitors

Monitors

3-component type

TYPE A

Japanese, English, French, Spanish, Portuguese, German, Italian, Russian, Korean,Chinese (simplified), Chinese (traditional)

Concentration Meters

Concentration Meters
4-component type

LCD digital (full-dot matrix), backlight

Display languages

IECEx, ATEX, Brazil Ex, Japan Ex, MED, JG, CE marking, JIS

Detection target gas list
Detection target gas

Lamp flashing, continuous modulating buzzer sounding, gas concentration readout blinking, vibration

Certifications

Bluetooth® and the logo are
registered trademarks of Bluetooth SIG, Inc.

TYPE

Gas alarm, fault alarm Optional: panic alarm and man down alarm

Alarm pattern

Approx. 58 mm (W) × 65 mm (H) × 26 mm (D) (excluding projections)*1: Varies depending on sensor type installed. Please contact Riken Keiki for more information.
*2: In temporary ambient conditions for approximately 15 minutes. The operating temperature and humidity ranges for continuous ambientconditions are as follows:
Temperature: -20 - +50 °C (no sudden fluctuations) / Humidity: 10 - 90 %RH (no condensation)

Type list

Alarm typeProtection level

WeightOperating humidity
range*2

Diffusion type (Also supports suction type if the pump unit is attached.)

Display

Continuous operatingtime*1

Operating temperature
range*2

GX-3R Pro

Sampling method

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors* Photograph shows model with protective cover fitted.

Specifications

Diffusion type (Also supports suction type if the pump unit is attached.)

Display

Combustible Gas Detectors• Incorporates high-performance new R sensor with three-year sensor warranty.

• Dust-proof, waterproof construction for peace of mind when working outdoors (protection level

JIS

Oxygen* Up to five components can be detected with the CO & H2S dual sensor installed.

Non-explosion-proof

Explosion-proof

MarineThe detection target gases will vary depending on the particular model (sensors installed).

Combustible gas

Additional one component can be selected from
phosphine, and ammonia

Features

EN

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

4 components +1 component

Hydrogen sulfide• Incorporates high-performance new R sensor with five-year sensor warranty (optional).

5

Construction sites

Firefighting and rescue

Detection target gases

Explosion-proof
Explosion-proof

Oil refining and petrochemicals

Miscellaneous

The detection target gases will vary depending on the particular model (sensors installed).

Combustible gas

Electronics

Multi gas detectors

Multi Gas Detectors

Portable Gas Detector

Detection target gas list
Oxygen(O2)

Carbon monoxide(CO)Hydrogen sulfide(H2S)

0 - 100 %LEL

0.0 - 40.0 vol%0 - 2,000 ppm

0.0 - 200.0 ppm

0 - 100 %LEL

0.0 - 25.0 vol%0 - 500 ppm

1 %LEL0.1 vol%

Detection target
gas

Combustible gas(HC or CH4)

Detection
principle

New ceramictype

Display range
Detection range
1 digit

Alarm setpoints(Can be set byuser.)

1st
10 %LEL
25 %LEL
2nd
3rd
50 %LELOVER 100 %LEL

Sulfur dioxide(SO2)

Nitrogen dioxide(NO2)Hydrogen cyanide(HCN)

Phosphine(PH3)

Ammonia(NH3)

0.00 - 100.00 ppm 0.00 - 20.00 ppm

0.0 - 30.0 ppm

0.00 - 20.00 ppm

0.0 - 400.0 ppm

0.00 - 10.00 vol%0 - 10,000 ppm

0.0 - 100.0 ppm

0.00 - 20.00 ppm

0.00 - 20.00 ppm

0.0 - 30.0 ppm

0.00 - 20.00 ppm

0.0 - 300.0 ppm

0.00 - 5.00 vol%0 - 10,000 ppm

1 ppm

0.1 ppm

0.05 ppm

0.05 ppm

0.1 ppm

0.01 ppm

0.5 ppm

0.01 vol%20 ppm25 ppm1st
50 ppm2nd
3rd 1,200 ppm
25 ppmTWA
STEL 200 ppm
OVER 2,000 ppm

1st
5.0 ppm
2nd 30.0 ppm
3rd 100.0 ppm
1.0 ppm
TWA
STEL 5.0 ppm
OVER 200.0 ppm

1st
2.00 ppm
2nd 5.00 ppm
3rd 100.00 ppm
TWA 2.00 ppm
STEL 5.00 ppm
OVER100.00 ppm

1st
2.00 ppm
2nd 4.00 ppm
3rd 20.00 ppm
TWA 0.50 ppm
STEL 1.00 ppm
OVER 20.00 ppm

1st
0.30 ppm
2nd 0.60 ppm
1.00 ppm
3rd
TWA 0.30 ppm
STEL 1.00 ppm
OVER 20.00 ppm

1st
25.0 ppm
2nd 35.0 ppm
35.0 ppm
3rd
TWA 25.0 ppm
STEL 35.0 ppm
OVER 400.0 ppm

1st
0.50 vol%2nd 3.00 vol%3rd 3.00 vol%
TWA 0.50 vol%STEL 3.00 vol%OVER 10.00 vol%1st 5,000 ppm
2nd 5,000 ppm
3rd 5,000 ppm
TWA 5,000 ppm
OVER10,000 ppm

Electrochemical type

L
LL
H
OVER

19.5 vol%18.0 vol%23.5 vol%40.0 vol%Carbon dioxide (CO2)
Infrared type

1st
2nd
3rd
TWA
STEL
OVER

10.0 ppm
20.0 ppm
30.0 ppm
0.9 ppm
4.5 ppm
30.0 ppm

6

Suction-type four-component gas detector with 30 hours of battery runtime
Portable Multi Gas Detector• Wide range of safety functions

Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Eliminates the need for troublesome calculations. Allows direct readout of 27 different combustible gas types. * The setting is retained even after the power is turned off and on again.

Combustible gases conversion list
Gas type

Detection target gases

The detection target gases will vary depending on the particular model (sensors installed).

Conversion from CH4 Conversion from HC
specifications
specifications

Gas type

Conversion from CH4 Conversion from HC
specifications
specifications

Gas type

Conversion from CH4 Conversion from HC
specifications
specifications−

×

Acetone〇〇N-nonane〇〇−

Propane〇×

Ethyl acetate〇〇

Explosion-proof

Hydrogen〇〇

Butadiene〇〇

Isopropyl alcohol〇〇

Methanol〇〇Cyclopentane〇〇

Methyl ethyl ketone〇〇

Explosion-proof

Acetylene〇〇

Benzene〇〇

Methyl methacrylate〇〇

Ethylene〇〇N-hexane〇〇

Dimethyl ether〇〇

Ethane〇×

Toluene〇〇

Methyl isobutyl ketone〇〇• Approx. 300 g lightweight easy-to-grip design

Ethanol〇〇N-heptane〇〇

Tetrahydrofuran〇〇• Three-year sensor warranty

Propylene〇〇

Xylene〇〇Normal pentane〇〇

Combustible gas

OxygenCarbon monoxide

Hydrogen sulfide

Single-Component Gas Detectors

Non-explosion-proof

Features• Continuous operating time: Approx. 30 hours• Intrinsically safe explosion-proof construction, flame-proof enclosure• Protection rating equivalent to IP67

Complies with JIS T 8201:2010 Oxygen deficiency indicator.
Complies with JIS T 8205:2018 Hydrogen sulfide indicator/alarm.
Complies with JIS T 8206:2020 Flammable gas detectors.

JIS

Confirmation beep function

Calibration notification function

Settings can be changed/configured on the GX-Force main
unit. Supports management and operation in accordancewith the customer’s own criteria.

Indicates that the product is functioning normally. The buzzer
sounds at preset intervals while measurement is underway.

Indicates the number of days until recommended regular
maintenance when the power is turned on. Reminds the user
to perform maintenance to ensure safe use.

• Incorporating new R Sensor for outstanding long-term stability

Specifications
GX-Force
Pump suction type (Minimum suction flow rate: 0.35 L/min (open flow rate))
Gas alarm, fault alarm
Lamp flashing, continuous modulating buzzer sounding, gas concentration readout blinking, vibration
LCD digital (7-segment + 14-segment + icons) with backlight
Maximum storage capacity: 3,600 items Interval: 5 minutes (adjustable)

The GX-Force incorporates/utilizes the
newly developed R Sensor sensor series.
The R Sensor features dramatically
improved performance over conventional
sensors.
The sensors are covered by a three-year
warranty* for peace of mind.
* Assumes the product is inspected at least once a
year.

O2

CO & H2S

COTough construction with excellent
toxicity and impact resistanceElectrochemical type withgreatly improved basic
characteristics

2-in-1 dual construction
for compact main unit

Two-sensor configuration
minimizes H2 interference

USB 2.0 (for data logger) * Connector: Type-C
Flame-proof enclosure + intrinsically safe explosion-proof construction• Extensive range of optional items

Ex da ia II C T4 Ga/Ex ia II C T4 Ga
IP67 equivalent

The optimal combination can be selected to suit requirements.

IECEx, ATEX, Japan Ex, CE marking, JIS
Lithium ion rechargeable battery

Can be fitted in place of the tapered nozzle provided to allow readings to be checked even from a distance.

Approx. 30 hours (25 °C, fully charged, no alarm, no lighting)Approx. 64 mm (W) × 173 mm (H) × 47 mm (D) (excluding projections)
Approx. 300 g

Retracted
Approx.
40 cm-40 - +60 °C (no sudden fluctuations)
0 - 95 %RH (no condensation)

ExtendedApprox.
70 cm

Type list
Detection target gas/
SensorHC or CH4
NCR-6309

TYPE

〇

〇

3-component type

TYPE B〇〇

3-component type

TYPE C〇〇

3-component type

TYPE CH〇〇

2-component type

TYPE D〇〇

H2S
ESR-A13i

CO
ESR-A13P

Reduced H2interference
CO
ESR-A1CP〇〇

Monitors

Combustible gas(HC or CH4)

Detection principle

New ceramic type

Display range

0 - 100 %LEL

0.0 - 40.0 vol%0 - 2,000 ppm

0.0 - 200.0 ppm

Detection range

0 - 100 %LEL

0.0 - 25.0 vol%0 - 500 ppm

0.0 - 100.0 ppm

1 %LEL0.1 vol%

1 ppm

Alarm setpoints(Can be set by user.)

10 %LEL
25 %LEL
50 %LEL
100 %LEL

Oxygen (O2)

Carbon monoxide (CO)Hydrogen sulfide (H2S)

Electrochemical type

L
LL
H
OVER

(Tube length: approx. 8 m)

(Gas sampling tube length: approx. 75 cm)

Part No.: 4383 0730 80

Part No.: 4384 0430 60

Part No.: Gas sampling rod: 0904 0275 00
Gas sampling tube: 0914 0100 00

For measurements in specific locations within reach〇

Detection target gas

1st
2nd
3rd
OVER

Gas sampling rod and Gas sampling tube

For measurements in high locations
Two-stage sampling rod〇

Detection target gas list

Resolution

For measurements inside tanks
Float-type gas collector

Monitors

TYPE A

4-component type

H2S & COESR-A1DPO2
ESR-X13P

19.5 vol%18.0 vol%23.5 vol%40.0 vol%

1st
2nd
3rd
TWA
STEL
OVER

25 ppm50 ppm
1,200 ppm
25 ppm200 ppm
2,000 ppm

Concentration Meters

Concentration Meters*1: Varies depending on sensor type installed. Please contact Riken Keiki for more information.
*2: In temporary ambient conditions for approximately 15 minutes. The operating temperature and humidity ranges for continuous ambientconditions are as follows:
Temperature: -20 °C - +50 °C (no sudden fluctuations) / Humidity: 10 - 90 %RH (no condensation)*3: The operating temperature range in which explosion-proof performance is maintained is as follows:
Temperature: -20 °C - +60 °C (no sudden fluctuations)Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Combustible gas

Oxygen Monitors

Oxygen Monitors

Model
Sampling method
Alarm type
Alarm activation
Display
Data logger function
Communication
specifications
Explosion-proof
construction
Explosion-proof classProtection level
Certifications
Power source
Continuous operatingtime*1
External dimensions
WeightOperating temperature
range*2, 3
Operating humidity
range*2

Alarm setpoint setting function

Combustible Gas Detectors

Combustible Gas Detectors• Survives 3 m drop testing.

〇Single-Component Gas Detectors

MethaneIsobutane

4 components

7

Combustible gas conversion function * This function is initially disabled when shipped. Change this setting to use the function.

Multi gas detectors

Multi Gas Detectors

GX-Force

Main areas of use

AC adapter

Tapered nozzle

Hand strap

Belt clip* The AC adapter is not supplied with the gas detector. A separate
arrangement is required to recharge the gas detector.

Part No.: 4126 4948 20

Part No.: 0888 0605 90* With two attachment screws

Part No.: 4711 9954 30

Part No.: 2594 1342 30

0.1 ppm
1st
2nd
3rd
TWA
STEL
OVER

5.0 ppm
30.0 ppm
100.0 ppm
1.0 ppm
5.0 ppm
200.0 ppm

Data logger management program

USB cable (Type-A - Type-C, 1 m)

Protective film (set of 5)* A separate USB cable (option) is also required to use this.

* Required when using a data logger management program (option).

Part No.: 4777 9296 50

Part No.: 9812 0020 10Part No.: 2440 2728 90

8Capable of detecting up to six different gases simultaneously with a single unit 				Main areas of use

GX-6000

Electronics
Firefighting and rescue

Construction sites

Steel plants

Shipping and shipbuilding

Laboratories and universities Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Main areas of use

Portable Multi Gas Detector

Oil refining and petrochemicals

Detection target gases

The detection target gases will vary depending on the particular model (sensors installed).

Combustible gas

OxygenCarbon monoxide

Hydrogen sulfide

VOC

Sulfur dioxide

Nitrogen dioxide

Hydrogen cyanide

Ammonia

Chlorine

Carbon dioxide

GX-2012
GX-2012GT

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Detection target gases
4 components

The detection target gases will vary depending on the particular model (sensors installed).

Combustible gas

OxygenNon-explosion-proof

Features• Supports 1 ppm hydrogen sulfide alarm setpoint (ACGIH TWA 1 ppm supported). GX-2012• Features leak check mode (combustible gas). GX-2012GT• Capable of detecting up to six different gases including VOC simultaneously with a single unit.

Marine• Three-direction alarm lamps and two-direction alarm buzzers alert both the carrier and those insurrounding areas.

• Buzzer volume of 95 dB (A) or more can be clearly heard even in noisy factory environments.
• Can be used with either a dry battery unit or a lithium ion battery unit (sold separately).

Specifications

JG (Ministry of Land, Infrastructure, Transport and Tourism) type approved

Model

GX-2012/GX-2012GT

Sampling method

Model

GX-6000

Sampling method
Alarm typeGas alarm, fault alarm, panic alarm, man down alarm (optional)

Alarm pattern

Lamp flashing, continuous modulating buzzer sounding, gas concentration readout,
alarm detail blinking, vibration*1

Galvanic cell
type

Detection range

0100 %LEL

0.0 25.0 vol%0.0 30.0 ppm

0150 ppm

Display range

0100 %LEL

0.0 40.0 vol%0.0 100.0 ppm

0500 ppm

1 digit

1 %LEL0.1 vol%

0.5 ppm

1 ppm

Intrinsically safe explosion-proof construction

External dimensions

Approx. 71 mm (W) × 173 mm (H) × 43 mm (D) (excluding projections)

WeightIECEx: Ex ia II B/II C T4/T3 Ga, ATEX: II 1G Ex ia II B/II C T4/T3 Ga

Protection level

IP67 equivalent

Certifications

IECEx, ATEX, Brazil Ex, Japan Ex, JG, CE marking

Power source

Lithium ion battery unit or dry battery unit (AA alkaline batteries × 3)

GX-2012GT

Lithium ion battery unit: Approx. 14 hours (with full charge, at 25 °C, no alarm, no lighting)
Dry battery unit: Approx. 8 hours (with new batteries, at 25 °C, no alarm, no lighting)

Detection range

VOC: 0 - 100 ppm
Benzene:0 - 50 ppm*2

Display range

050,000 ppb

06,000 ppm

VOC: 0 - 100 ppm
Benzene:0 - 50 ppm*2

1 digit

Up to 5000:
1 ppb
Over 5000:
10 ppbUp to 600.0:
0.1 ppm
Over 600:
1 ppm

Up to 10 ppm:
0.01 ppm
Over 10 ppm:
0.1 ppm

0 - 95 %RH (no condensation)*1: The alarm types (operations) vary slightly depending on the type.
*2: The continuous operating time will vary for the GX-2012GT depending on the mode used.

Approx. 70 mm (W) × 201 mm (H) × 54 mm (D) (excluding projections)-20 - +50 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)

Type list (GX-2012)

Type list (GX-2012GT)

TYPE*1: The man down alarm is normally disabled. If you need to use this feature, please contact Riken Keiki.

5-component type4-component type3-component type2-component type

Detection target gas

TYPE

TYPE A

CH4 (%LEL)/CH4 (vol%)/O2/H2S/COTYPE BHC or CH4 (%LEL)/O2/H2S/COTYPE CHC or CH4 (%LEL)/O2/H2S

TYPE D

HC or CH4 (%LEL)/O2/COTYPE E

CH4 (%LEL)/CH4 (vol%)/O2

TYPE FHC or CH4 (%LEL)/O2

5-component type4-component type3-component type

Detection target gas
TYPE A

CH4 (leak)/CH4 (%LEL)/CH4 (vol%)/O2/COTYPE BHC or CH4 (leak)/HC or CH4 (%LEL)/O2/H2S

TYPE C

CH4 (leak)/CH4 (%LEL)/CH4 (vol%)/O2

TYPE D

HC or CH4 (leak)/HC or CH4 (%LEL)/O2

Detection target gas list
Sulfur dioxide(SO2)

Nitrogendioxide(NO2)

Hydrogencyanide(HCN)

Ammonia(NH3)

Chlorine(Cl2)

Phosphine(PH3)

Combustible
gas
(HC)

Electrochemical type06,000 ppm-20 - +50 °C (no sudden fluctuations)Operating humidity
range

Approx. 500 g (with lithium ion battery unit), approx. 450 g (with dry battery unit)

Operating temperature
range

PID type
050,000 ppb

Approx. 360 g

Operating temperature
range

Carbon dioxide(CO2)

New ceramic type

Thermal conductivity type

Electrochemical type

Electrochemical typeHot-wire semiconductor type

0.0 - 25.0 vol%0 - 100 %LEL

Up to 100 vol%*3

0 - 150 ppm

0.0 - 30.0 ppm

HC: 0 - 500 ppm
CH4: 0 - 2,000 ppm

Display range

0.0 - 40.0 vol%0 - 100 %LEL/Up to 100 vol%0 - 500 ppm

0.0 - 30.0 ppm

HC: 510 - 2,000 ppm
CH4: 2,010 - 5,000 ppm

0.1 vol%

1 %LEL/1 vol%1 ppm

0.1 ppm

10 ppm

0.00 10.00 vol%010,000 ppm

0.01 ppm

1 %LEL(0.5 vol%)1 %LEL/
0.5 vol%

0.02 vol%20 ppm

0.00- 99.90 ppm

0.00- 20.00 ppm

0.0 15.0 ppm

0.0- 400.0 ppm

0.00- 10.00 ppm

0.05 ppm

0.05 ppm

0.1 ppm

0.5 ppm

0.05 ppm

0.00 10.00 vol%Hydrogen sulfide(H2S)*1

Galvanic cell type

0.0 30.0 vol%*3

0.00- 20.00 ppm

Carbon monoxide (CO)

Detectionrange

0 - 100 %LEL/
100.0 vol%*3

0.00- 10.00 ppm

GX-2012GT
Combustible gas<Leak check>*2(HC or CH4)

Detection
principle

0.00- 20.00 ppm

0.0- 400.0 ppm

Combustible gas(HC or CH4)

GX-2012010,000 ppm

0 - 100 %LEL/
100.0 vol%*3

0.0 15.0 ppm

GX-2012/GX-2012GT
Oxygen (O2)0100 %LEL*3

0.00- 20.00 ppm

Model
Detection
target gas

Non-dispersive infrared type

0.00
- 99.90 ppm*1: Additional precautions for use may be necessary depending on the combination. Please contact Riken Keiki for more information.
*2: In addition to VOCs, benzene can be selectively measured using a dedicated pre-filter (sold separately).
*3: The display automatically switches to vol% when gas is detected at 100 %LEL or above.

Combustible
gas
(CH4)

1 digit

Monitors

Monitors

Detection
principle

Dry battery unit (AA alkaline batteries × 3) (standard)or lithium ion battery unit (optional)

Explosion-proof
construction

Electrochemical type

Volatile organic compounds(VOCs)

Power source*2

Dry battery unit: Approx. 15 hours (with new batteries, at 25 °C, no alarm, no lighting)
Lithium ion battery unit: Approx. 10 hours (with full charge, at 25 °C, no alarm, no lighting)

Smart sensor lineup (Select up to two.*1)
Detection targetgas

IECEx, ATEX, Brazil Ex, Japan Ex, CE marking

Concentration Meters

Concentration Meters

New ceramic
type

IP67 equivalent

Certifications

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Detection
principle

IECEx: Ex ia II C/II B T4 Ga, ATEX: II 1G Ex ia II C/II B T4 Ga

Protection level

Continuous operatingtime

WeightCarbonmonoxide(CO)

Intrinsically safe explosion-proof construction

Japanese, English, French, Spanish, Portuguese, German, Italian, Russian, Korean

External dimensions

Hydrogensulfide(H2S)

Explosion-proof
construction

Display languages

Continuous operatingtime

Oxygen(O2)

GX-2012

LCD digital (full-dot matrix)

Explosion-proof class

Combustiblegas(HC/CH4)

Gas alarm, fault alarm
Lamp lit, continuous buzzer sounding, gas concentration readout blinking, vibration

Explosion-proof class

Pump suction type (Minimum suction flow rate: 0.45 L/min (open flow rate))

Display

Alarm type*1
Alarm pattern

Oxygen Monitors

Oxygen Monitors

Specifications

Pump suction type (Minimum suction flow rate: 0.45 L/min (open flow rate))

Combustible Gas Detectors

Combustible Gas Detectors(Select up to two smart sensors with or without a base sensor.)• Multilingual display support (Japanese, English, French, Spanish, etc.)• Equipped with convenient functions, including panic alarm, man down alarm, and LED flashlight• Allows selective benzene measurement (benzene select mode).

Detection target
gas

Hydrogen sulfide

Single-Component Gas Detectors

Single-Component Gas Detectors

Explosion-proof

Non-explosion-proof

Features

Base sensors (Select whether to include/exclude.)Carbon monoxide

Explosion-proof

Explosion-proof
Explosion-proof

Electronics

Multi gas detectors

Multi Gas Detectors

Portable Multi Gas Detector

6 components

9Standard suction-type four-component model				*1: Hydrogen sulfide (H2S) detection is available with GX-2012 only.
*2: Combustible gas leak checking (ppm detection) is available with GX-2012GT only. (The value indicated in leak check mode is the approximate concentration.)*3: High-concentration combustible gas (vol%) detection is available with CH4 model only.

10Capable of simultaneously detecting four different components with a rugged explosion-proof construction

GX-8000

Main areas of use
Electronics

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

RX-8000

Electronics

Construction sites

Steel plants

Shipping and shipbuilding

Laboratories and universities Volcanic and hot spring sites

Aerospace

Food industry

Oil refining and petrochemicals

Firefighting and rescue

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy◆ / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous◆: RX-8000 only

Detection target gases
4 components

Detection target gases

The detection target gases will vary depending on the particular model (sensors installed).

Combustible gas

OxygenCarbon monoxide

Hydrogen sulfide

Explosion-proof

Non-explosion-proof

The detection target gases will vary depending on the particular model (sensors installed).

2 components

Combustible gas

OxygenRX-8000

4 components

Methane

OxygenCarbon monoxide

3 components

HC

OxygenHydrogen sulfide RX-8700

Carbon dioxide RX-8500

Single-Component Gas Detectors

Single-Component Gas Detectors

Explosion-proof

Explosion-proof

Features

Explosion-proof

Non-explosion-proof• Capable of measuring combustible gas from high (vol%) to low (%LEL) concentrations• Powerful suction using high-flow pump
• Large, easy-to-read display with backlight and loud buzzer for high audibility• Concentrations are simultaneously indicated by digital readout and analog bar meter.

FeaturesRX-8500• Infrared sensor maintains high accuracy even in inert gas or N2 atmospheres.
• Complies with SOLAS convention amendments.
• Gas concentrations are simultaneously indicated by digital readout and on an analog bar meter.

Complies with MED (European Marine Equipment Directive).
JG (Ministry of Land, Infrastructure, Transport and Tourism) type approved

MarineJIS• Capable of measuring combustible gas (CH4 or HC) from low to high concentrations (auto range

selection)• Capable of high-concentration H2S measurement (0 - 1,000 ppm) RX-8700

Complies with JIS T 8201:2010 Oxygen deficiency indicator.

Specifications
Model* RX-8500/RX-8700 only

GX-8000
Pump suction type
(Minimum suction flow rate: 0.75 L/min (open flow rate))

Sampling method

Specifications

Alarm typeGas alarm, fault alarm

Alarm pattern

Lamp flashing, intermittent buzzer sounding, gas concentration readout blinking

Model

LCD digital (7-segment + symbols + bar meter)

Explosion-proof
construction

IECEx: Ex ia II C/II B T4 Ga, ATEX: II 1G Ex ia II C/II B T4 Ga

Protection level

IP67 equivalent

Certifications

IECEx, ATEX, Brazil Ex, Japan Ex, MED, JG, CE marking, JIS

Power source

Lithium ion battery unit or dry battery unit (AA alkaline batteries × 3)

Continuous operatingtime

Lithium ion battery unit: Approx. 12 hours(with full charge, at 25 °C, no alarm, no lighting)
Dry battery unit: Approx. 6 hours (at 25 °C, no alarm, no lighting)External dimensions

RX-8700

Operating temperature/humidity range

IECEx: Ex ia II C T4 Ga, ATEX: II 1G Ex ia II C T4 Ga

Protection level

IP67 equivalent

Certifications

IECEx, ATEX, Japan Ex, MED, JG,
CE marking

IECEx, ATEX, Japan Ex, MED, ABS, JG, NK, CE marking

Power source

Lithium ion battery unit or dry
battery unit (AA alkaline batteries
× 3)

Lithium ion battery unit or
dry battery unit (AA alkaline batteries × 3) (optional)

Lithium ion battery unit: Approx.
15 hours (with full charge, atLithium ion battery unit: Approx. 15 hours (with full charge, at 25 °C,
Continuous operating
25 °C, no alarm, no lighting)no alarm, no lighting)time
Dry battery unit: Approx. 10 hours Dry battery unit: Approx. 8 hours (with new batteries, at 25 °C, no(with new batteries, at 25 °C, noalarm, no lighting)alarm, no lighting)Combustible gas(HC/CH4/H2/C2H2)

Oxygen (O2)

Carbon monoxide (CO)Hydrogen sulfide (H2S)

Detection
principle

New ceramic type/
Thermal conductivity type

Galvanic cell type

Electrochemical type

Electrochemical type

Detectionrange

0 - 100 %LEL/
0 - 100.0 vol%0.0 - 25.0 vol%0 - 150 ppm

Display range

0 - 100 %LEL/
0 - 100.0 vol%0.0 - 40.0 vol%1 digit

1 %LEL/1 vol%0.1 vol%

Approx. 1.1 kg (with lithium ion
Approx. 1.2 kg (with lithium ion
Approx. 1.3 kg (with lithium ion
battery unit), approx. 1.0 kg (with battery unit), approx. 1.1 kg (with battery unit), approx. 1.2 kg (withdry battery unit)
dry battery unit)
dry battery unit)

WeightOperatingtemperature range-20 - +50 °C (no sudden fluctuations)

0.0 - 30.0 ppm

Operating humidityrange

0 - 95 %RH (no condensation)

0 - 500 ppm

0.0 - 100.0 ppm

1 ppm

0.5 ppm*1: If the optional gas alarm function is required, please specify at the time of purchase.
*2: Contact Riken Keiki if you require the optional gas alarm function.

1st 
2nd 
19.5 vol% TWA 
23.5 vol% STEL 
40.0 vol% OVER 

25 ppm 1st 
50 ppm 2nd 
25 ppm TWA 
200 ppm STEL 
500 ppm OVER 

5.0 ppm
30.0 ppm
10.0 ppm
15.0 ppm
100.0 ppm

Monitors

Monitors

Detection
target gas

Approx. 154 mm (W) × 81 mm (H) × 163 mm (D)(excluding projections)

Detection target gas list
Model

RX-8000

Detection
target gas

Combustible gas(HC/CH4)

Detection
principle

Non-dispersive
infrared type

Detectionrange

0.0 - 100.0 %LEL/
Up to 100.0 vol%(Auto range
selection)

Display range

0.0 - 100.0 %LEL/
Up to 100.0 vol%1 digit

0.5 %LEL/0.5 vol%RX-8500

RX-8700

Carbon monoxide(CO)

Carbon dioxide(CO2)

Combustible gas(HC)

Oxygen (O2)

Hydrogen sulfide (H2S)

Electrochemical typeNon-dispersive
infrared typeNon-dispersive
infrared type

Galvanic cell type

Electrochemical type

0.0 - 25.0 vol%0.0 - 30.0 ppm

0 - 1,000 ppm

Oxygen (O2)

Combustible gas(CH4)

Galvanic cell typeNon-dispersive
infrared type

0.0 - 25.0 vol%0.0 - 100.0 %LEL/
Up to 100.0 vol%(Auto range
selection)

0.0 - 25.0 vol%0 - 1,000 ppm

0.0 - 20.0 vol%0.0 - 100.0 %LEL/
Up to 100.0 vol%(Auto range
selection)

0.0 - 40.0 vol%0.0 - 100.0 %LEL/
5.0 - 100.0 vol%0.0 - 40.0 vol%0 - 10,000 ppm

0.0 - 20.0 vol%0.0 - 100.0 %LEL/
2.0 - 100.0 vol%0.0 - 40.0 vol%0.0 - 100.0 ppm

0 - 10,000 ppm

1 ppm

0.01 vol%(0 - 2.00 vol%)0.05 vol%(2.00 - 5.00 vol%)0.1 vol%(5.00 - 20.0 vol%)0.5 %LEL/0.5 vol%0.1 vol%

0.5 ppm

1 ppm

0.1 vol%

0.5 %LEL/0.5 vol%Oxygen (O2)
Galvanic cell type

0.1 vol%

Concentration Meters

Concentration Meters

Approx. 154 mm (W) ×
81 mm (H) × 127 mm (D)(excluding projections)

External dimensions

GX-8000

10 %LEL L 
50 %LEL H 
100 %LEL OVER Intrinsically safe explosion-proof construction

Explosion-proof class

Detection target gas list

1st 
2nd 
OVER 

LCD digital (7-segment + symbols + bar meter)

Explosion-proof
construction-20 - +50 °C (no sudden fluctuations),
0 - 95 %RH (no condensation)

Model

Lamp flashing, intermittent buzzer sounding, detail display

Display

Approx. 1.1 kg (with lithium ion battery unit),
Approx. 1.0 kg (with dry battery unit)

RX-8700
Gas alarm, fault alarm*2

Gas alarm, fault alarm*1

Alarm pattern

Approx. 154 mm (W) × 81 mm (H) × 127 mm (D) (excluding projections)

Weight

RX-8500

Pump suction type (Minimum suction flow rate: 0.75 L/min (open flow rate))

Alarm type

Intrinsically safe explosion-proof construction

Explosion-proof class

RX-8000

Sampling method

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Display

Oxygen Monitors

Oxygen Monitors

Complies with MED (European Marine Equipment Directive).
ABS (American Bureau of Shipping) type approved*
NK (Nippon Kaiji Kyokai) type approved*
JG (Ministry of Land, Infrastructure, Transport and Tourism) type approved

MarineCombustible Gas Detectors

Combustible Gas Detectors• Can be used with dedicated waist belt (optional) for improved wearability and stability during work.

Alarm
setpoints

11

Main areas of use

Portable Gas Detector
Oil refining and petrochemicals

Multi Gas Detectors

Multi Gas Detectors

Portable Gas Detector

Infrared type portable gas detector series

12Incorporates new R sensor for improved functionality and durability.
Main areas of use

SeriesElectronics

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Detection target gases
2 components

Carbon monoxide

OxygenCarbon monoxide

Hydrogen sulfide

Phosphine

Ammonia

Chlorine

Nitrogen dioxide

Sulfur dioxide

With dual sensor CX-04

series• Compact lightweight design that does not interfere withwork
* One-year sensor warranty for OX-04G, SC-04 (NH3), and SC-04 (CL2)Model

Detection target gases

Refer to detection target gas list.
Diffusion typeGas alarm, fault alarm
Lamp flashing, intermittent buzzer sounding, gas concentration readout blinking, vibration

Protection level
Certifications
Power source
External dimensions/weightOperatingtemperature range*1
Operating humidity
range*1

CO-04

Hydrogen sulfide (H₂S)

0.0 - 40.0 %0.0 - 25.0%

0.0 - 200.0 ppm
0.0 - 100.0 ppm

Continuous operatingtime*

Approx. 9,000 hours
Approx. 6,000 hours

Approx. 3,000 hours
Approx. 2,000 hours

Approx. 9,000 hours
Approx. 6,000 hours

Approx. 9,000 hours
Approx. 6,000 hours

Model
Detection target gas
Detection principle
Display range
Detection range

SC-04 (SO2)
Sulfur dioxide (SO₂)

SC-04 (NO2)
Nitrogen dioxide (NO₂)

0.00 - 100.000 ppm
0.00 - 20.00 ppm

0.00 - 20.00 ppm
0.00 - 20.00 ppm

SC-04 (HCN)
SC-04 (PH3)
Hydrogen cyanide (HCN)
Phosphine (PH₃)
Electrochemical type0.00 - 30.00 ppm
0.0 - 20.0 ppm
0.00 - 30.00 ppm
0.0 - 20.0 ppm

Approx. 6,200 hours
Approx. 4,200 hours

CX-04
Carbon monoxide (CO)
0 - 2,000 ppm
0 - 500 ppm

Oxygen (O₂)
0.0 - 40.0 vol%0.0 - 25.0 vol%Approx. 4,600 hours
Approx. 3,000 hours

SC-04 (NH3)Ammonia (NH₃)

SC-04 (CL2)
Chlorine (Cl2)0.00 - 400.00 ppm
0.00 - 300.00 ppm

0.0 - 20.00 ppm
0.0 - 10.00 ppm• Can be worn wristwatch-style using the accessory (watch band) provided.
• Three-year sensor warranty*• Extensive gas specification lineup with six models in the series• Dust-proof, waterproof construction for peace of mind when working outdoors (protection level

equivalent to IP66/68 (2 m, 1 h))* One-year sensor warranty for GW-3 (O2) only

Compact combustible gas detector
Main areas of use
Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

MiscellaneousSpecifications
Model

Refer to detection target gas list.
Diffusion type

Alarm typeGas alarm, fault alarm

Alarm pattern

Lamp flashing, intermittent buzzer sounding, gas concentration readout blinking, vibration

Explosion-proof
construction

Intrinsically safe explosion-proof construction

Explosion-proof class

IECEx: Ex ia II C T4 Ga, ATEX: II 1G Ex ia II C T4 Ga

Protection level

Equivalent to IP66/68 (2 m, 1 h)

Certifications

IECEx, ATEX, China Ex, Japan Ex, CE marking, Brazil Ex (contact Riken Keiki for corresponding models), JIS [GW-3 (O2)/GW-3 (HS)]Power source

CR2450 coin type lithium ion battery

Continuous operatingtime

Approx. 4,000 hours [GW-3 (O2)/GW-3 (HS)/GW-3 (CO)], approx. 2,000 hours [GW-3 (OX)/GW-3 (CX)], approx. 2,500 hours [GW-3 (C-)]

External dimensions

Approx. 63 mm (W) × 42 mm (H) × 22 mm (D) (excluding projections)Combustible gas

Explosion-proof
Non-explosion-proof

Approx. 45 g

Operatingtemperature range-20 - +50 °C (no sudden fluctuations) [GW-3 (O2)], -20 - +60 °C (no sudden fluctuations)*1 [GW-3 (OX)/GW-3 (HS)/GW-3 (CO)/GW-3 (C-)/GW-3 (CX)]

Operating humidity
range

10 - 90 %RH (no condensation) [GW-3 (O2)], 0 - 95 %RH (no condensation)*2 [GW-3 (OX)/GW-3 (HS)/GW-3 (CO)/GW-3 (C-)/GW-3 (CX)]*1: In temporary ambient conditions for approximately 15 minutes. The operating temperature range for continuous ambient conditions is as follows: Temperature: -20 - +50 °C (no sudden fluctuations)*2: In temporary ambient conditions for approximately 15 minutes. The operating humidity range for continuous ambient conditions is as follows: Humidity: 10 - 90 %RH (no condensation)

Detection target gas list
Model

GW-3 (O2)

Detection target gas

Oxygen (O2)

Detection principle

Galvanic cell type

Display range
Detection range

Power source
Continuous operatingtime
External dimensions/weight
Operating temperature/humidity range

GP-03
Diffusion typeCombustible gas (HC or CH4)
New ceramic type0 - 100 %LEL
Gas alarm, fault alarm
Lamp flashing, intermittent buzzer, gas concentration readout blinking, vibration
Intrinsically safe explosion-proof construction
IECEx: Ex ia II B T4/T3 Ga, Ex ia I Ma, ATEX: II 1G Ex ia II B T4/T3 Ga, I M1 Ex ia I Ma
IP67 equivalent
IECEx, ATEX, Japan Ex, CE marking
AAA alkaline batteries × 2 (dry battery specifications) or
AAA nickel hydride batteries ×2 (rechargeable battery specifications)
Dry battery specifications: Approx. 35 hours (with new batteries, at 25 °C, no alarm, no lighting),
Rechargeable battery specifications: Approx. 30 hours (with full charge, at 25 °C, no alarm, no lighting)Approx. 54 mm (W) × 67 mm (H) × 24 mm (D) (excluding projections)/Approx. 80 g (excluding clip)-20 - +50 °C (no sudden fluctuations), 0 - 90 %RH (no condensation)

Alarm setpoints

GW-3 (C-)
Carbon monoxide (CO)(Hydrogen interference
reduction)

Hydrogen sulfide (H2S)

Carbon monoxide (CO)0.0 - 40.0 vol%0.0 - 40.0 vol%0.0 - 200.0 ppm

0 - 2,000 ppm

0.0 - 25.0 vol%0.0 - 25.0 vol%0.0 - 100.0 ppm

0 - 500 ppm

0.1 vol%

0.1 ppm(0.0 - 30.0 ppm)
1.0 ppm(30.0 - 200.0 ppm)

1 ppm
(0 - 300 ppm)
10 ppm(300 - 2,000 ppm)

0.1 vol%LLL
H

GW-3 (CO)Oxygen (O2)

Specifications
Model
Sampling method
Detection target gas
Detection principle
Detection range
Alarm type
Alarm pattern
Explosion-proof construction
Explosion-proof classProtection level
Certifications

GW-3 (HS)18.0 vol% L
18.0 vol% LL
25.0 vol% H

GW-3 (CX)
Carbon monoxide (CO)Oxygen (O2)

0 - 2,000 ppm

0 - 2,000 ppm

0.0 - 40.0 vol%0 - 500 ppm

0 - 500 ppm

0.0 - 25.0 vol%1 ppm
(0 - 300 ppm)
10 ppm(300 - 2,000 ppm)

1 ppm
(0 - 300 ppm)
10 ppm(300 - 2,000 ppm)

0.1 vol%

Electrochemical type18.0 vol% 1st18.0 vol% 2nd25.0 vol% 3rd
TWA
STEL

5.0 ppm
30.0 ppm
100.0 ppm
1.0 ppm
5.0 ppm

1st
2nd
3rd
TWA
STEL

25 ppm50 ppm
1,200 ppm
25 ppm200 ppm

1st
2nd
3rd
TWA
STEL

25 ppm50 ppm
1,200 ppm
25 ppm200 ppm

1st
2nd
3rd
TWA
STEL

25 ppm L
50 ppm LL
1,200 ppm H
25 ppm200 ppm

18.0 vol%18.0 vol%25.0 vol%Monitors

Monitors

1 digit

GW-3 (OX)

Concentration Meters

Concentration Meters

Electronics

Detection target gases

hazardous locations.

JIS T 8201:2010 GW-3 (O2)
JIS T 8205:2018 GW-3 (HS)JIS

Weight* Upper row: Dry battery, lower row: Ni-MH battery• Inherently safe explosion-proof construction allows use inNon-explosion-proof

Sampling method

Approx. 3,000 hours
Approx. 2,000 hours

Explosion-proof

Hydrogen sulfide

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Oxygen (O₂)

scratches, dirt, and impact.

Carbon monoxide

0 - 95 %RH (no condensation) [excluding OX-04G*3]

Oxygen (O₂)

• Compact lightweight design that does not interfere with work

OxygenApprox. 54 mm (W) × 67 mm (H) × 24 mm (D) (excluding projections) / Approx. 93 g

Galvanic cell type
0.0 - 40.0 %0.0 - 25.0%

for repeated use.

1 component• Compact lightweight design that does not interfere with work

-40 - +60 °C (no sudden fluctuations) [excluding OX-04G, SC-04 (HCN), SC-04 (NH3)*2]

Detection principle
Display range
Detection range• Standard protective cover protects the main unit from

Carbon monoxide• Among the world’s smallest, lightest portable single-component gas detectors

Intrinsically safe explosion-proof construction<Dry cell battery model> IECEx: Ex ia II C T4 Ga, ATEX: II 1G Ex ia II C T4 Ga<Rechargeable battery model> IECEx: Ex ia II C T3 Ga, ATEX: II 1G Ex ia II C T3 Ga
IP66/67 equivalent
IECEx, ATEX, Brazil Ex, Japan Ex, CE marking
AAA alkaline or Ni-MH (eneloop) batteries × 2

Detection target gas• The product now includes rechargeable battery specifications

OxygenFeatures

Model
Sampling method
Alarm type
Alarm pattern
Explosion-proof
construction
Explosion-proof class

1 component

The detection target gases will vary depending on the particular model (sensors installed).

2 components

Explosion-proof

Non-explosion-proof

CO-04 (C-)
Carbon monoxide (CO)Carbon monoxide (CO)(Reduced hydrogeninterference)
Electrochemical type0 - 2,000 ppm
0 - 2,000 ppm
0 - 500 ppm
0 - 500 ppm

FeaturesFood industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Explosion-proof

HS-04

GP-03

Aerospace

Explosion-proof

OX-04

Portable Gas Detector

Shipping and shipbuilding

Volcanic and hot spring sites

Explosion-proof

OX-04G

Continuous operatingtime*

Steel plants

Laboratories and universities

Miscellaneous

Hydrogen cyanide*1: In temporary ambient conditions for approximately 15 minutes. The operating temperature and humidity ranges for continuous ambient conditions
are as follows: SC-04 (HCN)(NH3) Temperature: -20 - +50 °C (no sudden fluctuations) / Humidity: 10 - 90 %RH (no condensation)*2: OX-04G: -20 - +50 °C, SC-04 (HCN): -20 - +60 °C, SC-04 (NH3): -30 - +50 °C (no sudden fluctuations)*3: OX-04G: 10 - 90 %RH (no condensation)

Detection target gas list

Construction sites

Firefighting and rescue

Oxygen Monitors

Oxygen Monitors

JIS T 8201:2010 OX-04G
JIS T 8205:2018 HS-04

Oil refining and petrochemicals

Combustible Gas Detectors

Combustible Gas Detectors• Long continuous operating times• Choice of dry battery or rechargeable battery power supply• Improved durability (withstands 7 m drop testing)• Three-year sensor warranty*• Extensive gas specification lineup with 12 models in theElectronics

Single-Component Gas Detectors

Single-Component Gas Detectors• Reduced hydrogen interference CO-04 (C-) /13

SeriesSpecifications

Features

JIS

GW-3

The detection target gases will vary depending on the particular model (sensors installed).

Oxygen1 component

Main areas of use

Portable Gas Detector
Oil refining and petrochemicals

Multi Gas Detectors

Multi Gas Detectors

Portable Gas Detector

04

Among the world’s smallest, lightest portable gas detectors

14

Portable combustible gas detector series
Main areas of use

to prevent explosion

Electronics

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations◆2 / Environment and risk assessment

Miscellaneous◆1: GP-1000/NP-1000 ◆2: NC-1000

Detection target gases

for low concentrations

1 component

Combustible gas

Single-Component Gas Detectors

Explosion-proof
Explosion-proof

for high concentrations

Non-explosion-proof

Detection target gas

Methane(CH4)

Isobutane(i-C4H10)

Hydrogen(H2)

Methanol(CH3OH)

Acetylene(C2H2)

Ethylene(C2H4)

Ethane(C2H6)

Ethanol(C2H5OH)

Propylene(C3H6)

Acetone(C3H6O)

Propane(C3H8)

Butadiene(C4H6)

Cyclopentane(C5H10)Lower explosive limit LEL

5.0 vol%

1.8 vol%

4.0 vol%

5.5 vol%

1.5 vol%

2.7 vol%

3.0 vol%

3.3 vol%

2.0 vol%

2.15 vol%2.0 vol%

1.1 vol%

1.4 vol%

Converted from methane

―

○

○

○

○

○

○

○

○

○

○

○

○

Converted from
isobutane

×

―

○

○

○

○

×

○

○

○

×

○

○

Detection target gas

Benzene(C6H6)

N-hexane(n-C6H14)

Toluene(C7H8)

Heptane(n-C7H16)

Xylene(C8H10)Ethyl acetate(EtAc)

IPA
(IPA)

MEK
(MEK)

Methylmethacrylate(MMA)

Dimethyl
ether
(DME)

Methyl isobutyl
ketone(MIBK)

Tetrahydrofuran(THF)

Lower explosive limit LEL

1.2 vol%

1.2 vol%

1.2 vol%

1.1 vol%

1.0 vol%

2.1 vol%

2.0 vol%

1.8 vol%

1.7 vol%

3.0 vol%

1.2 vol%

2.0 vol%

Converted from methane

○

○

○

○

○

○

○

○

○

○

○

○

Converted from
isobutane

○

○

○

○

○

○

○

○

○

○

○

○

* Parameters such as alarm accuracy and response time are checked using only calibration gas.
* For calibration with gases other than methane or isobutane, please contact Riken Keiki.
* Note that the detection gas type cannot be switched after calibrating with a gas other than methane or isobutane.

Features• Incorporates a detection gas type switching function to detect 25 different combustible gases(methane, hydrogen, benzene, toluene, xylene, etc.) with a single unit GP-1000 NC-1000• Includes pump booster feature o provide suction force even over long distances.

NP-1000 detection target gas list
Detection target gas

Methane(CH4)

Propane(C3H8)

Isobutane(i-C4H10)

Argon
(Ar)

Helium(He)

Hydrogen(H2)

Combustible Gas Detectors

Combustible Gas Detectors* When used for hydrogen detection, the unit becomes a dedicated hydrogen detector. The conversion function is not available
for other gases.

NP-1000 base gas list
Detection target gas

Air

Nitrogen(N2)

Carbon dioxide(CO2)Oxygen Monitors

Oxygen Monitors(Suction flow rate: 0.3 L/min ⇒ 0.6 L/min)• A cartridge-type filter (sold separately) can be attached to the standard probe.
(Example filter types: for hydrogen sulfide removal, for silicon removal)• Capable of measuring all types of combustible gases at ppm concentrations NC-1000• The range display switches automatically (between Low and High) to suit the measurements.
NC-1000• Capable of measuring gases in N2 or CO2 in units of vol% NP-1000• Select a base gas from air, nitrogen, or carbon dioxide. NP-1000• Incorporates a measurement target gas type switching function to detect five different gas types(methane, propane, isobutane, argon, and helium) with a single unit. NP-1000

Preventing explosions caused by combustible gas leaks

MarineJG (Ministry of Land, Infrastructure, Transport and Tourism) type approved GP-1000(TYPE LEL)

Specifications
Model

GX-8000

GP-1000

Sampling method

NC-1000

NP-1000

Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Detection target gases
Single component

Combustible gas

Pump suction type (Minimum suction flow rate: 0.3 L/min for Low setting, 0.6 L/min for High setting)

Detection target gas

Explosion-proof

Refer to detection target gas list (page 17).

Detection principle

New ceramic type

Thermal conductivity type

Detection range

0 - 100 %LEL

0 - 10,000 ppm

0 - 100 vol%Alarm setpoints(Can be set by user.)1st 10 %LEL
2nd 50 %LEL

1st 250 ppm
2nd 500 ppm—

Gas alarm, fault alarm

Alarm type*1

Explosion-proof

Non-explosion-proof

Specifications

Gas alarm (standard off setting), fault alarm

Model

GX-8000 (TYPE LEL)

Lamp flashing, intermittent buzzer, detail display

Sampling method

Display

LCD digital (7-segment + symbols + bar meter)

Detection target gas

Combustible gas (CH4, HC, H2)

Explosion-proof
construction

Intrinsically safe explosion-proof construction

Detection principle

New ceramic type (catalytic type)

Detection range

0 - 100 %LEL

Explosion-proof class

IECEx: Ex ia II B T4 Ga, ATEX: II 1G Ex ia II B T4 Ga

Protection level
Certifications

IECEx: Ex ia II C T4 Ga, ATEX: II 1G Ex ia II C T4 Ga

1 digit

IP67 equivalent
IECEx, ATEX, Japan Ex, JG, CE marking

Power source

IECEx, ATEX, Japan Ex, CE marking

Alarm setpoints(Can be set by user.)

IECEx, ATEX, Japan Ex, CE marking

AA alkaline batteries × 4
Approx. 20 hours or more(with new batteries, at 25 °C, no alarm, no lighting)External dimensions

HC model: Approx. 20 hours, CH4 model: Approx. 15 hours(with new batteries, at 25 °C, no alarm, no lighting)Approx. 80 mm (W) × 124 mm (H) × 36 mm (D) (excluding projections)
Approx. 260 g (excluding dry batteries)

Operatingtemperature range-20 - +50 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)*1: NP-1000 can be enabled/disabled (disabled by default), alarm setpoints can be set by user.

Features• Dust-proof/waterproof construction allowing use even in

bad weather (protection level equivalent to IP67)• Incorporates a powerful pump capable of performing

rapid suction from 30 m away.
(Minimum flow rate: 0.75 L/min)• Environmentally-friendly, long-life lithium ion battery
specifications are also selectable.

Alarm typeGas alarm, fault alarm

Alarm pattern

Lamp flashing, intermittent buzzer, gas concentration readout blinking

Display
Explosion-proof
construction
Explosion-proof class

Complies with MED (European Marine
Equipment Directive).

LCD digital (7-segment + symbols + bar meter)
Intrinsically safe explosion-proof construction
IECEx: Ex ia II C/II B T4 Ga, ATEX: II 1G Ex ia II C/II B T4 Ga

Protection level

IP67 equivalent

Certifications

IECEx, ATEX, Japan Ex, MED, JG, CE marking

Power source

Dry battery unit (AA alkaline batteries × 3)
or lithium ion battery unit

Continuous operating
time

Marine1 %LEL
1st: 10 %LEL
2nd: 50 %LEL
OVER: 100 %LEL

External dimensions
WeightMonitors

Monitors

WeightApprox. 30 hours(with new batteries, at 25 °C, no alarm, no lighting)

Pump suction type (Minimum suction flow rate: 0.75 L/min (open flow rate))

Concentration Meters

Concentration Meters

Alarm patternCompact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Portable Gas Detector for
Combustible Gas Measurement

Continuous operating
time

15

Single-Component Gas Detectors

GP-1000
NC-1000
NP-1000

GP-1000/NC-1000 detection target gas list
◆1

Oil refining and petrochemicals

Multi Gas Detectors

Multi Gas Detectors

Portable Combustible Gas Detector

Dry battery unit: Approx. 6 hours (with new batteries, at 25 °C, no alarm, no lighting)
Lithium ion battery unit: Approx. 12 hours (with full charge, at 25 °C, no alarm, no lighting)Approx. 154 mm (W) × 81 mm (H) × 127 mm (D) (excluding projections)
Approx. 1.0 kg (with dry battery unit), approx. 1.1 kg (with lithium ion battery unit)

Operating temperature
range-20 - +50 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)

16

Preventing accidents due to excess or lack of oxygen

Includes optical interferometric sensor ideal for precise measurement of different gas concentrations.

Main areas of use

GX-8000

Main areas of use

Optical Interferometric Gas Monitor

Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

FI-8000

1 component

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Detection target gases(TYPE O2)

Electronics

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases

Oxygen1 component

Anesthetic gas

Fumigation gas

Multi Gas Detectors

Multi Gas Detectors

Portable Gas Detector for
Oxygen Concentration Measurement

Other gas concentration and calorific value

Explosion-proof
Explosion-proof

Non-explosion-proof

Features

Explosion-proof• Incorporates a powerful pump capable of performing rapid suction from 30 m away.

Specifications(Minimum flow rate: 0.75 L/min)• Uses high-volume buzzer emitting at least 95 dB(A) (at 30 cm)

Specifications

Complies with MED (European Marine Equipment
Directive).

JIS

Complies with JIS T 8201: 2010 Oxygen deficiency
indicator.

GX-8000 (TYPE O2 L)/GX-8000 (TYPE O2 N)*1
Pump suction type (Minimum suction flow rate: 0.75 L/min (open flow rate))
Gas alarm*1, fault alarm
Lamp flashing, intermittent buzzer sounding, gas concentration readout blinking
LCD digital (7-segment + symbols + bar meter)• Choice of two suction methods

Intrinsically safe explosion-proof construction-20 - +50 °C (no sudden fluctuations)

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

1 component

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Toxic gas

Explosion-proof
Non-explosion-proof

Specifications
Model

SC-8000

Sampling method

Pump suction type (Suction flow rate: approx. 0.5 L/min)

Detection principle

Electrochemical type

Alarm typeGas alarm, fault alarm

Alarm pattern

Lamp flashing, intermittent buzzer, gas concentration readout blinking

Sevoflurane
Ozone
Helium

Propylene oxide
OxygenCarbon monoxide
Normal butane

Methyl bromide
Dioxolane
Ethyl alcohol
PropaneXenon
Freon 410A

indicates anesthetic gas specification.
Desflurane
Difluoromethane
MethaneMeasurement target gases (48 mm chamber length)
Sulfuryl fluoride
Butyl acetate
Isopropyl alcohol
Toluene

Chlorine
PropanePropane-air

Halothane
Deuterium

Nitrous oxide
HydrogenNatural gas or natural gas + LPG

Acetylene
Carbon dioxide

Ethylene
Neon

indicates fumigation gas specification.
Methyl iodide
Dichloroethane
Ethyl benzene
MethanolPhosphine
Hydrogen
Ethylene
MethaneHydrogen cyanide
AcetoneStyreneNitrogen
Ethylene chloride
XyleneMethyl isobutyl ketone Methyl isopropyl ketone

Ammonia
Tetrahydrofuran
Ethyl acetate
Methyl ethyl ketone

Isobutane
Tetrafluoropropene

LCD digital (7-segment + symbols + bar meter)

Monitors

Intrinsically safe explosion-proof construction / IECEx: Ex ia II C T4 Ga, ATEX: II 1G Ex ia II C T4 Ga
IP67 equivalent

Certifications

IECEx, ATEX, Japan Ex, CE marking• Variable buzzer volume function

Power source• Two easy-to-read display indicators (digital/analog)

Continuous operating time

• Selectable target gases

External dimensions

Dry battery unit (AA alkaline batteries × 3) (standard) or lithium ion battery unit (optional)
Dry battery unit: Approx. 18 hours (with new batteries, at 25 °C, no alarm, no lighting)
Lithium ion battery unit: Approx. 25 hours (with full charge, at 25 °C, no alarm, no lighting)Approx. 154 mm (W) × 81 mm (H) × 154 mm (D) (excluding projections)

WeightOperating temperatureand humidity range*1

Detection target gases

Isoflurane
Enflurane
PropaneVinyl chloride
Normal butane
Butane-air

Monitors

Display
Explosion-proof construction/
Explosion-proof classProtection level• Dust-proof/waterproof enclosure allows use anywhere.

Ethylene
Carbon dioxide
Sulfur hexafluoride

Concentration Meters

Concentration Meters

Explosion-proof-20 - +50 °C (no sudden fluctuations), 0 - 95 %RH (no condensation)

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Electronics
Firefighting and rescue

Detection target gases• Extensive gas compatibility lineup

Isobutane
Hydrogen
Methyl bromide

Measurement target gases (24 mm chamber length)

Miscellaneous

IP67 equivalent
IECEx, ATEX, Japan Ex, CE marking
Dry battery unit (AA alkaline batteries × 3) or lithium ion battery unit
Dry battery unit: 12 hours*2
Dry battery unit: 16 hours*2
Lithium ion battery unit: 18 hours*3
Lithium ion battery unit: 24 hours*3
Approx. 154 mm (W) × 127 mm (H) × 81 mm (D)Approx. 1.1 kg (with dry battery unit), approx. 1.2 kg (with lithium ion battery unit)*1: Indication accuracy will vary depending on the measurement target gas. *2: With new batteries, at 25 °C, no lighting*3: With full charge, at 25 °C, no lighting

Acetylene
Dimethyl ether
Freon 22Main areas of use

SC-8000

Intrinsically safe explosion-proof construction / IECEx: Ex ia II C T4 Ga, ATEX: II 1G Ex ia II C T4 Ga

Measurement target gases (5 mm chamber length)0 - 95 %RH (no condensation)

Portable gas detector for toxic gas detection
Portable Gas Detector

Automatic suction using the built-in pump/manualsuction using the hand aspirator• Includes intermittent measurement mode (automatic
suction only).
• Large LCD screen for easy viewing

Oxygen Monitors

Oxygen Monitors

IECEx: Ex ia II C T4 Ga, ATEX: II 1G Ex ia II C T4 Ga
IP67 equivalent
IECEx, ATEX, Japan Ex, MED, JG, JIS, CE marking
Dry battery unit (AA alkaline batteries × 3) or lithium ion battery unit
Dry battery unit: Approx. 12 hours (with new batteries, at 25 °C, no alarm, no lighting)
Lithium ion battery unit: Approx. 20 hours (with full charge, at 25 °C, no alarm, no lighting)Approx. 154 mm (W) × 81 mm (H) × 127 mm (D) (excluding projections)
Approx. 1.0 kg (with dry battery unit), approx. 1.1 kg (with lithium ion battery unit)*1: L includes gas alarms; N does not include gas alarms.

Features17• A single unit can measure up to eight different gas types.

FI-8000 TYPE P-□□-□□
FI-8000 TYPE A-□□-□□
Automatic suction using built-in pump
Manual suction using hand aspirator±3 % of readout (under identical conditions)*1
Fault alarm
Lamp flashing, buzzer sounding, detail display
LCD digital (7-segment numerical + symbols + 20-segment alphabetic × 2 rows)

Combustible Gas Detectors

Combustible Gas Detectors

MarineModel
Sampling method
Indication accuracy
Alarm type
Alarm pattern
Display
Explosion-proof construction/
Explosion-proof classProtection level
Certifications
Power source
Continuous operatingtime
External dimensions
WeightOperating temperature/humidity range

Features

Model
Sampling method
Alarm type
Alarm pattern
Display
Explosion-proof
construction
Explosion-proof classProtection level
Certifications
Power source
Continuous operatingtime
External dimensions
WeightOperating temperature
range
Operating humidity
range

Non-explosion-proof

Single-Component Gas Detectors

Single-Component Gas Detectors

Explosion-proof

Approx. 1.0 kg (with dry battery unit), approx. 1.1 kg (with lithium ion battery unit)-10 - +40 °C (no sudden fluctuations), 30 - 70 %RH (no condensation)*1: May vary depending on the sensors installed.

Detection target gas

ArsineDiboraneBromineAcetic acid

BTBAS

Chlorine

Chlorine trifluoride

Carbon monoxide

Dimethylamine

Fluorine

Chemical formula

AsH3

B2H6

Br2

CH3COOH

C8H22N2Si

Cl2

ClF3

CO

DMA

F2

Germane
GeH4

Detection target gas

Hydrogen peroxide

Hydrogen sulfide

Hydrogen selenide

Hydrogen bromide

Hydrogen chloride

Hydrogen cyanide

Formic acid

Hydrogen fluoride

Hydrogen iodide

Nitric acid

IodineChemical formula

H2O2

H2S

H2Se

HBr

HCl

HCN

HCOOH

HF

HI

HNO3

I2

Detection target gas

Hydrazine

Ammonia

Nitrogen monoxide

Nitrogen dioxide

Ozone

Phosphorus trifluoride

Phosphine

Disilane

Trisilyl amine

SilaneSulfur dioxide

Chemical formula

N2H4

NH3

NO

NO2

O3

PF3

PH3

Si2H6

Si3H9N

SiH4

SO2

18

Explosion-proof gas leak detector

SP-220Electronics

Detection target gas list
Construction sites

Oil refining and petrochemicals

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites◆2

Steel plants◆2

Aerospace

Shipping and shipbuilding◆1

Food industry

Model

◆1

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations◆2 / Environment and risk assessment

Miscellaneous◆1: TYPE F ◆2: TYPE H2

Detection target gases
1 component

City gas

Detection target gas*1
Calibration gas

The detection target gases will vary depending on the particular model (sensors installed).

LPG

1 component

Fluorocarbon gas (TYPE F)

1 component

Hydrogen gas (TYPE H2)

SP-220(TYPE M)

(TYPE F)
SP-220(TYPE L)

SP-220(TYPE ML)(TYPE H2)
R600a
(Isobutane)
Freon 123
Freon 142bFreon 32
Freon 407C
Freon 404A
Freon 507A

Detection target gas
Freon

City gas
LPG
City gas/(switchable to LPG) (switchable to city gas) LPG (selectable)
City gas(CH4) calibration

LPG (i-C4H10)
Calibration

LPG (i-C4H10) and citygas (CH4) dual gas
calibration

R290a(Propane)Freon 134a
Freon 22
Freon 23
Freon 410A
HFO-1234yf
Freon 407A

Detection target gas
Hydrogen, methane(calibration gas: H2 andCH4 dual gas calibration)

MethaneAcetylene

EthanePropaneIsobutylene

Isobutane

N-hexaneFreon 134a

Hydrogen

Ethylene

Propylene

Butadiene

Normal butane

Cyclopentane

Freon 22

HFO-1234yf*1: Measurements with TYPES M, L, and ML are performed by switching between city gas and LPG calibration curves by button operation (soft). TYPE ML offers high reliability for measuring two gas types due to independent adjustments using both city gas (CH4) and LPG (i-C4H10).

(TYPE M, TYPE L, TYPE ML)

For information on conversion gases, please refer to catalog or instruction manual.

(TYPE FUM, TYPE SC)
Model

Explosion-proof
Explosion-proof(TYPE M, TYPE L, TYPE ML)

Detection target gas

Non-explosion-proof

FeaturesSP-220 (TYPE FUM)
Phosphine
Sulfuryl fluoride
Phosphine
Ethylene
Methyl bromide Ethylene dibromide*1*1
Carbon disulfide
Trichloroethylene
Methyl iodide
N-hexaneHydrogen cyanide
GermaneSP-220 (TYPE SC)
Ammonia
Isobutane
Isopropyl alcohol Carbon monoxide
XyleneEthylene oxide
SilaneMethyl bromide
Sulfur dioxide
PropaneFreon 134a
Freon 22
Methane
Methyl alcohol Methyl ethyl ketone Hydrogen sulfide
Freon 407C
Hydrogen selenide
Freon 410A
Freon 404A

AcetoneArsineVinyl chloride
Methyl chloride
Toluene1,2-dichloroethane
BenzeneFormaldehyde
Hydrogen bromide Hydrogen chloride

Ethyl alcohol
HydrogenFreon 32
Diborane
HFO-1234yf*1: Gases whose use is prohibited in JapanFor easy formaldehyde measurement indoors
Formaldehyde Gas Detector

Specifications
SP-220 (TYPE M)/SP-220(TYPE L)/SP-220 (TYPE ML)

Model

10 - 10,000 ppm

SP-220 (TYPE F)

SP-220 (TYPE H2)

Pump suction typeHot-wire semiconductor type
Depends on detection target gas.
Can be set in 5 steps.
Lamp flashing, intermittent buzzer
LCD bar meter and scale display

Depends on detection target gas.

FP-31

Main areas of use
Electronics

Construction sites

Steel plants

Shipping and shipbuilding

Laboratories and universities Volcanic and hot spring sites

Aerospace

Food industry

Oil refining and petrochemicals

Firefighting and rescue

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Detection target gases

Intrinsically safe explosion-proof construction / IECEx: Ex ia II C T4 Ga, ATEX: II 1G Ex ia II C T4 Ga

1 component

Formaldehyde

Explosion-proof

Approx. 13 hours (with new batteries, at 25 °C, no alarm, no lighting)Approx. 43 mm (W) × 200 mm (H) × 39 mm (D) (excluding tapered nozzle)/
Approx. 215 g (excluding dry batteries)-20 - +55 °C (no sudden fluctuations), 0 - 95 %RH (no condensation)

Explosion-proof

Non-explosion-proof

Features• Simply set the detection TAB on the main unit to begin measurement.
• Large, easy-to-read digital display allows direct reading of concentrations.
• Incorporates self-diagnosis function that indicates the timing for battery replacement or poor pump

Fumigation gas/semiconductor material gas leak detector
Portable Gas Leak Detector

SP-220Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Detection target gases
1 component

The detection target gases will vary depending on the particular model (sensors installed).

Fumigation gas (TYPE FUM)
Semiconductormaterial gas

1 component(TYPE SC)

Explosion-proof
Explosion-proof

Non-explosion-proof

Specifications
Model
Sampling method
Alarm type
Alarm pattern
Display
Certification
Power source
Continuous operatingtime
External dimensions/weightOperating temperature/humidity range

FP-31
Pump suction type/Cumulative value within time period type (Suction flow rate: 0.5 L/min)Fault alarm
Buzzer, detail display
LCD digital display
CE marking
AA alkaline batteries × 4
Approx. 12 hours (with new batteries, at 20 °C, no alarm, no lighting)Approx. 80 mm (W) × 150 mm (H) × 40 mm (D) (excluding projections)/
Approx. 250 g (excluding batteries)

Concentration Meters

Concentration Meters

TYPE FUM for fumigation gas
TYPE SC for semiconductor material gas

connections via buzzer and visual display.

• Precise and highly resistant to electromagnetic interference

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

Compact Single-Component Gas Detectors Toxic Gas & Special Gas Detectors

IP55 equivalent
IECEx, ATEX, Japan Ex, CE marking
AA alkaline batteries × 2

Oxygen Monitors

Oxygen Monitors

Sampling method
Detection principle
Detection range
Alarm setpoints
Alarm pattern
Display
Explosion-proof construction/
Explosion-proof classProtection level
Certifications
Power source
Continuous operatingtime
External dimensions/weightOperating temperature/humidity range

Combustible Gas Detectors

Combustible Gas Detectors• Able to quickly and reliably detect low-concentration gas leaks.
• Compact and lightweight yet tough exterior• Incorporates internal filter for improved sensor durability.
• Gas concentrations can be read off easily at the press of a button.
• Features a data logger function.
• LED lighting allows accurate measurement even in dark locations.

Single-Component Gas Detectors

Single-Component Gas Detectors

TYPE M for city gas
TYPE L for LPG
TYPE ML for city gas/LPG
TYPE F for fluorocarbon gas
TYPE H2 for hydrogen gas

Main areas of use

Multi Gas Detectors

Multi Gas Detectors

Portable Gas Leak Detector-10 - +40 °C (no sudden fluctuations), 0 - 90 %RH (no condensation)*1*1: The operating temperature and humidity ranges for detection TABs are indicated on the corresponding detection TAB.

• Compact and lightweight yet tough exterior• Fast, reliable detection of low concentration gas• Gas concentrations for multiple gases can be read off easily

Model
Sampling method
Detection principle
Detection range
Alarm setpoints
Alarm pattern
Protection level
Certification
Power source
Continuous operating time

• Features data logger function.
• LED lighting allows accurate measurement even in dark

Operating temperature/humidity range

Featuresat the press of a button.
locations.

19

External dimensions/weightSP-220 (TYPE FUM)/SP-220 (TYPE SC)
Pump suction typeHot-wire semiconductor type
Depends on detection target gas.
Depends on detection target gas.
Lamp flashing, intermittent buzzer
IP55 equivalent
CE marking
AA alkaline batteries × 2
Approx. 13 hours (with new batteries, at 25 °C, no alarm, no lighting)Approx. 43 mm (W) × 200 mm (H) × 39 mm (D) (excluding tapered nozzle)/
Approx. 215 g (excluding dry batteries)

Monitors

Monitors

Specifications
Detection target gas list
Detection target gas

Formaldehyde (HCHO)

Detection principle

Photoelectric photometry

Detection range
1 digit
Measurement time

TAB No. 008
0.000 - 0.400 ppm(Displayed “<0.01” below 0.015 ppm)
0.005 ppm
1,800 seconds (30 minutes)

TAB No. 009
0.00 - 1.00 ppm(Displayed “<0.02” below 0.02 ppm)
0.01 ppm
900 seconds (15 minutes)

Use TAB No. 008 (0 - 0.4 ppm) to detect formaldehyde in accordance with WHO indoor concentration guidelines (0.08 ppm/100 μg/m³ for
30-minute mean value).

-20 - +55 °C (no sudden fluctuations), 0 - 95 %RH (no condensation)

This product is intended for the detection of minute gas leaks, so gas concentration values are approximate.

20

FIXED GAS DETECTORS
Fixed Gas Monitoring Systems

System Configuration Examples

CONTENTS
Detectors

Multi Gas Detector for Semiconductor Factories GD-84D-EX Series 

23

Smart Transmitter/Gas Detector GD-70D Series 

25

C4F6/C5F8/COS Gas Detector TP-70DG II 

26

Transportable Gas Detector TP-70D/TP-70DG 

26

Gas Detector with Signal Converter SD-3 Series 

27

Combustible Gas/Toxic Gas Smart Transmitter/Gas Detector SD-1 Series 

29

Combustible Gas Smart Transmitter/Gas Detector SD-1RI 

29

Combustible Gas/Toxic Gas Smart Transmitter/Gas Detector SD-1GH 

29Hydrogen Sulfide/Carbon Monoxide Smart Transmitter/Gas Detector SD-1EC 

29Oxygen Smart Transmitter/Gas Detector SD-1OX 

29Oxygen Gas Detector Head GD-1OX 

30Flame-proof Furnace Gas Monitor GD-A2400 

31

SD-2500/SD-2600/SD-2700
Combustible Gas Detector Head GD-A80 Series

32

Flame-proof Suction Type Gas Detector (Direct Transmission Type)
GD-D58 Series 33

Flame-proof Suction Type Gas Detector (Signal Converter Type)SD-D58 Series 33

Flame-proof Pump Unit RP-D58 

33

Toxic Gas Detector Head GD-88 Series GD-K88Ai/GD-K88Di 

34

Oxygen Gas Detector Head GD-88 Series GD-F88Ai/GD-F88Di 

35

Oxygen Gas Detector Head GD-F3A-A/GD-F3A-SC-A 

36

Explosion-proof Calorimeter OHC-800 

37

Optical Interferometric Gas Monitor FI-900  

38

Optical Interferometric Gas Monitor FI-915 

38Highly Sensitive Toxic Gas Detector FP Series FP-300/FP-301 

39

C5F8/C4F6 Highly Sensitive Toxic Gas Detector FP Series FP-300AGZS 

40FP Series FP-270As 

40

Infrared Type Fluorocarbon/IPA Gas Detector RI Series RI-257 

41Transportable Infrared Gas Detector RI Series RI-557 

41

Infrared Type CO2 Monitor RI Series RI-215D 

42

Infrared Type CO2 Monitor CO2RK-Lite 

42

600 Series Indoor Oxygen Monitor OX-600 43

GD-F4A-A/GD-F4A-SC-A

Alarm units

43

Indoor CO2 Monitor RI-600 

43Installation example with an only gas detector
Standalone use of a smart transmitter/gas detector allows control ofa revolving light and external buzzer.
Smart transmitter/gas detector

Revolvinglight

Installation example with a gas detector and indicator/
alarm unit (single-point type)
A gas detector can be used in conjunction with an indicator/alarm
unit to enable concentrations to be monitored at a location a safe
distance away from the installation site.

External
buzzerSmart transmitter/gas detector

orGas
detector

Indicator/alarm unit
(single-point type)

or

Power
sourcePowersourceInstallation example with gas detectors and an indicator/alarm unit (multi-point type)Multiple gas detectors can be used in conjunction with an indicator/alarm unit to enable concentrations for gas detectors installed in different
locations to be checked from a single location.
Smart transmitter/gas detectors

Gas detectors

Indicator/alarm unit
(multi-point type)Installation example for centralized monitoring system with gas detectors and an indicator/alarm unit

Multi-Point Indicator/Alarm Unit RM-5000 Series/RM-590 Series 

44

Combustible Gas Detection Alarm System GP-147 

45

Single-Point Indicator/Alarm Unit RM-6000 Series 

46

Miscellaneous

Gas Detection Alarm System Riken Keiki Kanshiro II

47

Analyzers

Photoemission Yield Spectoscopy in Air AC-2S Series 

48

Photoemission Yield Spectoscopy in Air AC-5 

49

Photoemission Yield Spectoscopy in Air AC-3 

49

Photoelectron Spectrometer Optional Fermi Level Measuring Unit FAC-2 

50orPortable X-ray Diffractometer with a Fluorescent X-ray Analyzer DF-01 

50

PLC

Accessories

51

Marine Gas Detection Alarm Systems

52

Miscellaneous

21

Indoor Carbon Monoxide Monitor EC-600 

Gas monitoring systems include those that integrate a gas detector for detecting gas and an indicator/alarm unit for indicating gas
concentrations and issuing alarms into a single unit, and those that use a combination of gas detector(s) and an indicator/alarm unit.
Gas detectors are broadly divided into two types. One type consists of a smart transmitter/gas detector with a gas concentration display thatcan be used on its own.
This type of detector is used for checking local concentrations near the detector. They can also be used in conjunction with an indicator/
alarm unit to check gas concentrations from a safe distance from where the detector is located. The other type of gas detector does notinclude a gas concentration display and is used with an indicator/alarm unit. This type is used for checking concentrations in safe locations
only, and not at the location where the gas detector is located.
Furthermore, indicator/alarm units may be either single-point units, which use one indicator/alarm unit per gas detector, or multi-point units,
which are capable of monitoring a number of different gas detectors.
Systems can also be configured with centralized monitoring of signals output by various indicator/alarm units.

Gas concentrations detected by the gas detectors can be monitored
via an indicator/alarm unit using a centralized monitoring system. For
smart transmitter/gas detectors, systems can also be configured byincorporating a PLC within the centralized monitoring system without theneed for an indicator/alarm unit.
Smart transmitter/gas detectors

Indicator/alarm unit
(multi-point type)

Centralized monitoring system(Riken Keiki Kanshiro II)

Gas detector

22Integrates the functions of four earlier detectors into a single unit.
Main areas of use

GD-84D-EX

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Gas name• Features high performance pump.

Power lamp

Alarm setpoint

1st alarm lamp

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Series• Full-dot matrix LCD for legibility! Simultaneous four-component display

Electronics

2nd alarm lamp
Fault alarm lamp

Concentration

Detection target gases

Model: RP-80

MODE key
Concentration
bar
Units

Depends on sensor installed

Previous model
Model: RP-70▲ key

Non-explosion-proof▼ key

Features• Consolidating four detectors into a single unit cuts costs dramatically.

Reduced vibration Two diaphragms to cancel vibration

TEST/SET key

Flow rate

Surge prevention

Communication
status• Features high performance pump.

Buffer provided inside chamber

Smaller environmental Eliminates adhesives and bolts (andfootprintnuts) for easier recycling.

• Ethernet (PoE) support

Reduced noise

Revised valve configuration

Redundancy

Twin pump → Suction possible evenwith one failed pump

Maintenance indicator

Model

GD-84D-EX

Sampling method

Suction type

Detection principle

New ceramic type, semiconductor type, hot-wire semiconductor type, electrochemical typeGas alarm, fault alarm

Certification

CE marking

Power source

24 V DC ± 10 % (4 - 20 mA models)Approx. 1.9 kg (4 - 20 mA models, EA models)Operating temperaturerange-10 - +40 °C (no sudden fluctuations)Operating humidity
range

20 - 90 %RH (no condensation; may vary depending on the sensors installed.)

The F Series high-performance sensors
feature significantly improved selfdiagnostic functions. (See table at right.) In
addition to sensor types for the 18 different
major toxic gases, the lineup includes gas
sensors for 67 distinct combustible gases.
1/10 the size of previous sensors; newsensors also offer equivalent or superior
interference resistance.

Name

Applicableprinciples

Service life expiration warning

All principles

Degradation diagnostic warning(sensor output abnormality)

NCF
SHF
SGF

An alarm is issued when the value of the drift from the initial sensor output (in air) exceeds athreshold.

Degradation diagnostic warning(fluid shortage detection)

ESF

An alarm is issued when the fluid resistance between electrodes exceeds a threshold.

Life assessment warning

All principles

An alarm is issued when the span reserve estimated based on the calibration history approaches zero.

Vitality (span reserve)

All principles

The sensor reserve is displayed as 0 - 100 when a known concentration of gas is allowed to flow.

Details
An alarm is issued after three years from the start of use.

Miscellaneous

Miscellaneous

Approx. 150 mm (W) × 190 mm (H) × 146 mm (D) (4 - 20 mA models, EA models)(excluding projections)

Weight• Features next-generation high-performance (F Series) sensors.

Self-diagnostic functions

Alarm type

External dimensions

SHIFT key

Analyzers

Analyzers• Equipped with smart self-diagnostic functions

Specifications

Alarm units

Alarm units

Explosion-proof
Explosion-proof

Detectors

Detectors

Multi Gas Detector
for Semiconductor Factories

Lineup overview
Model
GD-84D-EX-ET-EC

Communication method
Ethernet only

Possible sensors

Power input

EC only

Sensor lineup

PoE only

GD-84D-EX-ET

Ethernet only

Also compatible with sensors other than EC

PoE only

GD-84D-EX-EA-EC

Combined Ethernet/4 - 20 mA

EC only

Combined PoE/24 V DC

GD-84D-EX-EA

Combined Ethernet/4 - 20 mA

Also compatible with sensors other than EC

Combined PoE/24 V DC

GD-84D-EX-EC

4 - 20 mA only

EC only

24 V DC

GD-84D-EX

4 - 20 mA only

Also compatible with sensors other than EC

24 V DCElectrochemical
type

Electrochemical type
(For oxygen)

Hot-wiresemiconductor
type

New ceramic type

Semiconductor
type

Detection target gas list: Electrochemical type (ESF)
Detection target gas
Display name
Detection range
Alarm setpoints
Acceptable concentration(ACGIH)
Detection target gas
Display name
Detection range
Alarm setpoints
Acceptable concentration(ACGIH)

Nitrogen dioxideNO2
0 - 15 ppm

Hydrogen chlorideHCL
0 - 6 ppm

AmmoniaNH3
0 - 75 ppm

Chlorine
CL2
0.0 - 0.3 ppm

OxygenO2
0 - 25 %PhosphinePH3
0 - 1 ppm

SilaneSiH4
0 - 15 ppm

Disilane
Si2H6
0 - 15 ppm

Sulfur dioxideSO2
0 - 6 ppm

5 ppm

2 ppm

25 ppm0.1 ppm

18 %0.3 ppm

5 ppm

5 ppm

2 ppm

0.2 ppm

2 ppm

25 ppm0.1 ppm—

0.05 ppm

5 ppm—

0.25 ppm

Nitrogen monoxideNO
0 - 100 ppm
25 ppmHydrogen bromide
HBr
0 - 6 ppm
2 ppm

Diethylamine
DEA
0 - 15 ppm
5 ppm

Dimethylamine
DMA
0 - 15 ppm
5 ppm

Ethylmethylamine
EMA
0 - 15 ppm
5 ppm

Fluorine
F2
0 - 3 ppm
1 ppm

Hydrogen fluoride
HF
0.0 - 1.5 ppm
0.5 ppm

Ozone
O3
0.0 - 0.6 ppm
0.2 ppm

Chlorine trifluoride
CLF3
0.0 - 0.3 ppm
0.1 ppm

25 ppm

2 ppm

5 ppm

5 ppm

5 ppm

0.1 ppm

0.5 ppm

0.2 ppm (< 2 h)

0.1 ppm

Detection target gas list: Hot-wire semiconductor type (SHF)

Detection target gas list: Semiconductor type (SGF)

Detection target gas

HFC-41 (CH3F)

HFC-32 (CH2F2)

Isopropyl alcohol

Deuterium

Hydrogen

Display name
Detection range

R-41
0 - 2,000 ppm
500 ppm
1,000 ppm

R-32
0 - 2,000 ppm
500 ppm
1,000 ppm

IPA
0 - 2,000 ppm
500 ppm
1,000 ppm

D2
0 - 2,000 ppm
500 ppm
1,000 ppm

H2
0 - 2,000 ppm
500 ppm
1,000 ppm——

200 ppm——

Alarm setpoints
Acceptable concentration(ACGIH)

Detection target gas
Display name
Detection range
Alarm setpoints
Acceptable concentration(ACGIH)

MethaneCarbonyl sulfide

CH4
0 - 2,000 ppm
500 ppm
1,000 ppm

COS
0 - 2,000 ppm
500 ppm
1,000 ppm

—

5 ppm

Detection target gas list: New ceramic type (NCF)
Detection target gas
Display name
Detection range
Alarm setpoints
LEL

MethaneCH4
0 - 100 %LEL
25 %LEL
50 %LEL
5.0 vol%HydrogenH2
0 - 100 %LEL
25 %LEL
50 %LEL
4.0 vol%

Isopropyl alcoholIPA
0 - 100 %LEL
25 %LEL
50 %LEL
2.0 vol%• Communication method

Ethernet (PoE) method

Analog 4 - 20 mA DC

The PoE HUB allows power supply via LAN cable, significantly reducing installation costs. It also allows
operators to view the operational status of the detector via a web browser.

Gas concentration data is output via a general instrumentation signal(4 - 20 mA DC). This allows greater flexibility in system configuration.

[User mode]
Enables checking/review of basic information such as
gas names and alarm setpoints, as well as alarm history
and communication history.

Pattern 1[Administrator mode]
Apart from check basic data, you can also change
settings for alarm setpoint values or the network, runcalibrations, alarm tests and fault alarm tests, reset
alarms, and set INHIBIT.
GD-84D-EX(Ethernet model)

Indicator/
alarm unit

Detector GD-84D-EX

Pattern 2
Switching hub
(PoE)

PC
PLC
PC

Ethernet cable

Monitoring
systemDetector GD-84D-EX* Certain restrictions apply regarding sensor combinations. For more information, contact RIKEN KEIKI. * Refer to “TLVs and Bels 2022” for concentrations accepted by the ACGIH (American Conference of Government Industrial Hygienists).
* For more information on other gases, contact RIKEN KEIKI.

23

24

Gas monitoring system for semiconductor, liquid crystal, and solar cell factories
Main areas of use

SeriesC4F6/C5F8/COS Gas Detector◆◆

Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue◆

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

TP-70DG II

Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Detectors

Detectors

Smart Transmitter/Gas Detector

GD-70D

Supports COS new TLV value of 5 ppm.

◆: For nitrous oxide detection

Detection target gases

Detection target gases

Depends on sensor installed

C4F6

Explosion-proof

Explosion-proof

Explosion-proof

Non-explosion-proof

Features
Specifications• Power consumption of just 20 % compared to previous models (electrochemical type)

Model

TP-70DG II• Uses reusable parts.

Sampling method

Suction type

• Allows recycling of constituent materials to reduce environmental impact.

Detection target gas

C4F6, C5F8, COS• Design complies with various international regulations.

Detection principle

Catalyst + electrochemical type

Detection range

0 - 5 ppm (C4F6, C5F8)
0 - 15 ppm (COS)

Alarm setpoints

1st: 2 ppm, 2nd: 4 ppm (C4F6, C5F8)
1st: 5 ppm, 2nd: 10 ppm (COS)

TP-70DG II

Model
Detection principle

Depends on sensor unit installed (same for all sensor units)

Communication
method4-20 mA DC (non-insulated, load resistance 300 Ω or less)*

Detection method

Pump suction type (0.5 L/min ± 10 %)• Incorporates a pyrolyzer containing catalyst to reduce

Character LCD (white backlight)
Digital and bar meter display: Gas concentration, alarm setpoints
Digital and character LCD: Flow rate, communication, pyrolyzer connection, units,
gas name, maintenance, inhibit, concentration

Display
Alarm indications

interference effects.
• Easy-to-replace sensor• Incorporates new intelligent sensor.
• Large character LCD for easy viewing• Features automatic flow adjustment function.

Alarm typeGas alarm, fault alarm

Alarm pattern

1st: ALM1 lamp flashing or lit (red), 2nd: ALM2 lamp flashing or lit (red)Certification

CE marking

Power source

100 - 240 V AC ± 10 %, 50/60 Hz

External dimensions

Approx. 180 mm (W) × 225 mm (H) × 285 mm (D) (excluding projections)

WeightMiscellaneous

Miscellaneous

For nitrous oxide detection

Features

GD-70D

Analyzers

Analyzers• Uses universal design independent of detection principle to allow shared use of the main unit.

Specifications

Approx. 6.0 kg

Operating temperature
range+20 - 40 °C (no sudden fluctuations)Operating humidity
range

40 - 70 %RH (no condensation)

First alarm: Red LED Second alarm: Red LED Fault alarm: Yellow LED, fault detail display

External output

Gas concentration signal Gas alarm contact, fault alarm contact

Self-diagnostic
functions

System abnormality, sensor abnormality, flow abnormality, communication abnormality,
pyrolyzer unit abnormality

Data logger functions

Event history, calibration history, alarm trend history

Operating temperaturerange

0 - +40 °C (no sudden fluctuations)30 - 70 %RH (no condensation)* May vary depending on the sensors installed.

Settings/operations

Performed using the front panel of the main unit

TP-70D
TP-70DG

CE marking

Power source

24 V DC ± 10 %External dimensions

Approx. 70 mm (W) × 120 mm (H) × 145 mm (D) (excluding projections)

WeightFor detecting special material gas leaks and monitoring environments inside factories
Transportable Gas Detector

Operating humidity
range
Certification

Approx. 0.9 kg (including sensor)* For information on other communication methods, please contact Riken Keiki.

Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases
Depends on sensor installed

Explosion-proof

Detection target gas list

Explosion-proof

Detection target gas
Display name
Detection range
Alarm setpoints
Acceptable concentration(ACGIH)

PhosphinePH3
0 - 1 ppm
0.3 ppm

Diborane
B2H6
0.0 - 0.3 ppm
0.1 ppm

SilaneSiH4
0 - 15 ppm
5 ppm

Nitrogen trifluoride
NF3
0 - 30 ppm
10 ppmHydrogen chlorideHCl
0 - 6 ppm
2 ppm

Hydrogen fluoride
HF
0.0 - 1.5 ppm
0.5 ppm

TetraethoxysilaneTEOS
0 - 15 ppm
10 ppmHydrogen bromide
HBr
0 - 6 ppm
2 ppm

Chlorine
Cl2
0.0 - 1.5 ppm
0.5 ppm

Fluorine
F2
0 - 3 ppm
1 ppm

0.05 ppm

0.1 ppm

5 ppm

10 ppm2 ppm

0.5 ppm

10 ppm2 ppm

0.1 ppm

0.1 ppm

Detection target gas
Display name
Detection range
Alarm setpoints
Acceptable concentration(ACGIH)

Chlorine trifluoride
ClF3
0.0 - 0.3 ppm
0.1 ppm

Ozone
O3
0.0 - 0.6 ppm
0.2 ppm

Nitrogen monoxideNO
0 - 100 ppm
25 ppmArsineAsH3
0 - 50 ppb
10 ppbCarbon monoxideCO0 - 75 ppm
25 ppmAmmoniaNH3
0 - 75 ppm
25 ppmDisilane
Si2H6
0 - 15 ppm
5 ppm

GermaneGeH4
0.0 - 0.8 ppm
0.2 ppm

Hydrogen selenide
H2Se
0.0 - 0.2 ppm
0.05 ppm

BromineBr2
0 - 1 ppm
0.3 ppm

0.1 ppm

0.1 ppm

25 ppm5 ppb

25 ppm25 ppm—0.2 ppm

0.05 ppm

0.1 ppm

Detection target gas
Display name
Detection range
Alarm setpoints
Acceptable concentration(ACGIH)

Nitrogen dioxideNO2
0 - 9 ppm
3 ppm

Sulfur dioxideSO2
0 - 6 ppm
2 ppm

Monomethylamine
MMtA
0 - 15 ppm
5 ppm

Dimethylamine
DMA
0 - 15 ppm
5 ppm

Trimethylamine
TMA
0 - 15 ppm
5 ppm

Diethylamine
DEA
0 - 15 ppm
5 ppm

OxygenO2
0 - 25 vol%18 vol%HydrogenH2
0 - 2,000 ppm
500 ppm

Nitrous oxide
N2O
0 - 500 ppm
50 ppmHydrogen cyanideHCN
0 - 15 ppm
4 ppm

0.2 ppm

0.25 ppm

5 ppm

5 ppm

5 ppm

5 ppm

—

—

50 ppm

4.7 ppm* Refer to “TLVs and BEIs 2022” for concentrations accepted by the ACGIH (American Conference of Government Industrial Hygienists). * For more information on other gases, contact Riken Keiki.

Non-explosion-proof

Specifications
Model

TP-70D

TP-70DG

Sampling method

Pump suction type

Detection target gas

Depends on sensor unit installed

NF3

Detection principle

Catalytic combustion type, semiconductor type,non-dispersive infrared type, electrochemical type,galvanic cell type

Electrochemical type + pyrolysis type

Concentration display

Character LCD (digital and bar meter display)

Alarm typeGas alarm, fault alarm

Alarm pattern

1st: ALM1 lamp flashing or lit (red), intermittent buzzer sounding
2nd: ALM2 lamp flashing or lit (red), intermittent buzzer sounding

Power source
Power consumption

Features• Gas type can be changed by replacing the sensor.
• Large character LCD for easy viewing• Automatic flow adjustment function reduces work in daily

maintenance.

25

Alarm units

Alarm units

Explosion-proof
Non-explosion-proof

COS

C5F8

External dimensions
WeightOperating temperature
range
Operating humidity
range

100 - 240 V AC ± 10 %, 50/60 Hz
Approx. 12 VA (max. 20 VA)* May vary depending on the sensors installed.

Approx. 40 VA (max. 45 VA)

Approx. 160 mm (W) × 210 mm (H) × 260 mm (D) (excluding projections)
Approx. 4.3 kg

Approx. 5.4 kg
0 - +40 °C (no sudden fluctuations)30 - 70 %RH (no condensation)* May vary depending on the sensors installed.

30 - 70 %RH (no condensation)

26

Features next-generation high-performance sensors; compliant with various global standards

SD-3

SeriesElectronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous• Features the next-generation high-performance F Sensors.

• Wide range of types to suit a variety of uses and installation environments• Three-year sensor warranty * Except for certain sensors Assumes sensor is inspected at least once a year.

The SD-3 Series lineup includes diffusion type, suction type, remote type, and duct insertion
type models. Select the optimal detection method to suit specific uses.

• Operating temperature range: -40 - +70 °C * Except for certain sensors• IIEC/EN performance compliance scheduled * Except for certain sensors

Detectors

Detectors

Main areas of use
Gas Detector with Signal Converter				• Includes sensor degradation and life assessment function.

[Remote type/Duct insertion type]

Detection target gases

Alarm units

Explosion-proof
Non-explosion-proof

Blue

Features* Compatible models: SD-3ECB, SD-3DECB, GD-3ECB• Incorporates newly developed “F sensor” for improved functionality and performance.

Double range capability (NC type)Double ranges in the form of low concentration (ppm) and lower explosive limit (LEL) can bedetected with a single device.

• Complies with different global standards (including planned certifications).
• Wide range of output options

Specifications
SD-3DRI

Detection target gas
Display
Sampling method
Set flow rate
Gas alarm type
Fault alarm/self-diagnosis
Warnings
Gas concentration Standard
outputOptionContact output (optional)
Power source
Power consumption
Cable connectors
Operating temperature/humidity range
Housing material
Protection level

SD-3GH

SD-3GHS

SD-3SP

SD-3EC

SD-3ECS

SD-3ECB

SD-3DNC

SD-3DGH

SD-3DGHS

SD-3DSP

SD-3DEC

SD-3DECS

SD-3DECB

New ceramic type

Explosion-proof construction

Flame-proof enclosure
Ex db IIC
Ex db IIC
T6/T5 Gb
T5/T4 Gb
II 2G Ex db IIC
II 2G Ex db IIC
T6/T5 Gb
T5/T4 Gb
SIL2 compliant (SIL3 compliant withredundancy)

Ex db IIC
T6/T4 Gb
II 2G Ex db IIC
T6/T4 Gb

Ex db IIC
T5/T4 Gb
II 2G Ex db IIC
T5/T4 Gb−

CE Marking (ATEX Directive, EMC Directive, RoHS Directive),
SIL2 Certification (IEC 61508), MED Certification*, HART communication

Ex db IIC
T4 Gb
II 2G Ex db IIC
T4 Gb
SIL2 compliant(SIL3 compliant with redundancy)• Order information

Flame-proof enclosure+ Intrinsically safe explosionproof construction
Ex db ia IIC
T4 Gb
II 2G Ex db ia IIC
T4 Gb
Pending① Diffusion type/suction type selection
Blank
D

0

Single range

Suction type (introduced via an external unit)1

SIL (selectable with RI/NC/EC/ECS only)1

Double range + 4-16 (selectable with NC only)2

Double range + L4-20 (selectable with NC only)

3

Double range + H4-20 (selectable with NC only)② Sensor type selection

Non-dispersive infrared type

0

N/A

NC

New ceramic type1—

SD-3GH

SD-3DGH

SD-3GHS

SD-3DGHS

SD-3SP

SD-3DSP

SD-3EC

SD-3DEC

SD-3ECS

SD-3DECS

SD-3ECB

SD-3DECB

Sampling method

Diffusion
type

Suctiontype

Diffusion
type

Suctiontype

Diffusion
type

Suctiontype

Diffusion
type

Suctiontype

Diffusion
type

Suctiontype

Diffusion
type

Suctiontype

Diffusion
type

Suctiontype

Diffusion
type

Suctiontype

Detection principle

IRF: Non-dispersive
infrared type

NCF: New ceramic type

〇

〇

〇
〇

SHF: Hot-wiresemiconductor type

ESF: Electrochemical typeGH

Semiconductor type

2

—

0

4 - 20 mA with HART

Semiconductor type + sintered metal (selectablewith CS2 only)

3

—

1

4 - 20 mA with HART + contact (3c)SP

Hot-wire semiconductor type〇
CS2 (carbon disulfide) only

* Differs depending on detection target gas. For more information, refer to the F sensor list on page 5 of the product-specific catalog.

〇

〇

〇

〇
H2S (hydrogen sulfide) only

③ Cable connectors (See diagram on right.)
0Connector 1 + Connector 2

1

Connector 1 + Connector 2 + Connector 4 +Connector 5④ Explosion-proof〇〇
With EC barrier*⑧ Output type selection

GHS

Electrochemical type + barrier (selectable withgases other than CO/O2/H2S)

SD-3DNC⑥ Performance certification

RI

ECB

SD-3NC⑦ Range setting*2

N/A

List of detection target gases by model
SD-3DRI⑤ Functional safety IEC 61508*1

GD-3 ②0ECS

SD-3RI

SD-3SC ( ③ ④ ⑤ 0 ⑦ ⑧ )Diffusion type

Electrochemical type (selectable with CO/O2 only)

Model

Explosion-proof
application type

[Remote type: Main unit (SD-3SC) Sensor unit GD-3 Series]

SD-3 ① ② ( ③ ④ ⑤ 0 ⑦ ⑧ )Electrochemical type + sintered metal (selectablewith H2S only)

HART7

SGF: Semiconductor type

With splash guard
fittedWith sunshadefittedMaximum 3.1 W

EC

HART communication

27

Miscellaneous

splash guard, lightning arrester (Japan Ex not supported), various filters, etc.

* Select SIL certified external units when used in conjunction with suction types. For information on target gases, refer to the F sensor list on page 5 of the product-specific catalog.

〇

IEC/EN performance*
Combustible gas: IEC/EN 60079-29-1
Toxic gas: EN 45544-2Oxygen: EN 50104* Japan Ex rang: -20 - +70 °C

Approx. 7.6 kg

Combustible
Detection gas
targetOxygengas
Toxic gas
Remarks

Performance• Extensive range of optional accessories: Protective cover,

Approx. 7.0 kg

Functional safety IEC 61508*

Explosion-proof certifications
IECEx/ATEX, Japan Ex, FM/cFM*
in different countries• Supports wide range of operating temperatures (-40 - +70 °C)

Suction type

Approx. 171 mm (W) × 289 mm (H) × 127 mm (D)ATEX

The SD-3 Series also supports Modbus (RS-485) communication in addition to 4 - 20 mA
output with HART communication (support planned). Three relay contacts are also available(ALARM1, ALARM2, and FAULT). Select any of the following three types to suit specific uses:① 4 - 20 mA signal with HART communication [standard]② 4 - 20 mA signal with HART communication + contact (3c) [optional]③ 4 - 20 mA signal + Modbus (RS-485) communication [optional; future support planned]• Protection level equivalent to IP66/67

Approx. 6.7 kg

Explosion-proof
certifications• Compliant with various global standards• Housing material: SCS14 stainless steel (equivalent to SUS316)

Diffusion type

Approx. 171 mm (W) × 277 mm (H) × 127 mm (D)

IECEx• Wide range of output options• Rugged housing construction allows use even in harsh environments.

Approx. 171 mm (W) ×
322 mm (H) × 127 mm (D)Approx. 171 mm (W) ×
334 mm (H) × 127 mm (D)Approx. 7.3 kg

External
Diffusion type
dimensions(excluding cablegland projections) Suction type
Weight(excluding cableglands)Splash guard(sensor part)

Semiconductor type

SPDT (2 alarms, 1 fault output operation), 250 V AC 2 A, 30 V DC 1 A (resistance load), minimum load 5 V DC 0.1 A
24 V DC (18 V - 30 V DC)
Maximum 4.5 W
Maximum 3.5 W
Maximum 2.8 W
IECEx/ATEX: M25 × 1.5, adapters (option): NPT3/4, NPT1/2, M20 × 1.5
IECEx/ATEX: -40 - +70 °C (no sudden fluctuations), 0 - 95 %RH (no condensation)
In accordance with sensor specifications if restrictions apply due to sensor specifications
SCS14 stainless steel (equivalent to SUS316)
IP66/67 equivalent

Maximum 3.8 W

Intrinsically safe
explosion-proof barrier* Pending or due to be certified

Hot-wire
Electrochemical typesemiconductor typeCombustible gas/toxic gas/oxygen; detection range depends on detection target gas.
7-segment LED (5 digits) and 3-color lamps (red/green/yellow)
Diffusion/Suction (introduced via an external unit)
0.4 - 1.5 L/min
Two-step alarm (H-HH or H-L or L-LL)
System abnormality (E-9)/sensor abnormality (E-1)
Sensor life assessment/clock abnormality diagnosis/communication diagnosis/sensor warning
Gas concentration output (4 - 20 mA with HART), 4 - 20 mA DC (non-insulated, linear output), load resistance 600 Ω or less, maximum resolution 250 divisions(Depends on specifications.)
RS-485 (half duplex)

Non-dispersive
infrared type

Calibration gas inlet

Miscellaneous

Miscellaneous

Suction type

Detection principle

SD-3NC

SD-3RI[Duct insertion type]

Analyzers

Analyzers

SilverDiffusion type

[Remotetype]• Wide range of types to suit a variety of uses and installation environments

Nameplate color: Red

Model[Suctiontype]* Not compatible with HART communication* Not SIL compliant• Rugged housing construction allows use even in harsh environments.

Yellow[Diffusion
type]

Alarm units

Devices in the SD-3EC Series lineup feature an intrinsicallysafe explosion-proof barrier integral construction (flameproof enclosure + intrinsically safe explosion-proof
construction). This eliminates the need for sintered metal in
the sensor and allows detection of a wide range of highly
adsorptive toxic gases.

Depends on sensor installed

Explosion-proof

Use a remote sensor to allow sensor installation up to 20 m from the detector main unit. An
optional duct mount kit (sold separately) can be used for insertion inside a duct.

Compatible with a wide range of toxic gases

1

IECEx/ATEX

2

—

3

Japan Ex

4—

2
Connector 3 * Not used

Connector 2Connector 4Standard

OptionConnector 1

Connector 5Standard

OptionExample: Cable connectors—*1: Double range is not available when SIL is
selected.
*2: HART communication is not available whendouble range (optional) is selected.

* Connectors must always be blanked off with blanking plugs (soldseparately) when not in use.

28

Standard type smart transmitter/gas detector
Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

SD-1

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Series

Detection target gases
Combustible gas(SD-1/SD-1GH, SD-1RI)

Hydrogen sulfide (SD-1EC)

Toxic gas(SD-1GH, SD-1EC)

Carbon monoxide (SD-1EC)

SD-1 D TYPE GP-AS

The main unit can be operatedusing control keys (magnets) without
the need to open or close the unit.
This ensures safe operation even in
explosion-proof areas.

Detection method

Suction method

Without D: Diffusion type
With D: Suction type

Without -AS: Pump suction
With -AS: Aspirator suction

MENU/ESC key

▲ key

SET
key

▼ key

• Connection examples(SD-1OX)

Explosion-proof
Explosion-proof• Simple operation by just assigning control keys

Detection principle

3-core cables are used for the power supply (24 V DC) and gas concentration signal (4 - 20 mA

TYPE GP: Catalytic combustion type
TYPE NC: New ceramic typeDC) connection cables. 5-core cables are used for contact output.

GH: Semiconductor type

Monitoring system

OX: Galvanic cell type

Indicator/alarm unit
RM-5000 Series

SD-1

EC: Electrochemical typeFeatures■ Connection example with an indicator/alarm unit

■ Connection example with an alarm monitoring
systemRI: Non-dispersive infrared typeNon-explosion-proof

Alarm units

Alarm units

OxygenThe detection target gases will vary depending on the particular model (sensors installed).

• SD-1 Series models

Detectors

Detectors

Combustible Gas/Toxic Gas
Smart Transmitter/Gas Detector

SD-1

PLC etc.

• Explosion-proof class Ex d II C T5/6 X certified, allowing use in hydrogen and acetylene atmospheres

4 - 20 mA DC• Compatible with a broad range of measurement environment and measurement range requirements• Supports external output 4 - 20 mA with HART.

Analyzers

Analyzers• Simple operation by just assigning dedicated control keys

CVVS 2-core

24 V DCCVVS 1.25mm2, 3-core, max. 1.25 km or
CVVS 2.0 mm2, 3-core, max. 2.0 km

CVVS 3-core

Combustible Gas
Smart Transmitter/Gas Detector

Hydrogen Sulfide/Carbon Monoxide
Smart Transmitter/Gas Detector

SD-1EC

Usable even in hazardous atmospheres with hydrogen and acetylene present

OxygenSmart Transmitter/Gas Detector

Combustible Gas/Toxic Gas
Smart Transmitter/Gas Detector

SD-1OX

SD-1GH

Miscellaneous

Miscellaneous

SD-1RI

Oxygen Gas Detector Head

Main areas of use

GD-1OXElectronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases
OxygenSpecifications

Explosion-proof

Model
TYPE

SD-1
TYPE GPTYPE NC

SD-1RI

SD-1GH

SD-1EC

SD-1OX----

Combustible gas or toxic gas

CO, H2SO2Semiconductor type

Electrochemical type

Galvanic cell type

Sampling method

Combined suction/diffusion

Detection target gas

Combustible gas

Detection principle

Catalytic
combustion type

Detection range

0 - 100 %LEL

New ceramic typeNon-dispersive infrared type

Alarm setpoints

Depends on detection target gas.

Alarm type
Alarm pattern

Flame-proof enclosure
IECEx: Ex db II C T5 Gb
ATEX: II 2G EX db II C T5 Gb

IECEx: Ex db II C T6 Gb
ATEX: II 2G EX db II C T6 Gb

WeightIECEx: Ex db II C T6 Gb
ATEX: II 2G Ex db II C T6 Gb

Features• Oxygen concentration monitoring/general disaster prevention systems for civil engineering work inutility tunnels, underground, etc.

• Oxygen concentration monitoring during tank washing/cleaning• Oxygen concentration measurement/monitoring in enclosed spaces• Oxygen concentration measurement/monitoring in inert gas

IECEx, ATEX, China Ex, Taiwan Ex,
Japan Ex, MED, SIL, CE marking

Approx. 148 mm (W) × 167 mm (H) × 88 mm (D) (excluding projections)

Approx. 148 mm (W) × 203 mm (H) ×88 mm (D) (excluding projections)

Approx. 148 mm (W) × 208 mm (H) ×88 mm (D) (excluding projections)

Approx. 2.0 kg

Approx. 2.2 kg

Approx. 2.5 kg

IECEx, ATEX, China Ex, Taiwan Ex,
Japan Ex, CE marking
24 V DC ± 10 %Operating temperature
range-20 - +53 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)

Specifications
Model
Sampling method

IECEx, ATEX, China Ex, Taiwan Ex,
Japan Ex, SIL, CE marking

IECEx, ATEX, Taiwan Ex, Japan Ex, SIL,
CE marking

Power source
External dimensions

IECEx: Ex db II C T5 Gb
ATEX: II 2G EX db II C T5 Gb
IP65 equivalent

IECEx, ATEX, China Ex, Taiwan Ex,
Japan Ex, MED, CE marking

Non-explosion-proof

Fault alarm: FAULT lamp lit (yellow)/detail display

Protection level
Certifications

Depends on detection range.

Gas alarm, fault alarm
Gas alarm: ALM lamp lit (red)Explosion-proof
construction
Explosion-proof class

0 - 5 vol%, 0 - 10 vol%, 0 - 25 vol%,0 - 50 vol%, 0 - 100 vol%Depends on detection target gas.

Explosion-proof

Detection target gas

O2

Detection principle

Galvanic cell type

Alarm type

-10 - +40 °C (no sudden fluctuations)30 - 80 %RH (no condensation)

0 - 95 %RH (no condensation)

Depends on indicator used in combination.

Explosion-proof
construction

Flame-proof enclosure

Explosion-proof class

Japan Ex: Ex d II C T6 X

Protection level

IP65 equivalent

Certification

Japan ExPower source

Supplied from each indicator unit

External dimensions
Weight29

GD-1OX
Combined suction/diffusion

Approx. 148 mm (W) × 208 mm (H) × 88 mm (D) (excluding projections)
Approx. 2.5 kg

Operating temperaturerange-10 - +40 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)

30

Direct insertion type for accurate concentration detection inside ductsStandard type explosion-proof gas detector

Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

GD-A80

SeriesElectronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases

Detection target gases

Combustible gas

Combustible gas

Explosion-proof

Explosion-proof

Explosion-proof

Explosion-proof

Non-explosion-proof

The detection target gases will vary depending on the particular model (sensors installed).

Toxic gas

Alarm units

Alarm units

GD-A2400
SD-2500
SD-2600
SD-2700

Main areas of use

Combustible Gas Detector Head

Non-explosion-proof

FeaturesFeatures• Capable of detecting high boiling point solvents• Capable of detecting combustible gases and toxic gases within various detection ranges• Direct furnace interior insertion type for accurate concentration measurements in the middle of• Explosion-proof class Ex db II C T4 Gb allows use even in hydrogen and acetylene atmospheres.

Installation state
Duct interior• Support for suction type and aspirator suction type operations (* Requires a pump unit and power supply[available separately].)• The GD-A80-70 can be used in hot environments up to 70 °C.

Type list:
GD-A80 (catalytic combustion type, new ceramic type)
GD-A80V (semiconductor type)
GD-A80S (hot-wire semiconductor type)
GD-A80N (thermal conductivity type)
GD-A80-70 (catalytic combustion type)

GD-A80Gas concentration
high

Model

GD-A80, GD-A80V, GD-A80-70, etc.

Sampling method

Diffusion type

Detection principle

Refer to type list.

Alarm type

Depends on indicator used in combination.

Explosion-proof
construction

Flame-proof enclosure
IECEx: Ex db II C T4 Gb
ATEX: II 2G Ex db II C T4 Gb

Explosion-proof class

250 mm furnace interior insertion unit
allows detection in the center where gas
concentrations are highest.

Gas

GD-A80V

Protection level

IP67 equivalent

Certifications

IECEx, ATEX, Japan Ex, CE marking

Power source

Supplied from indicator/alarm unit

External dimensions

Specifications
Model

SD-2500

SD-2600

Sampling method

Duct insertion type, direct furnace interior insertion type

Detection target gas

Combustible gas

Detection principle

Catalytic combustion type

Detection range
Alarm type

External dimensions

Flame-proof enclosure-20 - +53 °C (no sudden fluctuations)[GD-A80-70: -40 - +70 °C (no sudden fluctuations)]

Operating humidityrange

0 - 95 %RH (no condensation)

Non-explosion-proof construction
IECEx: Ex db II C T2 Gb
ATEX: II 2G Ex db II C T2 Gb

IECEx: Ex db II C T3 Gb
ATEX: II 2G Ex db II C T3 Gb
IECEx, ATEX, China Ex, UL, Japan Ex, CE marking—

Indicator/alarm unit - detector connection example—

Supplied from indicator/alarm unit

24 V DC ± 10 %Approx. 148 mm (W) × 167 mm (H) × 458 mm (D) (excluding projections)* Including Ø34 mm × 250 mm furnace interior insertion unit

WeightOperating temperature
range

Approx. 1.0 kg

Operating temperature
range

Gas alarm, fault alarm

Certifications
Power source

SD-2700

0 - 100 %LEL—

Explosion-proof
construction
Explosion-proof class

Approx. 78 mm (W) × 163 mm (H) × 105 mm (D) (excluding projections)

WeightGD-A2400

Miscellaneous

MiscellaneousSpecifications

Gas concentration
low

Analyzers

Analyzers

exhaust duct interiors• Integral main unit and display unit construction eliminates the need for a dedicated indicator unit.
SD-2500/SD-2600• Simple operation by just assigning control keys
• Ideal for measuring gas concentrations inside drying facilities and exhaust ducts• Explosion-proof certification temperature range (0 - +160 °C) GD-A2400, SD-2500(0 - +200 °C) SD-2600• Can be used at 200 °C or above (operating temperature range 0 - 250 °C). SD-2700

Detectors

Detectors

Flame-proof Furnace Gas Monitor

Approx. 4.6 kg
Furnace interior insertion unit: 0 - +160 °C (no sudden fluctuations)
Main unit case ambient temperature: 0 - +50 °C (no sudden fluctuations)

Furnace interior insertion unit: 0 - +200 °C(no sudden fluctuations)
Main unit case ambient temperature:
0 - +50 °C(no sudden fluctuations)

Furnace interior insertion unit: 0 - +250 °C(no sudden fluctuations)
Main unit case ambient temperature:
0 - +50 °C(no sudden fluctuations)

RM-6000 Series

RM-5000 Series
Single case

CVV 4-core(Varies depending on
model.)
GD-A80 Series

RM-5000 SeriesMulti-caseCan be connected to the corresponding detector for the target gas.

31

32

Equipped with high-capacity suction pump

Intrinsically safe explosion-proof construction 2-wire toxic gas detector
Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

GD-D58Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

SeriesMiscellaneous

Toxic Gas Detector Head

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases
Combustible gas

The detection target gases will vary depending on the particular model (sensors installed).

Toxic gas

Explosion-proof

SeriesGD-K88Ai
GD-K88Di

Non-explosion-proof

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases

The detection target gases will vary depending on the sensors installed.

Toxic gas

Explosion-proof
Explosion-proof

Non-explosion-proof

Features• Can be used as explosion-proof products even in hydrogen atmospheres.

• Two-wire gas detector: Allows direct transmission to control system.

• Equipped with automatic flow rate abnormality detection function• Corrosive gas resistant enclosure: SUS enclosure available upon customer request• Integrated assemblies of replacement parts for improved maintainability• Intrinsically safe explosion-proof construction combined with safety barrier• Dust-proof/waterproof enclosure (IP67 equivalent)• Built-in aspirator (optional) GD-K88Di• Can be maintained by one person. SD-D58 Series only

• Supports output with HART.

Specifications

Specifications

Analyzers

Analyzers

Features

GD-D58 · AC
GD-K88Ai

Suction type

Sampling method

Diffusion type

Flame-proof Suction Type Gas Detector(Signal Converter Type)

Detection principle

Catalytic combustion type, new ceramic type, semiconductor type, hot-wire semiconductor type,thermal conductivity type

Detection principle

Electrochemical type

Detection range

Depends on detection target gas.

Detection range

Depends on detection target gas.

Alarm setpoints

Depends on detection target gas.

Alarm setpoints

Depends on detection target gas.

Alarm type

MiscellaneousSD-D58

SeriesGas alarm, fault alarm

Alarm pattern

Alarm message (AL1/AL2) display

GD-D58, GD-D58 · GH, etc.

SD-D58, SD-D58 · GH, etc.

Alarm type

Fault alarm

Gas alarm, fault alarm

Alarm patternFault alarm: FAULT lamp lit (yellow)/detail display

Gas alarm: ALM lamp lit (red)Fault alarm: FAULT lamp lit (yellow)/detail display

Explosion-proof
construction
Explosion-proof class

Flame-proof enclosure
ATEX: II 2G Ex db h II B+H2 T4 Gb
IP67 equivalent

Certifications

ATEX, China Ex, Taiwan Ex, Japan Ex, CE marking

External dimensions
Weight100 - 110 V AC ± 10 %, 50/60 Hz or
24 V DC ± 10 %100 V AC or 24 V DC ± 10 %Refer to Page 35.

For oxygen detection

Approx. 197 mm (W) × 292 mm (H) × 140 mm (D) Approx. 197 mm (W) × 292 mm (H) × 140 mm (D)(excluding projections)(excluding projections)
Approx. 5.8 kg

Operatingtemperature range

AC model: -20 - +50 °C (no sudden fluctuations)
DC model: -20 - +53 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)

Flame-proof Pump Unit

Features• Can be used as explosion-proof products even inhydrogen atmospheres.
• Equipped with automatic flow rate abnormality detection
function• Integrated assemblies of replacement parts for improved
maintainability• Dust-proof/waterproof enclosure (IP67 equivalent)

RP-D58Fault alarm

Alarm patternFault alarm: FAULT lamp lit (yellow)/detail display

Explosion-proof
construction

Flame-proof enclosure

IP67 equivalent

Certifications

ATEX, Taiwan Ex, Japan Ex, CE marking

Power source

100 V - 110 V AC, 50/60 Hz
24 V DC ± 10 %WeightApprox. 100 mm (W) × 241 mm (H) × 48 mm (D)Approx. 1.0 kg

Operating temperaturerange

0 - +40 °C (no sudden fluctuations; may vary depending on the sensors installed.)

Operating humidity
range

30 - 70 %RH (no condensation; may vary depending on the sensors installed.)

Model

GD-K88Di

Sampling method

Suction type

Detection principle

Electrochemical type

Detection range

Depends on detection target gas.

Alarm setpoints

Depends on detection target gas.

Alarm typeGas alarm, fault alarm

Alarm pattern

Alarm message (AL1/AL2) display

Japan ExPower source

24 V DC ± 10 %WeightGD-K88Di

Intrinsically safe explosion-proof construction
Japan Ex: Ex ia II C T4 Ga (when using safety barrier)Certification
External dimensions

ATEX: II 2G Ex db h II B+H2 T4 Gb

Protection level

External dimensions

WeightExplosion-proof class

Suction type

Alarm type

Explosion-proof class

24 V DC ± 10 %Explosion-proof
construction

Specifications
Sampling method

Japan ExPower source

Specifications

SD-D58 · ACModelIntrinsically safe explosion-proof construction
Japan Ex: Ex ia II C T4 Ga (when using safety barrier)Certification
External dimensions* For information on other communication methods, please contact Riken Keiki.

RP-D58

Explosion-proof
construction
Explosion-proof classProtection level

Power source

GD-K88Ai

Miscellaneous

Model

Sampling method

Model

33

Electronics
Firefighting and rescue

Alarm units

Alarm units

Explosion-proof

GD-88

Main areas of use
Detectors

Detectors

Flame-proof Suction Type Gas Detector(Direct Transmission Type)Approx. 220 mm (W) × 265 mm (H) × 90 mm (D)Approx. 2.6 kg

Operating temperaturerange

0 - +40 °C (no sudden fluctuations; may vary depending on the sensors installed.)

Operating humidity
range

30 - 70 %RH (no condensation; may vary depending on the sensors installed.)

Approx. 197 mm (W) × 292 mm (H) × 140 mm (D) (excluding projections)
Approx. 5.8 kg

Operating temperature
range

AC model: -20 - +50 °C (no sudden fluctuations)
DC model: -20 - +53 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)

Refer to Page 35.

For oxygen detection

34

Intrinsically safe explosion-proof construction 2-wire oxygen detector

GD-88

SeriesElectronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases
OxygenExplosion-proof
Explosion-proof

Non-explosion-proof

Features

GD-F3A-A
GD-F3A-SC-A
GD-F4A-A
GD-F4A-SC-A

Miscellaneous

Detection target gases
OxygenExplosion-proof
Explosion-proof

Non-explosion-proof

Features• Splash-proof construction allows installation even outdoors.
• Diffusion-type GD-F3A-A base with addition of suction flow paths GD-F4A-A/GD-F4A-SC-A• Intrinsically safe explosion-proof construction combined with safety barrier• The GD-F3A-SC-A incorporates a 4 - 20 mA transmission signal converter for easy installation andlong-distance transmission (up to 2.0 km).

• Supports output with HART.

• The GD-F4A-SC-A uses 4 - 20 mA transmission for long-distance transmission (up to 2.0 km).

Specifications

Specifications

Model

GD-F88Ai

Model

Sampling method

Diffusion type

Sampling method

GD-F3A-A

GD-F3A-SC-A
Diffusion type

Detection target gas

O2

Detection target gas

O2

Detection principle

Galvanic cell type

Detection principle

Galvanic cell type

Detection range

0 - 5 vol%, 0 - 10 vol%, 0 - 25 vol%Detection range

0 - 25 vol%Alarm setpoints

Depends on detection range.

Explosion-proof
construction

Alarm typeGas alarm, fault alarm

Alarm pattern

Alarm message (AL1/AL2) display

Explosion-proof
construction

Intrinsically safe explosion-proof construction

External dimensions
WeightExplosion-proof class

Japan Ex: Ex ia II C T4 Ga (when using safety barrier)Approx. 1 kg

Operating temperaturerange-10 - +40 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)

Japan Ex, CE marking (GD-F3A-A)

Power source

24 V DC (Supplied from indicator/alarm unit)

External dimensions

24 V DC ± 10 %Approx. 100 mm (W) × 241 mm (H) × 48 mm (D)WeightDetection method by model
Model

Sampling method

GD-F3A-A

Detector signal

Intrinsically safe explosion-proof construction
Japan Ex: Ex ia II C T4 X (when using Zener barrier)Certifications
Detector signal

Japan ExSpecifications

Direct sensor output signal

Current signal (4 - 20 mA DC)

Approx. 140 mm (W) × 175 mm (H) × 86 mm (D)Approx. 140 mm (W) × 175 mm (H) × 95 mm (D)Approx. 1.4 kg

Approx. 1.6 kg

Operating temperaturerange-10 - +40 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)

Direct sensor output signal
Diffusion type

GD-F3A-SC-A

Current signal (4 - 20 mA DC)

Specifications

GD-F4A-A

Direct sensor output signal

Model

Suction type
GD-F4A-SC-A

Current signal (4 - 20 mA DC)

GD-F4A-A

GD-F4A-SC-A

Sampling method

Suction typeModel

GD-F88Di

Detection target gas

O2

Sampling method

Suction type

Detection principle

Galvanic cell type

Detection target gas

O2
Galvanic cell type

Explosion-proof
construction

Intrinsically safe explosion-proof construction

Detection principle
Detection range

0 - 5 vol%, 0 - 10 vol%, 0 - 25 vol%Alarm setpoints

Depends on detection range.

Alarm typeGas alarm, fault alarm

Alarm pattern

Alarm message (AL1/AL2) display

Explosion-proof
construction
Explosion-proof class

For toxic gas detection

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment• Corrosive gas resistant enclosure: SUS enclosure available at customer request.

Power source

Refer to Page 34.

Shipping and shipbuilding

Aerospace• Compact lightweight design allows easy installation anywhere. GD-F3A-A/GD-F3A-SC-A

Certification

GD-F88Di

Steel plants

Volcanic and hot spring sites

Intrinsically safe explosion-proof construction
Japan Ex: Ex ia II C T4 Ga (when using safety barrier)Certification

Japan ExPower source

24 V DC ± 10 %External dimensions
WeightMiscellaneous

Miscellaneous

For toxic gas detection

Construction sites

Laboratories and universities

Analyzers

Analyzers
Refer to Page 34.

Oil refining and petrochemicals• Equipped with pressure correction sensor: Virtually unaffected by pressure fluctuations• Built-in aspirator (optional) GD-F88Di

GD-GD-F88Ai

Electronics
Firefighting and rescue• Two-wire gas detector: Allows direct transmission to control system.

Explosion-proof class

35

Main areas of use

Oxygen Gas Detector Head

Alarm units

Alarm units

GD-F88Ai
GD-F88Di

Main areas of use

Detectors

Detectors

Oxygen Gas Detector Head

Explosion-proof class

Japan Ex: Ex ia II C T4 X (when using Zener barrier)Certifications

Japan Ex, CE marking (GD-F4A-A)

Power source

24 V DC (Supplied from indicator/alarm unit)

Detector signal
External dimensions
WeightDirect sensor output signal

Current signal (4 - 20 mA DC)

Approx. 140 mm (W) × 175 mm (H) × 86 mm (D)Approx. 140 mm (W) × 175 mm (H) × 95 mm (D)Approx. 1.5 kg

Approx. 1.7 kg

Operating temperaturerange-10 - +40 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)

Approx. 220 mm (W) × 265 mm (H) × 90 mm (D)Approx. 2.5 kg

Operating temperaturerange-10 - +40 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation)36

Incorporates reliable optical interferometric sensors backed by 80-year track record.

Main areas of use
Explosion-proof Calorimeter				Main areas of use
Optical Interferometric Gas Monitor				

OHC-800

Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

FI-900Measurement target gases

Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detectors

Detectors

High-precision calorimeter based on proprietary calculation method

Measurement target gases

Calorific value

Depends on sensor installed

Explosion-proof

Explosion-proof

Explosion-proof

Non-explosion-proof

Alarm units

Alarm units

Explosion-proof

Non-explosion-proof

Features• Incorporates Riken Keiki’s unique Riken optsonic calculation method (Japanese Patent

No. 5184983). Resistant to influence from incombustible gases for high-precision measurements• Fast response at 90 % response within 5 seconds

Specifications• Hydrogen explosion-proof construction (Ex db IIB+H2 T4 Gb) required for calorimeters allows

Model

installation in dangerous areas.
• Excellent temperature characteristics, with temperature change of 0.10 MJ/m3 or less per day• Calorific value/specific gravity/Wobbe index switchable with key operation, eliminating troublesome
calculations

Specifications• Large character LCD for easy viewing• Display switchable between calorific value (MJ/m3), specificgravity, and Wobbe index

Allows selection of display units using just the display keys to eliminate
the need to calculate values.
• Allows continuous measurement of calorific value (MJ/m3),

specific gravity, and Wobbe index.

Allows continuous measurement of calorific value (MJ/m3), specificgravity, and Wobbe index for on-site calorific value monitoring.

Model

OHC-800

Sampling method

Suction typeMeasurement target
gassesGases consisting of paraffin-based hydrocarbon gases primarily containing methane, typified by natural gas*1

Measurement range

Calorific measurement range: 25.00 - 50.00 MJ/m3 (Gross, converted to 0 °C, 101.325 kPa)
Density measurement range: 0.500 - 1.500 (converted to specific gravity)

Explosion-proof
construction

Flame-proof enclosure
IECEx: Ex db II B+H2 T4 Gb
ATEX: II 2G Ex db II B+H2 T4 Gb

Explosion-proof classProtection level

IP66/67 equivalent

track record• Sensors characterized by long-term stability and nosensitivity degradation eliminate the need for replacement
over the actual service life of 10 years.
• Measurements are based on the characteristic refractive
index of gases to allow measurement of virtually any gas
type.
• Capable of measuring even corrosive gases like NH3 and
VCM• Flameproof enclosure allows use even in H2
environments.
• Incorporates improved self-diagnostic functions and
MODBUS communication allowing monitoring of status aswell as gas concentrations.
• Ideal for VOC explosion prevention/concentration control
and hydrogen purity measurement

Measuring principle

Optical interferometricMeasurement range

Depends on gas specification.

Alarm setpoints

Depends on gas specification.

Explosion-proof
construction

Flame-proof enclosure

Protection level

IP66/67 equivalent

Certifications

IECEx, ATEX, Japan Ex, CE marking

Power source

100 - 240 V AC ± 10 %, 50/60 Hz, 24 V DC ± 10 % * IECEx/ATEX models are DC only.

External dimensions

Approx. 23 kg

Operating temperature
range

IECEx/ATEX: -20 - +60 °C (no sudden fluctuations)Japan Ex: -20 - +57 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation of water/gas inside product)

Operating pressure
range

Atmospheric pressure (with no surging)

IECEx, ATEX, China Ex, FM, Japan Ex, CE marking

Power source

Ideal for explosion prevention control inside drying ovens

External dimensions

Approx. 286 mm (W) × 453 mm (H) × 150 mm (D)Optical Interferometric Gas Monitor
			Approx. 23 kg-20 - +57 °C (no sudden fluctuations)• Explosion-proof in hydrogen environments

Operating humidityrange

0 - 95 %RH (no condensation)

Rugged flame-proof enclosure (explosion-proof class: Ex db IIB+H2 T4*1: This assumes that gases such as N2, O2, CO2, and CO included in the measurement target gases do not exceed 20 % of the total.
* For information on other measurement ranges, please contact Riken Keiki.

FI-915

Approx. 286 mm (W) × 453 mm (H) × 150 mm (D) (excluding projections)

Weight100 - 240 V AC ± 10 %, 50/60 Hz (max. 18 VA) or
24 V DC ± 10 % (max. 5 W)
Can be switched between AC/DC.

WeightIECEx: Ex db II B+H2 T4 Gb
ATEX: II 2G Ex db II B+H2 T4 Gb

Explosion-proof class

Certifications

Operating temperature
rangeGb) allows use even in hydrogen atmospheres.

• Uses reliable optical interferometric sensors with 80-year

Suction type

Miscellaneous

Miscellaneous

Uses Riken Keiki’s proprietary optsonic calculation method for reliablehigh-precision calorimetric measurements that eliminate the effects ofgases without calorific value (e.g. N2, O2, CO2) within fuel gases.

FI-900Sampling method

FeaturesAnalyzers

Analyzers
OHC-800 and RS-400 Series Sampling Units• High repetition accuracy within ±0.02 MJ/m3

Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue

Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Measurement target gases
Depends on sensor installed

Explosion-proof

Sampling system models

Explosion-proof

Can be used in combination with the dedicated RS-400 Series sampling unit for the OHC-800
to handle a wide range of installation parameters, including installation location and sampling pressure.
(Please select the model to suit the intended operating environment.)

Specifications

RS-400-Storage box
0: No storage box
1: Outdoor (SUS) box with shade plate
2: Indoor (SPCC) box with window

37

Model

Measurement target gas pressure
reduction valve

Measurement target bypass
flow rate

Select a model with a pressure reduction valve
if the sampling point is pressurized.

“0: No bypass” is automaticallyselected for models with no pressure
reduction valve.

0: No pressure reduction valve
1: With pressure reduction valve

Non-explosion-proof

0: No bypass
1: 0.5 - 5 L/min
2: 1 - 10 L/min
3: 2 - 20 L/min

Pressure gauge scale units
Select “1: MPa” for use within Japan inaccordance with the Measurement Act.

1: MPa2: MPa/PSI dual scale pressure gauge

FI-915

Features

Sampling method

Suction typeMeasuring principle

Optical interferometric• Rapid response, long-term consistency, and easy

Measurement range

operation without need for warm-up.
• No sensitivity deterioration due to silicon• Features temperature and atmospheric pressure
correction functions.
• Supports up to eight different gas ranges.
* Can be specified at time of purchase.

• Increased size LCD screen for improved visibility• Allows easy pump unit replacement.
• Fully compatible with previous FI-815A model

Alarm type0 - 100 %LEL
Gas alarm, fault alarm

Alarm pattern

Lamp lit

Power source

100 - 240 V AC ± 10 %, 50/60 Hz

External dimensions
WeightApprox. 370 mm (W) × 150 mm (H) × 269 mm (D) (excluding projections)
Approx. 6 kg

Operating temperaturerange-10 - +50 °C (no sudden fluctuations)Operating humidityrange

0 - 95 %RH (no condensation of water/gas inside product)38

Detection tape gas monitor ideal for cleanroom environmental monitoring

FP

Main areas of use
Electronics

SeriesOil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Detection target gases

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

FP

Firefighting and rescue Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Series

FP-300AGZS

Depends on detection target gas

Explosion-proof
Explosion-proof

Main areas of use

Non-explosion-proof

Electronics

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases
Depends on detection target gas

Explosion-proof
Explosion-proof

Alarm units

Alarm units

FP-300FP-301

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

C5F8, C4F6
Highly Sensitive Toxic Gas Monitor

Detectors

Detectors

Highly Sensitive Toxic Gas Monitor

Exceptionally high detection sensitivity; ideal for low-concentration monitoring

Non-explosion-proof

FeaturesFeatures• Excellent selectivity with minimal interference from other gases• Excellent selectivity with minimal interference from other gases• Rapid detection of minute environmental changes (Detectable at ppb level)• Cassette insertion method for easy tape replacement• Cassette insertion method for easy tape replacement (Using microcassette)• Arsine detection range of 0 - 15 ppb supports new ACGIH acceptable concentration (5 ppb) FP-301

Specifications

PH3

Sampling method

Suction type

Detection range

0 - 5.0 ppm

Detection target gas

Toxic gas

Alarm setpoints

WARNING: 2.0 ppm, ALARM: 4.0 ppm

AsH3

Detection tape method

Alarm type

Detection range

Refer to detection target gas list.

Alarm pattern

Alarm setpoints

Depends on detection target gas.

Detection tape usage
time

Alarm typeGas alarm, fault alarm

Alarm pattern

Lamp lit, buzzer
1 month (with no alarms), with remaining tape amount indication, tape end indication/warning
CE marking (AC model only)

Power source

Tabletop type: 100 - 240 V AC ± 10 %, 50/60 Hz
Panel-mounted type: 24 V DC ± 10 %WeightTabletop type: Approx 6.5 kg
Panel-mounted type: Approx. 5.5 kg

0 - 500 ppb*

Operating temperaturerange+5 - 35 °C (no sudden fluctuations)0 - 1,000 ppb

B2H6
GeH4

0 - 8 ppm*
0 - 15 ppm
0 - 300 ppb
0 - 2 ppm
0 - 6 ppm

Model

FP-301

Sampling method
Detection target gas

Suction type
AsH3 (Arsine)

Detection principle
Detection range

AsH3: 0 - 15 ppb

H2Se: 0 - 200 ppb

Alarm setpoints

AsH3: 5 ppb (WARING)/10 ppb (ALARM)

H2Se: 50 ppb (WARING)/100 ppb (ALARM)

Si2H6

0 - 10 ppm

Alarm typeGas alarm, fault alarmTBA

0 - 150 ppb

Alarm pattern

Lamp lit, buzzer

0.25 - 1 ppm

Detection tape usagetime

1.5 - 8 ppm

HF

0 - 9 ppm

NH3

0.5 - 4 ppm* For detoxification systems

1 month (with no alarms), with remaining tape amount indication, tape end indication/warning

Certfication

CE marking (AC model only)

Power source

Tabletop type: 100 - 240 V AC ± 10 %, 50/60 Hz
Panel-mounted type: 24 V DC ± 10 %External dimensions
WeightOperating temperature
range
Operating humidity
range

SeriesElectronics

Oil refining and petrochemicals

Firefighting and rescue Laboratories and universities
Miscellaneous

Construction sites

Steel plants

Shipping and shipbuilding

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases
AsH3

Detection tape method

0 - 1.5 ppm

HCI

30 - 90 %RH (no condensation)

H2Se (Hydrogen selenide)

0 - 0.8 ppm*

Cl2

+5 - 35 °C (no sudden fluctuations)Operating humidity
range

Main areas of use

FP-270As

Specifications

Approx. 9.5 kg

Operating temperature
range

Excellent selectivity free of interference from other gases

FP

30 - 80 %RH (no condensation)* May vary depending on tape used.

0 - 10 ppm
SiH4

100 - 240 V AC, 50/60 Hz (power consumption 150 VA or less)Approx. 250 mm (W) × 198 mm (H) × 300 mm (D) (excluding projections)

WeightTabletop type: Approx. 164 mm (W) × 198 mm (H) × 263 mm (D)Panel-mounted type: Approx. 164 mm (W) × 164 mm (H) × 263 mm (D) (excluding projections)0 - 100 ppb
H2S

Lamp lit, buzzer
2 months (with no alarms), with remaining tape amount indication, tape end indication/warning

External dimensions

Certification

Operating humidity
range

Gas alarm, fault alarm

Power source

Detection range

0 - 150 ppb

Detection tape method

Detection principle

External dimensions

0 - 900 ppb

C4F6 (Perfluorobutadiene)

Detection principle

Explosion-proof
Explosion-proof

Non-explosion-proof

Specifications
Model

FP-270As

Detection target gas

AsH3 (Arsine)

Detection principle

Detection tape method

Tabletop type: Approx. 164 mm (W) × 198 mm (H) × 263 mm (D)Panel-mounted type: Approx. 164 mm (W) × 164 mm (H) × 263 mm (D) (excluding projections)

Detection range

0 - 15 ppm

Tabletop type: Approx 6.5 kg
Panel-mounted type: Approx. 5.5 kg

Alarm setpoints

WARNING: 5 ppb, ALARM: 10 ppb

Alarm pattern

Lamp lit, buzzer+5 - 35 °C (no sudden fluctuations)30 - 80 %RH (no condensation)* May vary depending on tape used.

Miscellaneous

Miscellaneous
Detection target gas

Suction type
C5F8 (Octafluorocyclopentene)

Detection target gas
FP-300Detection tape usage
time

Detection target gas list

FP-300AGZS

Sampling method

Analyzers

Analyzers

Model

Model

39

Specifications

Detection tape usage
time

1 month (with no alarms), with remaining tape amount indication, tape end indication/warning

External output

4 - 20 mA DC (load resistance 300 Ω or less), 0 - 1 V DC

Power source

100 V AC ± 10 %, 50/60 Hz (power consumption: max. 40 VA)

External dimensions/weightApprox. 300 mm (W) × 200 mm (H) × 370 mm (D) / Approx. 13.4 kg

Operating temperaturerange+5 - 35 °C (no sudden fluctuations)Operating humidity
range

30 - 90 %RH (no condensation)

40

Measures infrared long-wavelength region to detect fluorine compounds and solvents.

RI

Series

RI-257Main areas of use

Infrared Type CO2 Monitor
Oil refining and petrochemicals

Electronics

Firefighting and rescue Laboratories and universities

Construction sites

Steel plants

Shipping and shipbuilding

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Detection target gases
Fluorocarbon gas

RI

Series

RI-215D

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Electronics

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases

The detection target gases will vary depending on the particular sensor types installed.

PFC gasMain areas of use
Detectors

Detectors

Infrared Type Fluorocarbon/
IPA Gas Monitor

Ideal for automatic ventilation, energy-saving air-conditioning control, and air quality management

Carbon dioxide

Solvent gases

Explosion-proof

Explosion-proof

Explosion-proof

Non-explosion-proof

Alarm units

Alarm units

Explosion-proof

Non-explosion-proof

Features• Space-saving design allows easy mounting.
• External output (4 - 20 mA) with control contact output• For automatic ventilation and energy-saving air-conditioning control• Internal pump allows suction measurement from sampling points.

Analyzers

Analyzers

Specifications
Model

RI-257

Specifications

Suction type

Detection principle

Non-dispersive infrared type

Model

RI-215D

Detection range

Depends on detection target gas.

Sampling method

Suction type

Alarm pattern

Lamp lit

Detection target gas

CO2

FeaturesPower source

100 V AC ± 10 % or 24 V DC ± 10 %Detection principle

Non-dispersive infrared type• Space-saving design allows easy mounting.

WeightDetection range

ppm model: 0 - 2,000 ppm, 0 - 5,000 ppm, 0 - 9,990 ppm
Vol% model: 0 - 2 vol%, 0 - 5 vol%• Digital display

Operating temperaturerange

0 - +45 °C (no sudden fluctuations)Power source

100 V ± 10 % AC, 50/60 Hz, 110 V ± 10 % AC 50/60 Hz,
220 V ± 10 % AC, 50/60 Hz

Operating humidity
range

30 - 90 %RH (no condensation)

External dimensions• Minimal effects from interference gases• Outstanding long-term consistency with virtually no

sensitivity degradation• Infrared type eliminates virtually all consumable parts.

Approx. 180 mm (W) × 355 mm (H) × 97 mm (D) (excluding projections)
Approx. 3.8 kg

External dimensions

For easy measurement of gases such as CO, CO2, and hydrocarbon
Transportable Infrared Gas Detector

RI

Series

RI-557

Infrared Type CO2 Monitor
Oil refining and petrochemicals

Firefighting and rescue Laboratories and universities
Miscellaneous

Carbon monoxide

Construction sites

Steel plants

Shipping and shipbuilding

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases

CO2RK-Lite

0 - +40 °C (no sudden fluctuations)Operating humidity
range

10 - 90 %RH (no condensation)

Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases

The detection target gases will vary depending on the particular sensor types installed.

Carbon dioxide

Approx. 3.6 kg

Operating temperature
range

CO2 gas monitor for visualizing ventilation levels

Main areas of use
Electronics

Approx. 220 mm (W) × 265 mm (H) × 76 mm (D) (excluding projections)

WeightMiscellaneous

Miscellaneous

Sampling method

Carbon dioxide

Hydrocarbons

Explosion-proof

Explosion-proof

Explosion-proof

Explosion-proof

Non-explosion-proof

Non-explosion-proof

Specifications
Specifications
Portable model

RI-557

Sampling method

Suction type

Detection target gas

CO2, CH4, CO, i-C4H10, C3H8, etc.

Features

Model

CO2RK-Lite

Sampling method

Diffusion type

Detection target gas

CO2

Detection principle

Non-dispersive infrared type

Detection principle

Non-dispersive infrared type• Features optical sensor (NDIR) to directly detect CO2.

Detection range

400 - 5,000 ppm

FeaturesDetection range

Depends on detection target gas.

• Does not respond to sterilizing alcohol.

Alarm setpoints

1st: 1,000 ppm / 2nd: 1,500 ppm (default setting)

Alarm typeGas alarm, fault alarm• Linking with smartphones via Bluetooth®

Alarm typeGas alarm• Compact and lightweight for portability

Alarm pattern

Lamp lit, detail display

Alarm pattern

Backlight lit, buzzer sounding• With external output

Power source• Automatic suction using built-in pump

External dimensions• Automatically switching double range display

Weight• Features low flow rate alarm.
• Lineup of different measurement ranges• Infrared type eliminates virtually all consumable parts.

41

Model

100 - 200 V AC ± 10 %, 50/60 Hz
Approx. 220 mm (W) × 200 mm (H) × 320 mm (D) (excluding projections)
Approx. 5.7 kg

Operating temperaturerange

0 - +40 °C (no sudden fluctuations)Operating humidityrange

0 - 90 %RH (no condensation)• Bluetooth capability

The GX-3R Pro can communicate with smartphones and tablets via
Bluetooth.
Allows alarms to be issued to remote locations in real time to notify
emergency situations using a dedicated app.
Bluetooth® and the logo are
registered trademarks of Bluetooth SIG, Inc.

Certification

CE Marking

Power source

100 - 240 V AC ± 10 %, 50/60 Hz

External dimensions
WeightApprox. 80 mm (W) × 120 mm (H) × 38.5 mm (D)Approx. 180 g

Operating temperaturerange

0 - +40 °C (no sudden fluctuations)Operating humidityrange

0 - 90 %RH (no condensation)

42

Can be combined with various different detectors to suit specific requirements.

600

Multi-Point Indicator/Alarm Unit

Main areas of use
Electronics

SeriesIndoor Oxygen Monitor

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

OX-600Detection target gases
OxygenIndoor Carbon Monoxide Monitor

RM-5000

Main areas of use
Electronics

SeriesConstruction sites

Steel plants

Shipping and shipbuilding

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Detection target gases

The detection target gases will vary depending on the particular model (specific sensor types installed).

Carbon monoxide

Oil refining and petrochemicals

Firefighting and rescue Laboratories and universities

Carbon dioxide

Depends on detector connected

Explosion-proof

Explosion-proof

Explosion-proof

Indoor CO2 Monitor

Features

RM-5000 features• Built-in pressure correction sensor eliminates reading fluctuations due to pressure changes. OX-600• Supports a wide range of gas detector heads.

Non-explosion-proof• High visibility LCD screen illuminates in green, orange, or red, depending on the operational state.

Non-explosion-proof• Gas concentrations are displayed in two ways: bar meter and digital display.

Multi-case• Allows selection of one of three power supply types to suit the usage environment: AC power, DC

Alarm units

Alarm units

EC-600Explosion-proof

RI-600• High-contrast 3-color LCD improves visibility of detection status.
• Equipped with RS-485 communication function (optional)

Specifications
Model

RM-5000

Alarm typeGas alarm, fault alarm

Alarm pattern

Alarm lamp, buzzer

Certification

CE Marking (Contact Riken Keiki for corresponding models.)

Power source

24 V DC ± 10%

External dimensions

Approx. 29.6 mm (W) × 120 mm (H) × 92 mm (D) (unit only)

WeightSingle case

Single case(Buzzer unit)(Indicator/alarm unit)

Approx. 0.1 kg (unit only)

Operating temperaturerange-10 - +40 °C (no sudden fluctuations)Operating humidity
range

10 - 90 %RH (no condensation)

Miscellaneous

Miscellaneous

Normal (Green)• Indicator/alarm unit - detector connection examples

Caution alarm (Orange)

GP-5001

Model

OX-600EC-600Sampling method

RI-600Diffusion typeO2

CO

Detection principle

Galvanic cell type

Electrochemical typeNon-dispersive infrared type

Detection range

0 - 25.0 vol% or 0 - 50.0 vol%0 - 150 ppm

0 - 2,000 ppm/0 - 5,000 ppm/0 - 10,000 ppm/
0 - 2 vol%/0 - 5 vol%Alarm setpoints

0 - 25.0 vol% 1st: 19.0 vol% 2nd: 18.0 vol%0 - 50.0 vol% 1st: 18.0 vol% 2nd: 25.0 vol%1st: 50 ppm 2nd: 100 ppm (default setting)ppm 1st/2nd: 1,000 ppm
0 - 2 vol% 1st/2nd: 1.0 vol%0 - 5 vol% 1st/2nd: 2.5 vol%Detection target gas

CVVS, 3-coreSingle case

Single caseGas alarm, fault alarm

Alarm pattern

Lamp lit, buzzer, detail display

Power source
Continuous operatingtime
External dimensions
WeightOperatingtemperature range

CE marking (DC model only), JIS

Multi-casedetectors.

• Easy-to-read digital gas concentration display• Allows low flow rate signal input.

Approx. 1 year (25 °C, no alarms, backlight switched off) * Using dry batteries—• Can be connected to network (optional).

Multi-caseSpecifications

Main unit: Approx. 80 mm (W) × 120 mm (H) × 35.5 mm (D), Remote sensor: Approx. 40 mm (W) × 96 mm (H) × 35.5 mm (D)Main unit: AC spec. approx. 200 g, DC spec. approx. 180 g, dry battery spec. approx. 230 g
Remote sensor unit: Approx. 55 g (excluding cables), AC adapter: Approx. 82 g (including cables)

Model

Main unit: AC spec. approx. 200 g, DC spec. approx. 180 g
Remote sensor: Approx. 55 g (excluding cables)

0 - +40 °C (no sudden fluctuations)
0 - 90 %RH (no condensation)

Orange lamp (ALM1) flashing (steadily lit after confirmation)
Red lamp (ALM2) flashing (steadily lit after confirmation)

Certification

CE Marking (Contact Riken Keiki for corresponding models.)

External dimensions
Weight—Single case

Single case(Indicator/alarm unit)(Buzzer unit)

RM-590Alarm pattern

Power source

Atmospheric pressure (80 - 105 kPa)

The EC-/OX-/RM-5002 can be connected to 2-wire
4 - 20 mA transmission detectors, and the RM-5003
can be connected to 3-wire 4 - 20 mA transmission

The RM-5000 Series can be connected to thedetector corresponding to the target gas.

RM-590 features

CE marking (DC model only)
100 V AC ± 10 % or 24 V DC ± 10 %-10 - +40 °C (no sudden fluctuations)or

Multi-case• Selectable alarm patterns

100 V AC ± 10 % or 24 V DC ± 10 % or
Dry batteries (AA alkaline batteries × 2)

Operating humidity
range
Operating pressure
range

Seriesor

CO2

Alarm type
Certifications

RM-590SD-1 Series

CVVS, 4-core

Danger alarm (Red)Specifications

RM-5003

GD-D58 · AC/DC

Multi-Point Indicator/Alarm Unit			43

Analyzers

Analyzers

power, or dry battery specifications. OX-600/EC-600• Allows remote measurement at distance up to 20 m with optional remote sensor.
• Complies with JIS T 8201:2010 (Oxygen deficiency indicator) requirements. OX-600

Remote sensor[Optional]

Detectors

Detectors

Compact, lightweight design with 3-color LCD screen for superior visibility

24 V DC ± 10 %Approx. 36 mm (W) × 72 mm (H) × 134 mm (D)Approx. 0.1 kg (unit only)

Operating temperaturerange

0 - +40 °C (no sudden fluctuations)Operating humidity
range

10 - 90 %RH (no condensation)

44

Allows up to 12 gas detectors to be mounted.

GP-147Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Main areas of use

Single-Point Indicator/Alarm Unit

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detection target gases

RM-6000

Electronics

SeriesOil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Detection target gases

The detection target gases will vary depending on the particular model (specific sensor types installed).

Explosion-proof

Explosion-proof

Explosion-proof

Non-explosion-proof

Features• Allows selection of power supply backup for each gas detector.

• Compact, lightweight• For gas leak monitoring in hydrogen stations• Gas concentrations are displayed in two ways: bar meter and digital display.

• Capable of early detection of hydrogen leaks (ppm) and also explosion prevention (%LEL)• Uses independent units for easy mounting.

GP-147
Gas alarm, fault alarm

Alarm pattern

Lamp lit + buzzer (standard) or audible message (optional)

GeneralVoltage output 0 - 6 - 12 V DC (10 mA or less)No-voltage 1c contact (contact capacity: 250 V AC, 2 A)
External buzzer power supply output: 24 V DC (10 mA or less)
External buzzer contact output: No voltage 1a contact (standard) or
1b contact (optional) (contact capacity: 250 V AC, 1 A)

Individual

Voltage output 0 - 6 - 12 V DC (10 mA or less) (standard) or
4 - 20 mA DC (load resistance 300 Ω or less) (optional)
Gas alarm contact*1: No voltage 2 contacts (contact capacity: 250 V AC, 2 A),
a contact (standard) or b contact (optional)

Power source

100 - 120 V AC or 200 - 240 V AC, 50/60 Hz

External dimensions/weight(Including UPS)

2-point type: Approx. 305 mm (W) × 290 mm (H) × 73 mm (D) / Approx. 3.9 kg
4-point type: Approx. 395 mm (W) × 290 mm (H) × 73 mm (D) / Approx. 5.0 kg
6-point type: Approx. 485 mm (W) × 290 mm (H) × 73 mm (D) / Approx. 5.8 kg
8-point type: Approx. 575 mm (W) × 290 mm (H) × 73 mm (D) / Approx. 6.6 kg
10-point type: Approx. 665 mm (W) × 290 mm (H) × 73 mm (D) / Approx. 7.4 kg
12-point type: Approx. 755 mm (W) × 290 mm (H) × 73 mm (D) / Approx. 8.2 kg

Operating temperaturerange-10 - +50 °C (no sudden fluctuations)Operating humidity
range

10 - 90 %RH (no condensation)

1st alarm

Methane 75 %LEL
2nd alarm for 50 %LEL or higher

Methane 45 %LEL
1st alarm for 25 %LEL or
higherMethane 0 %LEL

NormalEC-6002(For toxic gases)

2nd alarm

CAUTIONDANGER

OX-6001/OX-6002(For oxygen)
RM-6002/6003(For 4 - 20 mA transmission)
RM-6003T(For 4 - 30 mA transmission)Specifications

Detection target gas list
ToluenePropaneHydrogen

Isobutane

LPG

City gas

Methane

LNG

CNG

C7H8
100
%LEL
1

C3H8
100
%LEL
1

H2
100
%LEL
1

I-C4H10

LPG

13 A

CH4

LNG

CNG

MethaneCity gas

LNG

CNG

Hydrogen

Acetylene

Gasoline

CH4

13 A

LNG

CNG

H2
2,000
ppm
10

C2H2
100
%LEL
1

GASOLIN
100
%LEL
1

100
%LEL
1

100
%LEL
1

Model
Corresponding detector
detection principle
Target gas

12,500ppm
100Detector signal

GP-6001
NC-6001 (W)Catalytic
combustion typeNew ceramic type(catalytic type)SP-6001
Hot-wiresemiconductor
type

Combustible gas

GH-6001

EC-6002

Semiconductor
typeElectrochemical
type
Pyrolysis-particle
type

Galvanic cell type

Toxic gas

OxygenCombustible gas,
toxic gas

Current signal(4 - 20 mA DC)

Direct sensor output signal

OX-6001

OX-6002

RM-6002

RM-6003

General measurement signal

RM-6003T
Semiconductor typedetector(GD-A44V)

Combustible gas, toxic gas, oxygen, etc. Carbon monoxide(General measurement signal)

Sensor output
Direct signal

Current signal(4 - 20 mA DC)

Current signal(4 - 30 mA DC)

Alarm indications

1st: ALM1 red lamp flashing or lit (after resetting), buzzer
2nd: ALM2 red lamp flashing or lit (after resetting), buzzer

Alarm contact

Each no voltage contact 1a or 1b (2-stage independent) always de-energized (energized in alarm state) or always energized (de-energized in alarm state)

Certification

CE marking (Contact Riken Keiki for corresponding models.)

Power source

AC spec.: 100 - 240 V AC ± 10 %, 50/60 Hz; DC spec.: 24 V DC ± 10 % (21.6 - 26.4 V DC) (optional)

Power consumption(excluding pump)45

Normal

GH-6001(For combustible gases/toxic gases)*1: One of the two gas alarm contacts can be changed to a fault alarm contact.
*2: When UPS is used.

For information on other gases, please contact Riken Keiki.

Gas concentrations are displayed simultaneously as bar meter and digital display. Names of gases are
displayed in one of three colors to indicate the detection status. Allows to grasp detection status evenfrom a distance.

SP-6001(For combustible gases/toxic gases)

12 V 2.3 Ah lead-acid batteries × 2, with backup point selection function

UPS*2

Easy-to-read 3-color LCD display

Miscellaneous

Miscellaneous

Alarm type

External
output• Features maintenance mode function to disable external alarms during maintenance.

GP-6001(W)(For combustible gases)

Specifications
Model

GP-6001(For combustible gases)• Two-stage alarm function allows sequential gas alarm management.

Analyzers

Analyzers• Easy addition of (2-point type) indicator units, with capacity to implement up to 12 points.

Detection target
gas name
Displayed text
F.S.
Units
1 digitNon-explosion-proof

Features• Provides audible alerts for gas leaks and faults (optional).

Detection target
gas name
Displayed text
F.S.
Units
1 digit

Alarm units

Alarm units

Explosion-proof• Red/green 2-color LCD and bar meter display for superior visibility of detection status

Indicator unit
(Two points per unit)

The detection target gases will vary depending on the particular model (specific sensor types installed).

Depends on detector connected

Depends on detector connected

Easy addition of indicator units

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Detectors

Detectors

Combustible Gas Detection Alarm System

Uses independent units for easy mounting.

Max. 15 VA
Max. 8.5 W(including detectors)

Max. 11.5 VA
Max. 6 W(including
detectors)

Max. 7.5 VA
Max. 3.5 W(including
detectors)

Max. 6.5 VA
Max. 3 W(including
detectors)

Max. 7.5 VA
Max. 3.5 W(including
detectors)

Max. 7.5 VA
Max. 3.5 W(including detectors)

External output

4 - 20 mA DC (non-insulated, load resistance 300 Ω or less) / Digital transmission: RS-485 (optional)

External dimensions

Approx. 110 mm (W) × 190 mm (H) × 54 mm (D) (excluding projections)

WeightWall-mounted type: 580 g, embedded type: 650 g

Max. 10.5 VA
Max. 7.5 W(including
detectors)

46

Lineup features two types of more advanced multifunction pro specifications!
Main areas of use

Riken Keiki
Kanshiro II

Electronics

Steel plants

Shipping and shipbuilding

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Customer’s PC

AC-2S

Electronics

SeriesWork function• Smaller and lower in price than previous models AC-2S• Features high-intensity irradiation optical system exceeding 2 μW. AC-2S Pro α• Features low-energy irradiation optical system capable of measuring from down to 2 eV. AC-2S Pro α• 400 μm square micro spot AC-2S Pro β• Capable of high-temperature measurement at up to 100 °C AC-2S Pro α/AC-2S Pro β• Film thickness measurement AC-2S Pro α/AC-2S Pro β• Expanded search functions! Real-time full text free word searching from each display screen• Precision measurement in 0.01 eV steps AC-2S Pro α/AC-2S Pro β• Includes often-requested multi-point measurement and repeated measurement functions.
• Allows analysis after importing AC-2/3/5 data.
• Uses flat-plate open counter capable of photoelectron counts of up to 4,000 cps.

the screen.
• Pump flow rate, battery level, sensor information, etc.

• Map screen

Specifications
Model

AC-2S Pro α

AC-2S

Measuring principle
Measurement energy scanningrange

3.4 eV - 6.2 eV (364 nm - 200 nm)

4,000 cps

UV lamp

Deuterium (D2) lamp

UV spot size

4 mm × 4 mm square or smaller

Laser-driven light source (LDLS)

Spectrometer

The screen can be enlarged forease of viewing even with small
display sizes.

• Information panel

115 mm × 122 mm

120 mm × 122 mm heated sample stage

Operating temperature range+15 - 35 °C (no sudden fluctuations)Operating humidity range

0 - 60 %RH (no condensation)

Power source

100 - 240 V AC, 50/60 Hz, 5 A (max.)

Dry compressed air supply
conditions

Bar Graph

On-premise terminal(server)
Client terminal(monitor)
Systemrequirements Client communication
methodInformation collection andalarm control

Trend

Display configuration
Alarm Functions
Functions/
Number of tags
performance
Alarm history
Trend
Accounts
Management functions

120 mm × 122 mm heated sample stage

Main unit:
100 - 240 V AC, 50/60 Hz, 5 A (max.)
LDLS (AC adapter):
100 - 240 V AC, 50/60 Hz, 2.5 A
LDLS (main unit):
12 V DC 120 W
Temperature controller: 100 V AC (± 10 %), 50/60 Hz, 1 A (max.)
0.1 MPa - 0.2 MPa, 0.5 L/min (measurement), 2.0 L/min (purging)** Separate conditions apply to the air supply. We recommend an optional compressor (sold separately). (Contact Riken Keiki for more information.)

External dimensions

LC (light source unit):
Approx. 480 mm (W) × 317 mm (H) × 450 mm (D)DC (measuring unit):
Approx. 465 mm (W) × 360 mm (H) × 450 mm (D)WeightAC-2S LC (light source unit): Approx. 25 kg
AC-2S DC (measuring unit): Approx. 31 kg

Specifications
Alarm History

0.4 mm × 0.4 mm square or smaller

50 mm × 50 mm (max.), thickness 10 mm (max.)

Sample stage size

When an alarm occurs, thealarm area is indicated asshown on the left.

4 mm × 4 mm square or smaller
Grating-type monochromator

Sample size

List

3.4 eV - 6.2 eV (364 nm - 200 nm)

Standard time required for work function measurement: Approx. 5 minutes** For measurement energy scanning range: 4.2 - 6.2 eV, step: 0.1 eV, count time: 5 s per step

Maximum count rate
(CPS: Electron count per second)

Menu panel

2.0 eV - 6.2 eV (620 nm - 200 nm)
Work function 0.02 eV (sample: Gold sheet)

Measurement time

Information panel

AC-2S Pro β

Photoemission yield spectroscopy in air (PYSA) (Detector: Low-energy electron count method)

Miscellaneous

Miscellaneous

The plan view screen canbe enlarged and reducedby screen operations.

Repeatability (standard deviation)

47

Analyzers

Analyzers• Features new irradiation optical system (LDLS lamp) AC-2S Pro β• Other gas detector information in addition to gas concentration and alarm status can be checked on

Screen check

Ionization potential

Device: More versatile

Information: More detailed• Alarm display screen

Food industry

Features• Completely new design and interface! Improved visual appeal and user friendlinessGas
detectors

Shipping and shipbuilding

Aerospace

FeaturesInterface: Closer to requirements

PLC

Steel plants

Measuring objects* The detection target gases will vary depending on the particular model (specific sensor types installed).

Depends on sensor unit installed• Customers can also use office PCs and mobile devices.

Monitoring PC

Construction sites
Volcanic and hot spring sites

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous• Customers can add their own monitoring PC.

Kanshiro II
server PC

Oil refining and petrochemicals

Firefighting and rescue Laboratories and universities

Alarm units

Alarm units

Customer’s
cellphone

Construction sites
Volcanic and hot spring sites

Detection target gases
Installed withbrowser allowing
use and addition as
required

Customer’sLAN

Oil refining and petrochemicals

Firefighting and rescue Laboratories and universities
Miscellaneous

Main areas of use

Photoemission Yield Spectroscopy in Air

Detectors

Detectors

Gas Detection Alarm System

LC (light source unit)*: Approx. 623 mm (W) × 317 mm (H) × 450 mm (D)DC (measuring unit):
Approx. 465 mm (W) × 360 mm (H) × 450 mm (D)Temperature controller: Approx. 200 mm (W) × 163 mm (H) × 150 mm (D)* The LDLS power supply is housed in the LC (light source unit).

AC-2S LC (light source unit): Approx. 30 kg
AC-2S DC (measuring unit): Approx. 31 kg
Temperature controller:
Approx. 5 kg

CentOS7
Browser (Chrome, Edge)
Ethernet (LAN)PLC (Omron, Mitsubishi)• Function availability table

Function

Map (overall/individual), representative display panel,menu (operation panel),
information panel (List, Bar Graph, Alarm History, Trend)

Multi-point measurement

Alarm display, sound playback, push notification

High-temperature measurement

Max. 60,000 * Up to approx. 1,000 tags per PCLStores up to 100 million events.
Stores up to 3 years of data (1-second sampling).
Allows registration of up to 1,000 accounts.
Enables/disables alarm check, alarm reset, alarm off, skip operation, and map
display (restrictions) individually for each account.

Repeated measurement
Film thickness measurement
Long-life light source
Low-energy measurement
High UV intensity measurement
Micro spot measurement
Consumable part replacement notification

AC-2S

AC-2S Pro α

AC-2S Pro β

●

●

●

●

－

－

－

－

－

－

●

●

●

●

●

●

●

－

●

●

●

●

●

－

－

●

●

48

Capable of measuring large/multiple samples

AC-5

Main areas of use
Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Electronics

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Photoelectron Spectrometer Optional
Fermi Level Measuring Unit

FAC-2

Measuring objects
Work function

Main areas of use
Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Electronics

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Measuring objects

Ionization potential

Fermi level

Model

AC-5

Measuring principle

Photoemission yield spectroscopy in air (PYSA) (Detector: Low energy electron count method)

Photoelectron detector

Flat-plate open counterUV energy range

3.4 - 6.2 eV
1.0 nW or less (at 5.9 eV)Maximum light intensity

500.0 nW or greater (D2 lamp)/2500.0 nW or greater (optional Xe lamp) (at 5.9 eV)

D2 lamp/Xe lamp (optional)

UV spot size

4 mm × 4 mm or less(varies depending on energy due to chromatic aberration of condensing lens)Maximum photoelectron
count rate
Maximum sample size

• Capable of continuous measurement (up to 25 at a time)

External dimensions

180 mm)• Capable of measuring twice as many electrons per• Allows measurement even of Fermi level in air

Grating-type monochromator
Area 180 mm × 180 mm or less, thickness 1 mm ± 0.2 mm or lessPower source

100 - 240 V AC, 50/60 Hz, 5 A (max.) * Excluding control PC
Light source LC-1: Approx. 470 mm (W) × 300 mm (H) × 500 mm (D)Measuring unit DC-1: Approx. 600 mm (W) × 380 mm (H) × 500 mm (D)WeightLight source LC-1: Approx. 35 kg, measurement unit DC-1: Approx. 50 kg * Excluding control PC

Operating temperaturerange+15 - 35 °C (no sudden fluctuations)Operating humidity range

20 - 60 %RH (no condensation)

for semiconductor samples not measurable withphotoelectron spectrometers.
• Extremely fast measurement allows even time-dependentmeasurements such as of variations in metal surfaces
immediately after coating formation.
• Easy sample mounting without fine adjustments ofelectrode/sample separation

Kelvin method

Measuring unit size

φ10mm

Measurement energy
range

3.4 eV - 6.2 eV (calibrated using standard sample with work function of 5.0 eV)

Measurement time

10 seconds or less (for metal samples)

Repeatability(standard deviation)Work function 0.02 eV (sample: metal plate)Power source

100 V AC, 50/60 Hz, 5 A (max.)External dimensions

Approx. 235 mm (W) × 330 mm (H) × 408 mm (D) mm

WeightApprox. 12 kg

Operating temperaturerange+10 - 35 °C

Operating temperature
range

20 - 60 %RH

Miscellaneous

Miscellaneous

second as previous models (Riken Keiki data)• Energy scanning range: 3.4 eV - 6.2 eV

Features4,000 cps

Spectrometer

FAC-2

Measuring principle

UV light source• Capable of measuring large samples (max. 180 mm ×

Model

Work function 0.02 eV (sample: metal plate)* A separate display and control system (PC) is required to operate this unit.

Capable of measuring up to 7.0 eV in air
Photoemission Yield Spectroscopy in Air

AC-3

Analyzers

Analyzers

approximately 5 minutes.

Specifications

Minimum light intensity
Repeatability(standard deviation)• Measures work function and ionization potential in air in

Alarm units

Alarm units

Specifications

FeaturesDetectors

Detectors

Photoemission Yield Spectroscopy in Air

Kelvin probe specifically for flat plate samples (AC Series option)

Portable non-destructive non-contact analyzer
Main areas of use
Electronics

Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Volcanic and hot spring sites

Aerospace

Food industry

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Miscellaneous

Portable X-ray Diffractometer with a
Fluorescent X-ray Analyzer

DF-01

Measuring objects
Work function

Main areas of use
Oil refining and petrochemicals

Construction sites

Steel plants

Shipping and shipbuilding

Firefighting and rescue Laboratories and universities

Electronics

Volcanic and hot spring sites

Aerospace

Food industry

Miscellaneous

Medical and nursing care / Paper industry / Printing and paints / AC and refrigeration equipment
Energy / FCV and hydrogen stations / Environment and risk assessment

Measuring objects

Ionization potential

Material surface analysis

Specifications

Specifications
Photoemission yield spectroscopy in air (PYSA) (Detector: Low-energy electron count method)

Photoelectron detector

Double cylinder open counterUV energy range
Maximum light intensity

100.0 nW or greater (at 5.9 eV)

Repeatability (standard
deviation)Work function 0.02 eV (sample: metal plate)

UV light source

D2 lamp

UV spot size

2 mm × 5 mm (No chromatic aberration due to use of concave mirror to focus light)

Spectrometer

samples (max. 30 mm square) or powder samples to bemeasured as is.
• Capable of measuring surface information down tonanometer order depths• Measures work function and ionization potential inapproximately 5 minutes.
• Maximum light intensity: 100 nW or greater (at 5.9 eV)• Handling is simple as vacuum is not used.

49

5.0 nW or less (at 5.9 eV)Maximum sample size
Power source
External dimensions

2,000 cps
Nitrogen substitution grating-type monochromator
Area 30 mm × 30 mm or less, thickness 10 mm or less100 - 240 V AC, 50/60 Hz, 5 A (max.) * Excluding control PC
Approx. 740 mm (W) × 1,080 mm (M) × 680 mm (D) (including casters)

WeightApprox. 120 kg * Excluding control PC

Operating temperature range+15 - 35 °C (no sudden fluctuations)Operating humidity range

20 - 60 %RH (no condensation)

13

Features

Air/HeMeasuring object size

φ2.5 mm or greater (varies depending on angle)

Measurement range

0 - 120°

Minimum step

0.002°
φ2 mm × 75 mm

Collimator• Both XRD and XRF analysis for the same point

Both X-ray diffraction (XRD) and X-ray fluorescence (XRF)
analysis can be performed on the same point, enablinghigh accuracy information to be obtained from datameasured by two different methods.
• Portable non-destructive non-contact analyzer
Allows on-site analysis using both X-ray diffraction (XRD)
and X-ray fluorescence (XRF) of antiquities and cultural
assets whose transport and carrying out are restricted.
• Measures large/irregular shape objects.
Capable of measuring objects of virtually any size or
shape

AI - 92U (* XRF)

No restrictions (* Must not impact unit.)

Atmosphere

4.0 - 7.0 eV

Minimum light intensity• Samples are measured in air, allowing relatively large

XRD, XRF

Sample configuration

AC-3

Measuring principle

Maximum photoelectron count
rate

DF-01

Measuring method
Elements detected

Model

FeaturesModel

X-ray tube target

Cr

X-ray tube rated output

28 W

X-ray tube rated voltage

35 kV

X-ray tube rated current

0.8 mA

X-ray tube coolingmethodForced air cooling

Detector

Si-PIN photodiode

Operation unit

PC

Power source

100 - 240 V AC, 50/60 Hz, 5 A (max.)External dimensions
WeightMeasuring unit: 542 mm (W) × 203 mm (H) × 342 mm (D) (20 = 120°)
Control unit: 427 mm (W) × 180 mm (H) × 295 mm (D)Measuring unit: Approx. 12 kg Control unit: Approx. 16 kg (excluding cables and PC)* A separate display and control system (PC) is required to operate this unit.

* A separate display and control system (PC) is required to operate this unit.

50

Marine Gas Detection Alarm Systems

The detector units of gas alarms are installed in locations associated with potential gas leaks or gas accumulations, which may include a wide
range of different environments.
When installed outdoors, rainwater, dust, or flooding inside pits may significantly impair gas alarm functions due to blockage or water ingressinside the detector.
Riken Keiki provides a range of pre-processing accessories suited to individual environments in which detectors are installed.

◆ Scanning Gas Detection Alarm System

Gas Detector with Signal Converter[Diffusion
type]

SD-3 Series[Suctiontype][Remotetype]

Detectors

Detectors

Accessories

For pump rooms, water ballast tanks, inter-barrier spaces, and other holds[Duct insertion type]
Calibration gas inlet

List screen

Bar meter screen

Alarm screen

FeaturesSunshade coverSplash guard

Alarm units

Alarm units

Area screen
Splash guard(sensor part)• Easy-to-read touch panel

Duct mounting kit• Consideration of space constraints for installation (Display unit remote from gas detector unit)

Combustible Gas Detector Head

• Allows the length of onboard piping to be reduced.

Analyzers

Analyzers

GD-A80 Series• Includes the system for preventing accidental sucking of ballast water (for oil tankers).

◆ Gas Sampling System

RS series

Mounting fixture<Provided as standard>

Round drip-proof cover(For silicone removal filter)

Round drip-proof cover(For vertical sensor mounting)Marine round drip-proof cover(For horizontal sensor mounting)• NK certified gas sampling system for safety monitoring of adjacent zones in cargo tanks of oil tankers

Square drip-proof coverof 20,000 DWT or over

• Series consisting of four types suited for each type of vessel• RS-40: 40 - 21 point selection

Flame-proof Suction Type Gas Detector

RS-30: 30 - 21 point selection
RS-20: 24 - 11 point selection
RS-10: Up to 10 point selection• Standardized design for reduced lead times and stable supply• Infrared type sensor enables measurement even in inert atmospheres.

GD-D58 Series

MC filter with flow monitor<Provided as standard>

Miscellaneous

Miscellaneous

Features

Gas inlet

Sunshade coverProtective cover

Combustible Gas Smart Transmitter/Gas Detector

SD-1 Series

Allows up to six points to be detected using a single gas detector.
◆ Sample Gas Selector

SM-6D
SM-6DS (corrosion-resistant model)

Specifications
Model
Number of sampling
pointsRound drip-proof cap

Splash guard

Sunshade cover(For mounting on wall or pipe)

Protective cover

Filters

Dust removal filter

51

Charcoal filter(For solvent/adsorption gas removal)

Trap filter

Silicone removal filter

SM-6D/SM-6DS (SUS model)
6 points (2, 3, 4, or 5 points can also be set.)

Sampling pump

Built-in, suction flow rate 3 L/min or more (with no load, 20 °C ambient temperature)Sampling timeStandard 120 seconds/point (preliminary suction 80 seconds + main suction 40 seconds)

Alarm type1st gas alarm: Yellow lamp indication (for each point)
2nd gas alarm: Red lamp indication (for each point)
Alarm buzzer: Sounds for 1st and 2nd gas alarms.

External contact output

1st gas alarm: 1a contact (for each point)
2nd gas alarm: 1a contact (for each point)
General alarm: 1a contact (for alarm or fault)
Contact capacity: 125 V AC, 0.5 A (resistance load)

Operating temperature/humidity range-10 - +40 °C, up to 90 %RH (no condensation)

Power source(Power consumption)

100 V AC ± 10 %, 50/60 Hz (approx. 95 VA)

External dimensions/weightApprox. 366 mm (W) × 354 mm (H) × 196 mm (D) / Approx. 16 kg

52

Gas Hazards
What are combustible gases?

What are toxic gases?

The Safety Regulations for General High Pressure Gas define combustible gases as follows:• Gases with a lower explosive limit (the explosive limit when mixed with air) of 10 % or lower• Gases for which the difference between the lower and upper explosive limits is 20 % or greater

The Safety Regulations for General High Pressure Gas define toxic gases as follows:• Gases such as acrylonitrile, acrolein, sulfur dioxide, arsine, ammonia, carbon monoxide, chlorine, chloromethyl,chloroprene, arsenic pentafluoride, phosphorus pentafluoride, ethylene oxide, nitrogen trifluoride, boron trifluoride,
phosphorus trifluoride, hydrogen cyanide, diethylamine, disilane, sulfur tetrafluoride, silicon tetrafluoride, diborane,hydrogen selenide, trimethylamine, carbon disulfide, fluorine, methyl bromide, benzene, phosgene, phosphine,monogermane, monosilane, monomethylamine, and hydrogen sulfide, which are toxic substances as stipulated in
Article 2, paragraph (1) of the Poisonous and Deleterious Substances Control Act (Act No. 303 of 1950)

Combustible gas is the general name given to gases that may cause combustion. Combustible gases may cause explosion if theoxygen (air) gas mixture is within a specific concentration range and in the presence of an ignition source. This concentration range
is referred to as the explosive range, the minimum concentration within this explosive range is referred to as the lower
explosive limit (LEL), and the maximum concentration is referred to as the upper explosive limit (UEL).

Gas alarm setpoints for combustible gases

Example of lower explosive limit (LEL) and upper explosive limit (UEL) for hydrogen (H2)

Alerting to the danger is too late if the combustible gas
concentration has already reached the lower explosive limit (LEL)!

LEL(4 vol%)May cause
explosion!

◆ Definition of acceptable concentration

Airborne concentrations of chemical substances underwhich it is believed that nearly all workers may
be repeatedly exposed in the workplace without
adverse effects

Explosive range

Concentration management is essential to notify users of the presenceof combustible gas before the concentration reaches the lower
explosive limit.
0 vol%

Exemplified Standards concerning the Safety Regulations for General
High Pressure Gas stipulate the following alarm setpoint for combustible
gases to manage concentrations below the lower explosive limit:• A value not exceeding 1/4 of the lower explosive limit

UEL(75 vol%)

0 %LEL= 0 vol%

Similarly, the Exemplified Standards concerning the Safety Regulations for General High Pressure Gas describe alarm setpoints for
toxic gases as follows:• Values not exceeding the allowable concentration (two times the allowable concentration in cases in which preparing
the calibration gas is impractical)

50 vol%100 vol%

Alarm setpoint
25 %LEL

100 %LEL= 4 vol%

Acceptable concentrations are recommended by
the ACGIH (American Conference of Governmental
Industrial Hygienists) and the Japan Society for
Occupational Health, and Riken Keiki uses the ACGIH
acceptable concentrations.

◆ Types of acceptable concentrations

TWA(Time Weighted
Average)

STEL(Short-Term
Exposure Limit)

C(Ceiling value)

The time-weighted average concentration for aconventional 8-hour workday and a 40-hour work
week, to which it is believed that workers may berepeatedly exposed without adverse effectA short-term exposure limit for which no adverse
effects are experienced, provided exposure does
not exceed 15 minutes, with at least 60 minutes
between successive exposures, and occurs no morethan four times per day
The upper limit that must not be exceeded◆ Detection target combustible gas list
Substance nameChemical formula

Flash point (°C)

Ignition point (°C)

Explosive limit (vol%)Lower limit
Upper limit

Vapor density

Acetylene

C2H2

gas

305

1.5

100

0.9

Acetone

C3H6O

-20

539

2.15

14.3

2.0

Isobutane

C4H10

gas

460

1.8

9.8

2.0

Ethanol

C2H6O

12

400

3.3

19

1.6

Ethane

C2H6

gas

515

3.0

15.5

1.0

Ethylene

C2H4

gas

440

2.7

36.0

1.0

o-Xylene

C8H10

30

470

1.0

7.6

3.7

Ethyl acetate

C4H8O2

-4

470

2.1

12.8

3.0

Cyclohexane

C8H16

-17

245

1.3

8.3

2.9

Colorless, odorless gas

Cyclopentane

C5H10

-37

320

1.4

—

2.4

Poorly soluble in water

Dimethyl ether

C2H6O

gas

240

3.0

32

1.6

Hydrogen

H2

gas

560

4.0

75

0.1

Molecular weight: 28

Styrene

C8H8

30

490

1.1

8.0

3.6

Tetrahydrofuran

C4H8O

-14

230

2.0

12.4

2.5

Carbon monoxide (CO)Carbon monoxide combines with the hemoglobin inside red blood cells, blocking oxygen transport within the body. Exposure
produces symptoms of poisoning. These symptoms include headache, nausea, dizziness, tinnitus, perspiration, and general fatigue.
◆ CO chemical properties

Specific gravity: 0.97 (virtually identical to air)Toluene

C7H8

4

530

1.2

7.8

3.1

TLV: 25 ppm: (ACGIH: American Conference of Government Industrial Hygienists)

1,3-butadiene

C4H6

gas

420

1.1

16.3

1.9

Lower explosive limit (LEL): 12.5 vol%Propane

C3H8

gas

450

2.0

10.9

1.6

Propylene

C3H6

gas

455

2.0

11.1

1.5

N-hexane

C6H14

-22

223

1.2

7.5

3.0

N-heptane

C7H16

-7

204

1.1

6.7

3.5

Benzene

C6H6

-11

498

1.2

8.6

2.7

Methyl methacrylate

C5H8O2

10

430

1.7

12.5

3.6

Methanol

CH4O

9

440

5.5

36

1.1

Methane

CH4

gas

600

5.0

15.0

0.6

Methyl isobutyl ketone

C6H12O

16

475

1.2

8.0

3.5

◆ Carbon monoxide (CO) concentration and symptoms of

CO poisoning

CO concentrationin the air

Inhalation time and symptoms

0.02% (200 ppm)

Mild frontal headache within 2–3 hours

0.04% (400 ppm)

Frontal headache and nausea within 1–2 hours;
occipital headache within 2.5–3.5 hours

0.08% (800 ppm)

Headache, dizziness, nausea, and convulsions within
45 minutes; loss of consciousness within 2 hours

0.16% (1,600 ppm)

Headache, dizziness, and nausea within 20 minutes;
death within 2 hours

0.32% (3,200 ppm)

Headache and dizziness within 5–10 minutes;
death within 30 minutes

0.64% (6,400 ppm)

Headache and dizziness within 1–2 minutes;
death within 15–30 minutes

1.28% (12,800 ppm)

Death within 1–3 minutes

Source: FY2020 project on CO poisoning prevention technologies commissioned by METI

* Individual values may vary depending on the source.
Reference: Technical Recommendation of National Institute of Occupational Safety and Health JNIOSH-TR-No.44 (2012) Users’ Guidelines for Installations for Explosive Atmospheres in General Industry (Issued November 1,
2012)
However, lower explosive limit values are provided based on Riken Keiki internal standards.

53

54

Gas Hazards
What are anoxia and hydrogen sulfide poisoning?
◆ Detection target toxic gas list
Detection target gas
ArsineChemicalformulaThe Ordinance on Prevention of Anoxia, etc. defines anoxia and hydrogen sulfide poisoning as follows:
Japan Society for Occupational Health guidelines

ACGIH guidelines
Acceptable concentration (TLV)*1
TWA

STEL

C

AsH3

5 ppb

—

—

Riken Keiki standards

Acceptable concentration*1

Detection range*2

Alarm setpoint*2

0.01 ppm

0 - 50 ppb

10 ppb

Phosphine

PH30.05 ppm—

0.15 ppm

0.3 ppm

0 - 0.15 ppm

0.05 ppm

Diborane

B2H6

0.1 ppm——

0.01 ppm

0 - 0.3 ppm

0.1 ppm

Silane

SiH4

5 ppm

—

—

100 ppm

0 - 15 ppm

5 ppm

Disilane

Si2H6

—

—

—

—

0 - 15 ppm

5 ppm

Germane

GeH4

0.2 ppm———

0 - 0.8 ppm

0.2 ppm

Hydrogen selenide

H2Se

0.05 ppm——

0.05 ppm

0 - 0.2 ppm

0.05 ppm

Nitrogen trifluoride

NF3

10 ppm———0 - 30 ppm

10 ppmBoron tribromide

BBr3

—

—

0.7 ppm—

HBr 0 - 6 ppm

HBr 2 ppm

Arsenic trichloride

AsCl3

—

—

—

—

HCl 0 - 6 ppm

HCl 2 ppm

Arsenic pentachloride

AsCl5

—

—

—

—

HCl 0 - 6 ppm

HCl 2 ppm

Boron trichloride

BCl3

—

—

0.7 ppm—

HCl 0 - 6 ppm

HCl 2 ppm

Germanium tetrachloride

GeCl4

—

—

—

—

HCl 0 - 6 ppm

HCl 2 ppm

Molybdenum pentachloride

MoCl5

—

—

—

—

HCl 0 - 6 ppm

HCl 2 ppm

PCl3

0.2 ppm

PCl5

0.1 ppm

Phosphorus trichloride
Phosphorus pentachloride

0.5 ppm———

0.2 ppm
0.1 ppm

HCl 0 - 6 ppm
HCl 0 - 6 ppm• Anoxia
The state in which symptoms are observed due toinhalation of air of oxygen concentration below 18 %Normal alarm setpoints are set to 18 % in accordance with the Ordinance on Prevention of Anoxia, etc.
Oxygen deficiency symptoms
Oxygenconcentration
(%)
20.93

HCl 2 ppm
HCl 2 ppm

Phosphorus oxychloride

POCl3

0.1 ppm———

HCl 0 - 6 ppm

HCl 2 ppm

Antimony pentachloride

SbCl5

—

—

—

—

HCl 0 - 6 ppm

HCl 2 ppm

Silicon tetrachloride

SiCl4

—

—

—

—

HCl 0 - 6 ppm

HCl 2 ppm

Dichlorosilane

SiH2Cl2

—

—

—

—

HCl 0 - 6 ppm

HCl 2 ppm

Trichlorosilane

SiHCl3————

HCl 0 - 6 ppm

HCl 2 ppm

Tin tetrachloride

SnCl4

—

—

—

—

HCl 0 - 6 ppm

HCl 2 ppm

Tungsten hexachloride

WCl6

—

—

—

—

HCl 0 - 6 ppm

HCl 2 ppm

Tungsten hexafluoride

WF6

—

—

—

—

HF 0 - 1.5 ppm

HF 0.5 ppm

Arsenic trifluoride

AsF3

—

—

—

—

HF 0 - 1.5 ppm

HF 0.5 ppm

Arsenic pentafluoride

AsF5

—

—

—

—

HF 0 - 1.5 ppm

HF 0.5 ppm

Boron trifluoride

BF3

0.1 ppm—

0.7 ppm

0.3 ppm

HF 0 - 1.5 ppm

HF 0.5 ppm

Molybdenum hexafluoride

MoF6

—

—

—

—

HF 0 - 1.5 ppm

HF 0.5 ppm

Phosphorus pentafluoride

PF5

—

—

—

—

HF 0 - 1.5 ppm

HF 0.5 ppm

Sulfur tetrafluoride

SF4

—

—

0.1 ppm—

HF 0 - 1.5 ppm

HF 0.5 ppm

Silicon tetrafluoride

SiF4

—

—

—

—

HF 0 - 1.5 ppm

HF 0.5 ppm

Hydrogen chloride

HCl

—

—

2 ppm

2 ppm

0 - 6 ppm

2 ppm
HF 0.5 ppm

Hydrogen fluoride

HF

0.5 ppm

—

2 ppm

3 ppm

HF 0 - 1.5 ppm

Hydrogen bromide

HBr

—

—

2 ppm

—

0 - 6 ppm

2 ppm

Hydrogen iodide

HI

—

—

—

—

0 - 5 ppm

1.5 ppm

Chlorine

Cl2

0.1 ppm

0.4ppm

—0.5 ppm

0 - 0.3 ppm

0.1 ppm

Fluorine

F2

0.1 ppm—

0.5 ppm—

0 - 3 ppm

1 ppm

BromineBr2

0.1 ppm

0.2 ppm—

0.1 ppm

0 - 1 ppm

0.3 ppm

Chlorine trifluoride

ClF3

—

—

0.1 ppm—

0 - 0.3 ppm

0.1 ppm

Ozone

O3

0.1 ppm——

0.1 ppm

0 - 0.6 ppm

0.1 ppm

Nitrogen monoxideNO

25 ppm———0 - 100 ppm

25 ppmNitrogen dioxideNO2

0.2 ppm——

Pending

0 - 9 ppm

3 ppm

Sulfur dioxide

SO2—0.25 ppm—

Pending

0 - 6 ppm

2 ppm

Hydrogen sulfide

H2S

1 ppm

5 ppm

—

5 ppm

0 - 3 ppm

1 ppm

Carbon monoxideCO

25 ppm——50 ppm0 - 75 ppm

25 ppmAmmoniaNH3

25 ppm35 ppm—25 ppm0 - 75 ppm

25 ppmMonomethylamine (MMtA)

CH5N

5 ppm

15 ppm—10 ppm0 - 15 ppm

5 ppm

Dimethylamine (DMA)

C2H7N

5 ppm

15 ppm—2 ppm

0 - 15 ppm

5 ppm

Trimethylamine (TMA)

C3H9N

5 ppm

15 ppm——0 - 15 ppm

5 ppm

Diethylamine (DEA)

C4H11N

5 ppm

15 ppm—10 ppm0 - 15 ppm

5 ppm

Hydrogen cyanide

HCN

—

—

4.7 ppm

5 ppm

0 - 15 ppm

4 ppm

Hydrogen peroxide

H2O2

1 ppm

—

—

—

0 - 3 ppm

1 ppm

• Hydrogen sulfide poisoning
The state in which symptoms are observed due toinhalation of air of hydrogen sulfide concentration
exceeding 10 parts per million (10 ppm)

18

16 - 12

Hydrogen sulfide poisoning symptoms
Symptoms

Atmospheric oxygen concentration
Lower safety limit; continuous ventilation, oxygen concentration
measurement, safety harnesses, and protective breathing equipment
must be provided in the work environment.

Increased pulse and respiration rate, impaired concentration, errors
in simple arithmetic, impaired manual dexterity, impaired muscularstrength, headache, tinnitus, retching, nausea

14 - 9Impaired judgment, elation, unstable mental state, frequent sighing,abnormal fatigue, inebriation, headache, nausea, vomiting,loss of current memory, loss of feeling of pain, general weakness,increased body temperature, cyanosis, stupor,
risk of death due to falling from steps/ladders or drowning

10 - 6

Nausea, vomiting, loss of ability to move freely, inability to move orcall out for help, collapse, hallucination, cyanosis, loss of
consciousness, fainting, central nervous system disorder,
generalized convulsions, risk of death

6 or less

A few gasping breaths followed by fainting/loss of consciousness, slowed/stopped
respiration, convulsions, heart arrest, death

Hydrogen sulfide
concentration(ppm)

Symptoms

0.025

Threshold of odor perception

0.2

Unmistakable odor

3-5Moderately unpleasant odor

10

Lower limit for irritation to eyes

20 - 30

Inability to sense intensity for higher concentrations due to becoming accustomized
with odor
Lower limit for irritation to lungs

100 - 300

Paralysis of olfactory sense within 2–15 minutes reduces sense of
unpleasant odor.
h
CougKeratoconjunctivitis (“gas eye”), itchy eyes, pain, feeling of sand in eyes,
sensation of brightness, bloodshot/swollen eyes, membrane opacity,
retinal damage/separation, distorted/cloudy vision, increased pain due
to light
Continuous exposure for 8–48 hours leads to bronchial inflammation, pneumonia, andsuffocation due to pulmonary edema.
Burning pain in airway membranes
Limit for serious symptoms provided exposure does not exceed 1 hour

350 - 600

Risk of death due to exposure between 30 minutes and 1 hour.

700 - 1,000

Short-interval respiration immediately followed by respiratory paralysis, loss of
consciousness, fainting, respiratory arrest, and death

5,000

Immediate death

Reference: New textbook for operations chiefs of hazardous work of oxygen deficiency (3rd edition, October 26, 2007)

The importance of maintenanceGas detector maintenance performed at regular intervals is critical maintaining
product performance and to improving reliability in terms of disaster prevention
and safety. Continuing to use the product without maintenance will prevent
accurate detection.
Maintenance comprises daily and monthly maintenance performed byworkers and regular maintenance performed by Riken Keiki service engineers.
Daily maintenance consists of visual checks performed by workers before
commencing work. Monthly maintenance consists of checking (alarm testing)of the alarm circuits performed by workers. Regular maintenance involves
maintenance such as span adjustment performed once every six months tomaintain product performance as a safety device.
Proper maintenance will contribute to maintaining device performance andfunction for extended periods and ensuring safety against gas-related disasters.

*1: For more information on acceptable concentrations recommended by the ACGIH (American Conference of Government Industrial Hygienists), refer to “2022 TLVs R and BEIs R”. For more information on acceptableconcentrations recommended by the Japan Society for Occupational Health, refer to the Journal of Occupational Health, Vol. 61 No. 5, May 2019. Riken Keiki uses ACGIH acceptable concentrations.
TWA: Time Weighted Average (The time-weighted average concentration for a conventional 8-hour workday and a 40-hour work week, to which it is believed that workers may be repeatedly exposed without adverse
effect)
STEL: Short Term Exposure Limit (A short-term exposure limit for which no adverse effects are experienced, provided exposure does not exceed 15 minutes, with at least 60 minutes between successive exposures, andoccurs no more than four times per day)C:
Ceiling (Concentration that must not be exceeded even momentarily. Upper limit.)*2: For gases that hydrolyze, the detection range and alarm setpoints are indicated for the gases produced after hydrolysis of the detection target gas.

55

56

Related Laws and Regulations (JAPAN)
In the work environments where combustible gases, toxic gases and other hazardous gases are used, it is mandatory to install gas detector
to measure them in order to secure safety. This section provides excerpt of the laws and regulations relating to gas detector.
High Pressure Gas Safety Act(act no. 204 of June 7, 1951)
Latest Amendments: Act No. 42 of June 2, 2017
Chapter I General Provisions
Article 1 (purpose)
The purpose of this Act is to regulate the production, storage, sale, transportation and other mattersrelated to the handling of high pressure gases, their consumption as well as the manufacture andhandling of their containers and to encourage voluntary activities by private businesses and the High
Pressure Gas Safety Institute of Japan for the safety of high pressure gases with the aim of securing
public safety by preventing accidents and disasters caused by high pressure gases.
Article 2 (definitions)
The term "high pressure gas" as used in this Act means any gas that falls under any of the following
items:(i) Compressed gas, the pressure (meaning gauge; the same shall apply hereinafter) of which is
not less than 1 megapascal at its normal operating temperature and which is currently not lessthan 1 megapascal, or compressed gas, the pressure of which is not less than 1 megapascal at atemperature of 35 degrees Celsius (except compressed acetylene gas in both cases);(ii) Compressed acetylene gas, the pressure of which is not less than 0.2 megapascal at its normal
operating temperature and which is currently not less than 0.2 megapascal, or compressed
acetylene gas, the pressure of which is not less than 0.2 megapascal at a temperature of 15
degrees Celsius;(iii) Liquefied gas, the pressure of which is not less than 0.2 megapascal at its normal operating
temperature and which is currently not less than 0.2 megapascal, or liquefied gas, the temperature ofwhich is 35 degrees Celsius or less in the case that the pressure is 0.2 megapascal; or(iv) In addition to what is listed in the preceding item, those liquefied gases, the pressure of which
exceeds zero Pascal at a temperature of 35 degrees Celsius, and which, inclusive of liquefiedhydrogen cyanide and liquefied methyl-bromide, are specified by a Cabinet Order.

Cabinet Order of High Pressure Gas Safety Act(cabinet order no. 20 of February 19, 1997)
Latest Amendments: Cabinet Order No. 198 of July 20, 2017
Article 7 (type of high pressure gas specified in cabinet order)
The types of gases, among those high pressure gases of Paragraph 1 of Article 24-2 of the Act,
specifically specified in a Cabinet Order as requiring special care for the prevention of accidents intheir consumption shall be the following gases in compressed and liquefied form:(i) silane(ii) phosphine(iii) arsine(iv) diborane(v) hydrogen selenide(vi) monogermane(vii) disilene

Safety Regulations for General High Pressure Gas(ministry of international trade and industry ordinance no. 53 of May 25, 1966)
Latest Amendments: Ministry of Economy, Trade and Industry Ordinance No. 48
of July 17, 2018(ii) “toxic gases” shall mean: acrylonitrile, acrolein, sulfurous acid gas, arsine, ammonia, carbon
monoxide, chlorine, chloromethyl, chloroprene, arsenic pentafluoride, phosphorus pentafluoride,
ethylene oxide, nitrogen trifluoride, boron trifluoride, phosphorus trifluoride, hydrogen cyanide,
diethylamine, disilene, sulfur tetrafluoride, silicon tetrafluoride, diborane, hydrogen selenide,
trimethylamine, carbon disulfide, fluorine, bromomethyl, benzene, phosgene, phosphine,monogermane, silane, monomethylamine, hydrogen sulfide and other gases with poisonous
substances provided in Article 2, paragraph (1) of Poisonous and Deleterious Substances ControlAct.
(iii) “special high pressure gases” shall mean: arsine, disilene, diborane, hydrogen selenide,phosphine, monogermane and silane.
(iv) “inert gases” shall mean: helium, neon, argon, krypton, xenon, radon, nitrogen, carbon dioxide or
fluorocarbon (excluding combustible gases).
Chapter II Permission, etc. concerning Production or Storage of High Pressure Gas
Section 1 Permission, etc. concerning Production of High Pressure Gas
Article 6 (technical standards concerning stationary production equipment)
Technical standards specified by an Ordinance of METI as referred to in Article 8, item (1) of the Act
for the production facilities made up of stationary production equipment (excluding cold evaporator,
compressed natural gas station, liquefied natural gas station and compressed hydrogen station)
shall be as follows, provided, however, that this shall not apply in case of taking any safety measure
which is approved by the Minister of Economy, Trade and Industry as having an equivalent effect, andrefrigerating equipment for cooling of production equipment may be subject to the technical standards
specified by the Regulations for Refrigeration Safety.
(xxvi) Electrical equipment concerning high pressure gas equipment for combustible gases (excluding
ammonia and bromomethyl) shall be of a structure having explosion-proof capabilities suitablefor its installation place and the type of the gas.
(xxxi) Production facilities of combustible gases, toxic gases (limited to gases specified by the Ministerof Economy, Trade and Industry in the public notice) or specific inert gases shall be installed withequipment to detect leak of such gases and trigger an alarm at places where gases leaked fromsuch production facilities may accumulate.
(xxxvi) Piping concerning gas equipment for special high-pressure gas, arsenic pentafluoride, etc.,
sulfurous acid gas, ammonia, chlorine, chloromethyl, ethylene oxide, hydrogen cyanide,phosgene or hydrogen sulfide shall, wherever necessary, of double tube construction
depending on the type, properties and pressure of these gases as well as on the nearby
situation of the piping (including the concentrated condition of type 1 safety properties andtype 2 safety properties in the vicinity of the business where the piping is installed), andnecessary measures shall be taken to detect the leakage of the gas from such double tube,
provided, however, that this shall not apply if the piping is prevented from being damaged
by installing in a sheath or other protective structure and measures are taken to prevent any
leaked gas from spreading to the vicinity.
Chapter VIII Notification concerning Consumption of High Pressure Gas
Article 55 (technical standards concerning consumers of specific high pressure gas)Technical standards specified by an Ordinance of METI as referred to in Paragraph 1 of Article 24-3 ofthe Act shall be as follows.
(xxiv) Piping concerning consumption equipment for special high-pressure gas, liquefied ammonia
or liquefied chloride shall, wherever necessary, of double tube construction depending on thetype, properties and pressure of these gases as well as on the nearby situation of the piping(including the concentrated condition of type 1 safety properties and type 2 safety properties
in the vicinity of the business where the piping is installed), and necessary measures shallbe taken to detect the leakage of the gas from such double tube, provided, however, that thisshall not apply if the piping is prevented from being damaged by installing in a sheath or otherprotective structure and measures are taken to prevent any leaked gas from spreading to thevicinity.
(xxvi) Consumption facilities shall be installed with equipment to detect leak of such gases andtrigger an alarm at places where gases leaked from such production facilities may accumulate.

Chapter I General Provisions
Article 1 (scope)This is to set forth, based on the High Pressure Gas Safety Act (act no. 204 of 1951, hereinafterreferred to as the “Act”), the regulations on the safety (excluding the safety on the production of highpressure gases pertaining to the specific production businesses specified in the Safety Regulations
for Industrial Complex, etc. (ministry of international trade and industry ordinance no. 88 of 1986)) on
the high pressure gases (excluding high pressure gasses subject to the provisions of Regulations forRefrigeration Safety (ministry of international trade and industry ordinance no. 51 of 1966) and Safety
Regulations for Liquefied Petroleum Gas (ministry of international trade and industry ordinance no. 52
of 1966): the same shall apply hereinafter).
Article 2 (definitions)
For the purpose of these regulations, the terms listed in the following items shall be defined asfollows:(i) “combustible gases” shall mean: acrylonitrile, acrolein, acetylene, acetaldehyde, arsine,ammonia, carbon monoxide, ethane, ethylamine, ethyl benzene, ethylene, ethyl chloride, vinyl
chloride, chloromethyl, ethylene oxide, propylene oxide, hydrogen cyanide, cyclopropane,
disilene, diborane, dimethylamine, hydrogen, hydrogen selenide, trimethylamine, carbon disulfide,
butadiene, butane, butylene, propane, propylene, bromomethyl, benzene, phosphine, methane,monogermane, silane, monomethylamine, methyl ether, hydrogen sulfide and other gases fallingunder either of the following a. or b.(except Fluoroolefin 1234yf and Fluoroolefin 1234ze)
a. The lower explosion limit (meaning the explosion limit when mixed with air: the same shallapply hereinafter) being 10% or lessb. The difference between the upper limit and lower explosion limit being 20% or more

57

Exemplified Standards concerning Safety Regulations for General High
Pressure Gas(enacted on March 26, 2001, amended on July 1, 2019)23. Gas leakage detection and alarm equipment and place of installation
Relevant provisions

Article 6 paragraph 1 item (xxxi), Article 7 paragraph 1 item (i), Article 7-3
paragraph 1 item (vii), paragraph 2 item (xvi), Article 12 paragraph 1 item (i), Article
8-2 paragraph 1 item (i), paragraph 2 item (ii) a, Article 12 paragraph 1 item (i),Article 12-2 paragraph 1 item (i), paragraph 2 item (i), Article 12-3 paragraph 1 item(i), paragraph 2 item (iii) a, Article 22 the main sentence, item (ii), item (iiii), Article
22, Article 55 paragraph 1 item (xxvi)
Equipment to detect and trigger an alarm of any leakage of combustible gases and toxic gases(acrylonitrile, sulfurous acid gas, arsine, ammonia, carbon monoxide, chlorine, ethylene oxide,
disilene, diborane, hydrogen selenide, carbon disulfide, benzene, phosphine, monogermane, silane
and hydrogen sulfide) or specific inert gases at production facilities, storage places and consumption
facilities shall be in accordance with the following standards.

Related Laws and Regulations (JAPAN)
1. Function
Gas leakage detection and alarm equipment (hereinafter referred to as “Detection alarm equipment”
in 23 of these Standards) shall be capable of detecting leakage of combustible gases, oxygen, toxic
gases or specific inert gases, indicating its concentration as well as triggering an alarm and shallhave the following capabilities.
1.1 Detection alarm equipment shall be of catalytic combustion method, membrane type galvanic
cell method, semi-conductor method or any other method to automatically trigger an alarmat the preset gas concentration (hereinafter referred to as “Alarm setpoint”) by detecting thechange of detection element by an electrical mechanism.
1.2 Alarm setpoint shall be a quarter or less of a lower explosive limit for combustible gases
or specific inert gases, 25% for oxygen and acceptable concentration (twice the value of
acceptable concentration for ammonia, chlorine and other toxic gases similar thereto withdifficulty to prepare the calibration gas; the same shall apply to 1.6) or less for toxic gases,
provided, however, that it shall be 0.1% or less for the Detection alarm equipment to be installed
pursuant to 3.1 (6) c.
In this case, Alarm setpoint shall be able to be set at any value.
1.3 The gas alarm accuracy of Detection alarm equipment shall be ±25% or less for combustible
gases or specific inert gases, ±5% or less for oxygen and ±30% or less for toxic gases of theAlarm setpoint.
1.4 The delay time for the Detection alarm equipment to trigger an alarm shall be inspected byapplying the alarm delay test under the provision 6.7.2 of JIS M7626 (1994) correspondingly.
This inspection shall be conducted by introducing the gas 1.6 times of the concentration of theAlarm setpoint and the delay then shall be within 30 seconds, provided, however, that it shallbe within one minute for specific gases which delay more than that for the structure of the
Detection alarm equipment or for theoretical reasons (ammonia, carbon monoxide or any othergases equivalent thereto).
1.5 Alarm accuracy shall not deteriorate even when there are ±10% fluctuations of power voltage,etc.
1.6 The scale of indicator shall, within each scale range, clearly indicate 0 to lower explosive limit
for combustible gases or specific inert gases (for those with the Alarm setpoint being low
concentration, proper value of the lower explosive limit or less can be set in considerationof such Alarm setpoint), 0 to 50% for oxygen and 0 to three times the value of acceptableconcentration for toxic gases.
1.7 Once an alarm is triggered, the alarm shall, in principle, continue even upon the change of gas
concentration in the atmosphere and shall stop only by its inspection or measures to be taken.
1.8 Detection alarm equipment shall be regularly maintained in accordance with maintenanceparticulars described in instruction manuals or specifications. The results of maintenance shallalso be recorded and retained for three years or more.
1.9 Calibration of the reading of gas leakage detection alarm equipment for special high-pressure
gas shall be carried out at least once every six months.
1.10 Detection alarm equipment shall be checked at least once a month for triggering of an alarm
upon the alarm circuit inspection and at least once a year for the proper operation by thedetection and alarm inspection.
2. Construction
The construction of Detection alarm equipment shall be as follows.
2.1 It shall have sufficient strength (element and transmission circuit being particularly durable) andshall be easy to handle and maintain (particularly for the replacement of element, etc.)
2.2 The parts which come into contact with gases shall be made of corrosion-resistant materials
or materials with sufficient anticorrosion treatment and other parts shall be finished with goodcoating or plating.
2.3 For explosion proof property, it shall have passed the test under Article 44-2 of Industrial Safety
and Health Act (act no. 57 of 1972).
2.4 In the case of receiving alarms from two or more probes, receiving circuit shall be able to trigger
an alarm if it is under the condition to activate the Detection alarm equipment and such point shallbe identifiable even when the other triggers an alarm and activate the circuit.
2.5 Receiving circuit shall be made easily identifiable of it being activated.
2.6 Alarm shall trigger an alarm simultaneously with turning on or blinking of a lamp.
3. Installation place
Detection alarm equipment shall be installed as follows.
3.1 Installation place and quantity of probes of Detection alarm equipment in the production
facilities (excluding piping: the same shall apply hereinafter in 3.1) shall be in accordance withthe following items:(1) In the circumference of a place where there are indoor-installed compressor, pump, reaction
equipment, storage tank and other high-pressure gas equipment with high potential for gas
leakage (excluding those specified in (3)) and where leaked gas is likely to accumulate: Oneor more per 10 meter circumference of these equipment group;(2) If those high-pressure gas equipment as referred to in (1) are installed outdoor and areclose to other high-pressure equipment, walls or other structures, or are installed inside a
pit or the like, a place where leaked gas is likely to accumulate: One or more per 20 metercircumference of these equipment group;(3) A place where leaked gas is likely to be accumulated in the circumference of production
facilities including fire source such as a heating furnace: The number calculated by the ratioof one or more per 20 meter circumference of the place;(4) Inside an instrument room (excluding the case where measure(note) is taken to prevent
penetration of leaked gas): One or more;(5) In the circumference of a group of filling ports of toxic gases: One or more;(note) In principle, the measure to prevent penetration of leaked gas shall mean either ofthe following:a. To retain the pressure inside the instrument room necessary for preventing penetration ofgases from outside; orb. To raise the entrance floor to at least 2.5 meters over the ground for the instrument room
only for gases heavier than air.
(6) Notwithstanding the foregoing (1) to (5), the following standards shall apply to compressedhydrogen stations of Article 7-3 paragraph 2 and Article 12-2 paragraph 2 anda. One or more inside a steel casing or inside a fireproof room in which compressor is installed,provided, however, that for such fireproof room of which inside wall dimension exceeds 10
meters, the quantity shall be one or more for every 10 meters in such length;

3.2

3.3

3.4
3.5

b. One or more inside the dispenser case;c. One each or more of Detection alarm equipment having one or more probes near theconnection part such as the coupling between the filling hose and the container fixed onto
a vehicle (see Fig.1);
d. One or more on the upper piping module of accumulator (see Fig.2);
e. One or more at a place where hydrogen is accumulated near the device to generatehydrogen such as a reformer.
Installation place and quantity of probes for Detection alarm equipment in a repository or
consumption facilities (excluding piping; the same shall apply hereinafter in 3.2) shall be inaccordance with the following items:(1) In the circumference of a place where there are indoor-installed decompression equipment,
storage equipment, consumption equipment (excluding part of burners, etc. which areequipped with an interlocking mechanism of pilot burner method and not likely to cause gas
leakage) and other equipment with high potential for gas leakage and where leaked gas is
likely to accumulate: One or more per 10 meters of the circumference of these equipmentgroup;(2) If those equipment as referred to in (1) are installed outdoor and are close to otherequipment, walls or other structures, or are installed inside a pit or the like, a place whereleaked gas is likely to accumulate: One or more per 20 meter circumference of theseequipment group;(3) If containers for special high-pressure gas, etc. are stored at a container depot: One ormore in the circumference of a place of the container group where leaked gas is likely toaccumulate;(4) Inside a cylinder cabinet: One or more.
The height for the probe to be installed for the facilities of 3.1 or 3.2 shall be determined inaccordance with conditions such as specific gravity of the gas, environment, height of gas
equipment and so on.
A place where alarm is triggered and lamp is turned on or blinks shall be where parties
concerned are stationed and is suitable for taking various countermeasures upon an alarm.
In cases where forced exhaust equipment is operated around the clock in production or
consumption facilities, the provisions of 3.1 and (1), (2), (3) of 3.2 shall not apply and a probe
shall be installed for every inlet of forced exhaust equipment.
Probe installation range Pressure Safety
Accumulator

Installation range of probe

Main valve

gauge

Pressure
relieve valve

valve

Base to fix
accumulator

Base to fix
equipment

Belt to fix
accumulator

HydrogenFig.1 Example of Installation near
the Connection like a Coupling

Frame

Shutdown valve

Excessflow valve

Fig.2 Example of Installation at
Piping Module of Accumulators, etc.

27. Double tube for toxic gas piping

Relevant provisions
Article 6 paragraph 1 item (xxxvi), Article 12 paragraph 1 item (i), Article 22 the main
sentence, Article 55 paragraph 1 item (xxiv)
With regard to double tube construction for gas equipment piping of special high-pressure gas,arsenic pentafluoride, etc., sulfurous acid gas, ammonia, chlorine, chloromethyl, ethylene oxide,hydrogen cyanide, phosgene and hydrogen sulfide, the following items shall apply:
1. Outer tube of the double tube construction shall have the standard inside diameter of 1.2 times
or more of the outside diameter of the inner tube and material, wall thickness, etc. shall conformto the specifications under 7. Breakdown test and airtightness test, 8. Strength of high-pressure
gas equipment and conduit, and 9. Standards of materials used for gas equipment, etc.
2. Any of the following measures shall be taken between the inside tube and outside tube of the
double tube to detect leakage of gases:
2.1 To install a probe of gas leakage detection and alarm equipment between the inside tube andoutside tube of the double tube;
2.2 To install a device to detect and alarm the rise of pressure between the inside tube and outside
tube of the double tube;
2.3 To run inert gas such as nitrogen all the time between the inside tube and outside tube of the
double tube, and to install a probe of gas leakage detection alarm equipment on its outlet; or
2.4 To suction between the inside tube and outside tube of the double tube all the time by exhaustequipment, etc. and to install a probe of gas leakage detection alarm equipment on its outlet.

Industrial Safety and Health Act(act no. 57 of June 8, 1972)
Latest Amendments: Act No. 78 of july 25, 2018
Chapter I General Provisions
Article 1 (purpose)
The purpose of this Act is to secure, in conjunction with the Labor Standards Act (act no. 49 of
1947), the safety and health of workers in workplaces, as well as to facilitate the establishment of
comfortable working environment, by promoting comprehensive and systematic countermeasuresconcerning the prevention of industrial accidents, such as taking measures for the establishment ofstandards for hazard prevention, clarifying the safety and health management responsibility and thepromotion of voluntary activities with a view to preventing industrial accidents
Chapter IV Measures for Preventing the Dangers or Health Impairment ofWorkers
Article 20 (measures to be taken by employers, etc.)
The employer shall take necessary measures for preventing the following dangers:(i) Dangers due to machines, instruments and other equipment (hereinafter referred to as"machines, etc.")

58

Related Laws and Regulations (JAPAN)(ii) Dangers due to substances of an explosive nature, substances of a combustible nature andsubstances of an combustible nature(iii) Dangers due to electricity, heat and other energy
Chapter V Regulations concerning Machines, etc. and Harmful Substances
Section 1 Regulations concerning Machines
Article 42 (restrictions on transfer, etc.)
Among machines, etc., other than specified machines, etc., which are listed in Appended Table 2, or
require dangerous or harmful operations, or are used in a dangerous place, or used for preventing
danger or health impairment, those defined by Cabinet Order shall not be transferred, leased or installed
unless they conform to the construction code provided for by the Minister of Health, Labour and Welfare
or are equipped with safety apparatus designated by the Minister of Health, Labour and Welfare.
Article 44-2 (type examination)
Of the machines, etc. as referred to in Article 42, one who has manufactured or imported a machine
which is listed in Appended Table 4 and designated by the Cabinet Order shall have such manufactured
or imported machine undergo the type examination to be conducted by the party registered by the
Minister of Health, Labour and Welfare (hereinafter referred to as the "registered type examination
agency") as prescribed by the Ordinance of the Ministry of Health, Labour and Welfare. However thisprovision shall not apply to the machines, etc., which have been imported, and which have undergone
the examination set forth in the next paragraph.

Ordinance on Industrial Safety and Health(ministry of labour ordinance no. 32 of September 30, 1972)
Latest Amendments: Ministry of Health, Labour and Welfare Ordinance
No. 68 of April 10, 2019
Part II Safety Standards
Chapter VI Prevention of Dangers in Excavating Work, etc.
Section 2 Construction Work of Tunnels, etc.
Subsection 1 Investigation, etc.
Article 382-2 (measurement, etc. of the concentration of combustible Gas)
The employer shall, in the case of a construction work of tunnels, etc., the combustible gases areliable to be generated, designate a person charged with the measurement of the concentration of
the combustible gases in order to prevent an explosion or fire and have the said person measure
and record the concentration of the combustible gas at the places where the said combustible gases
are liable to be generated or stagnate, every day before commencing the work for the day, after anearthquake of medium shock or heavier or when having found any abnormalities related to the said
combustible gases.
Article 382-3 (installation, etc. of automatic alarms)
The employer shall, when it is found as a result of the measurement set forth in the preceding Article
that the combustible gases exist and is liable to cause an explosion or fire, install automatic alarms
at necessary places for an early detection of abnormal rise in the concentration of the combustible
gases. In this case, the said automatic alarms shall have system, which is able to quickly alert
workers who are working around the area of the detector heads of the automatic alarms to theabnormal rises in the concentration of the said combustible gas.
2. The employer shall, as regards the automatic alarm device set forth in the preceding paragraph, checkthe following matters before commencing the work for the day, and immediately repair when having
found any abnormalities:(i) Abnormalities in the measuring gauges(ii) Abnormalities in detector heads(iii) Function of the alarms
Subsection 1-3 Prevention of Explosions, Fires, etc.
Article 389-2 (measures in the case of automatic alarms sound)
The employer shall establish measures in advance that the workers concerned should take to prevent
an explosion or fire due to combustible gas when the automatic alarms set forth in Article 382-3
sound, and make the said measures known to the said workers.
Part III Health Standards
Chapter I Harmful Working Environment
Article 583 (standards of concentration of carbon dioxide gas in a pit)
The employer shall ensure that the concentration of carbonic dioxide gas in the air is kept at 1.5% orless in workshop in pits. However, this shall not apply to lifesaving or danger prevention work using
air respirators, oxygen respirators or hose masks.
Article 589 (workplace to be measured for work environment)
The workshops in pits prescribed by the Ordinance of the Ministry of Health, Labour and Welfare set
forth in item (iv) of Article 21 of the Order shall be as follows:(i) Workshops in pits where carbon dioxide gas stagnates or is liable to stagnate;(ii) Workplace in a pit where temperature exceeds or is likely to exceed 28ºC;(iii) Workshops in pits provided with ventilation facilities.
Article 592 (measurement, etc., of concentration of carbon dioxide gas in a pit)
The employer shall, as regards a workshop in pit set forth in item (i) of Article 589, measureconcentration of carbon dioxide gas, periodically once every period within a month.
2. The provisions of paragraph (2) of Article 590 shall apply mutatis mutandis to the case thatmeasurements pursuant to the provision of the preceding paragraph have been carried out.

Ordinance on Prevention of Anoxia, etc.
(ministry of labour ordinance no. 42 of September 30, 1972)
Latest Amendments: Ministry of Health, Labour and Welfare Ordinance
No. 75 of June 19, 2018
In accordance with the provisions of Industrial Safety and Health Act (act no. 57 of 1972) and for the
purpose of implementing the Act, ordinance on prevention of anoxia, etc. shall be set forth as follows:
Chapter I General Provisions
Article 1 (duties of the employer)
The employer shall make efforts to establish working methods, maintain a proper working environment
and take measures necessary for preventing anoxia, etc.
Article 2 (definitions)
In this ordinance, the meanings of the terms are as defined respectively in the following items:(i) Oxygen deficiency: States under which the oxygen concentration in the air is less than 18%.
(ii) Oxygen deficiency, etc.: The state defined in the preceding item or the state in which theconcentration of hydrogen sulfide in the air is 10ppm or more.
(iii) Anoxia: The symptom observed in one who has inhaled oxygen-deficient air.
(iv) Hydrogen sulfide poisoning: The symptom observed in one who has inhaled the air in which theconcentration of hydrogen sulfide is 10 ppm or more.
(v) Anoxia, etc.: Anoxia or hydrogen sulfide poisoning.
(vi) Hazardous work of oxygen deficiency: Those jobs to be carried out in places with the hazard ofoxygen deficiency (hereinafter referred to as "oxygen-deficient place") designated in Attached
Table 6 of the Enforcement Order (hereinafter referred to as "Cabinet Order") of the Industrial
Safety and Health Law (cabinet ordinance no. 318 of 1972).
(vii) Class-1 hazardous work of oxygen deficiency: The oxygen deficiency-hazard work other thanclass-2 hazardous work of oxygen deficiency out of the oxygen-deficiency-hazard works.
(viii) Class-2 hazardous work of oxygen deficiency work: The work to be carried out in the oxygendeficiency-hazard place designated in item 3-3, item 9 or item 12 of Attached Table 6 of the
Cabinet Order (to be restricted to the places designated by the Minister of Health, Labour andWelfare as the places with the hazard of anoxia and hydrogen sulfide poisoning for the places
designated in the said items) from among the oxygen-deficiency-hazard places.

Explanation of Explosion-Proof Construction
Explosion-proof electrical equipment is currently categorized based on two types of standards.
One consists of those in accordance with “Constructional Requirements for Electrical Equipment for Explosive Atmospheres” in Ministry ofLabour Notification No. 16 of 1969, and the other consists of those in accordance with “Recommended Practices for Explosion-ProtectedElectrical Installations in General Industries” in Ministry of Health, Labour and Welfare Labor Standards Bureau Chief Notification No. 2 ofAugust 24, 2010, based on partial revision of the aforementioned notification.

[Constructional Requirements for Electrical Equipment for
Explosive Atmospheres]
Name of explosion-proof construction and corresponding symbol for
explosion-proof electrical devices satisfying certification

Article 4 (measuring instruments)
When the employer has workers engage in hazardous work of oxygen-deficiency, he shall provide theinstruments necessary for measurement of oxygen concentration in the air stipulated in Paragraph 1of the preceding Article, or shall take measures for enabling the workers to easily make use of said
instruments.
Article 5 (ventilation)
The employer whose workers engage in hazardous work of oxygen deficiency shall keep theconcentration of oxygen in the air at least at 18% or more in the workplace (the concentration of theoxygen shall be 18% or more, and the concentration of the hydrogen sulfide, less than 10 ppm in thecase of class-2 hazardous work of oxygen deficiency) by installing an appropriate ventilating system
except in cases where a ventilating system cannot be installed in order to prevent explosion oroxidization, etc., and where it is extremely difficult to install a ventilating system due to the nature of
the work to be carried out.
2. The employer shall not be allowed to use pure oxygen while the workplace is ventilated conforming to
the provision of the preceding paragraph.

Type of explosion-proof construction

SymbolType of explosion-proof construction

Symbolia or ib

Intrinsically safe explosion-proof construction

ia or ib

Flame-proof enclosuredFlame-proof enclosure

Internal-pressure explosion-proof construction

fInternal-pressure explosion-proof construction

px or py

Increased safety explosion-proof constructioneIncreased safety explosion-proof constructioneOil-filled explosion-proof constructionoOil-filled explosion-proof constructionoNon-ignition explosion-proof constructionnA or nC or nR or nL

Non-ignition explosion-proof constructionnA or nC or nR or nL

Resin-filled explosion-proof construction

ma or mb

Resin-filled explosion-proof construction

ma or mb

Special explosion-proof constructionsSpecial explosion-proof constructions

Explosion-proof class type for combustible gas vapor
Explosion-proof
class

Explosion-proof electrical deviceclassification corresponding to maximum
safe gap*3

Flame propagation limit (mm)1Over 0.6

2Over 0.4 and 0.6 or less

3 (a, b, c, n)*1

Flameproof enclosure
electrical device group

0.4 or less

*1: For explosion-proof class 3, 3a indicates coverage for hydrogen or watergas; 3b indicates hydrogen sulfide; 3c indicates acetylene; and 3n indicatescoverage for all explosion-proof class 3 combustible gas vapor.

Combustible gas vapor ignition point classification
Ignition point

Ignition temperature (°C)

Explosion-proof electrical deviceclassification corresponding to minimum
ignition current*3
Intrinsically safe explosionproof construction
electrical device group

Maximum safe gap(mm)

Minimum ignition
current ratio(methane = 1)

II A

0.9 or higher

II A

Over 0.8

II B

Over 0.5 and lessthan 0.9

II B

0.45 or higher and
0.8 or less

II C

0.5 or less

II C

Less than 0.45

*3: The electrical device group classification consists of II A, II B, and II C, but the classification method
varies depending on the type of explosion-proof construction.

Electrical device permissible
temperature (°C)

Combustible gas vapor classification corresponding to electrical device temperature class

G1

Over 450360

G2Over 300 and 450 or less

240

Electrical device
maximum surface temperature (°C)

Temperature
class

G3

Over 200 and 300 or less160

450 or less

T1

Over 450110

300 or less

T2

Over 300 and 450 or less

200 or less

T3

Over 200 and 300 or less

135 or less

T4

Over 135 and 200 or less

100 or less

T5Over 100 and 135 or less85 or less

T6

Over 85 and 100 or less

G4
G5Over 135 and 200 or lessOver 100 and 135 or less80

Typical ignition points for each explosive gas explosion-proof class from “Constructional
Requirements for Electrical Equipment for Explosive Atmospheres”
Temperature
class

Explosionproof class

1

G1
AcetoneAmmonia
Carbonmonoxide
EthaneAcetateEthyl acetate
ToluenePropaneBenzeneMethanol
MethaneIn addition to the foregoing laws and regulations, there are following relevant laws and regulations:

2
3

Water gas
Hydrogen

G2

G3

G4

G5

Combustible gas vapor
ignition temperature (°C)

Temperature Classes of Representative Explosive Gases under the Recommended
Practices for Explosion-Protected Electrical Installations in General Industries
Temperature
class

T1

T2

T3

T4

II A

AcetoneAmmonia
Isobutane
EthaneAcetateEthyl acetate
TolueneBenzeneMethaneIsopentyl acetate
Acetic anhydride
ButanePropaneMethanol

HexaneAcetoaldehyde

Ethylene
Ethylene oxide

II B

Carbonmonoxide

Ethanol
Ethylene
Ethylene oxide

Acetylene

II C

Water gas
Hydrogen

Acetylene

Explosionproof class

Ethanol
Isopentyl acetate
ButaneGasoline
HexaneAcetoaldehyde

T5

T6

Carbondisulfide

Explosion-proof class example using GX-2012
Explosion-proof class: Ex ia II C T4 X
Ex: Symbol indicating explosion-proof construction in accordancewith the Recommended Practices for Explosion-ProtectedElectrical Installations in General Industries
ia: Intrinsically safe explosion-proof enclosure59

d*2: Indicates explosion-proof construction in accordance with Recommended Practices for Explosion-ProtectedElectrical Installations in General Industries. Ex must be included before the symbol in the explosion-proof class.

Other Relevant Laws and Regulations• Working Environment Measurement Act• Fire Service Act• Ship Safety Act• Act on Maintenance of Sanitation in Buildings (building maintenance act)
• Act on Securing of Safety and Optimization of Transaction of Liquefied Petroleum Gas (liquefied
petroleum gas act)
• Gas Business Act• Act on Hot Springss

Name of explosion-proof construction and corresponding symbol for
explosion-proof electrical devices satisfying certification*2

Intrinsically safe explosion-proof construction

Chapter II General Preventive Measures
Article 3 (working environment measurement, etc.)
For the workplace designated in item 9 of Article 21 of Cabinet Order, the employer shall measure theconcentration of the oxygen in the air before having the workers start the day's work, providing that theconcentrations of both the oxygen and hydrogen sulfide shall be measured for workplaces where class-2
hazardous work of oxygen deficiency is to be carried out.
2. When the employer has made the measurements of the oxygen concentrations in the air provided
for by the preceding paragraph, he shall make a record of the items given below, every time the saidmeasurements have been made, and shall keep the recorded results of the said measurements incustody for a period of three years.
(i) Date and time of the measurements(ii) Method of measurement(iii) Places at which the said measurements were carried out(iv) Conditions of measurements(v) Results of the measurements(vi) Name of the measurer(vii) Outline of the measures taken for prevention of anoxia based on the results of the measurements[Recommended Practices for Explosion-Protected Electrical
Installations in General Industries]

II C: Minimum ignition current ratio (methane = 1) less than 0.45
T4: Combustible gas vapor ignition point exceeds 135 °C and is
200 °C or less
X: Symbol indicating other usage precautions

60

Detection Principle List

Principle and features

Semiconductor
type
SG

Thermalconductivity
type
TEElectrochemical
type
ES

Uses variations in resistance that occur when a metal oxide
semiconductor comes into contact with gas.
• High sensitivity with large sensor output for low concentrations.
• Capable of detecting a wide range of gases, including toxic gases, inaddition to combustible gases.
• Capable of selectively detecting methane or isobutane by suppressing
interference gas sensitivity• Offers high resistance to harsh environmental conditions compared toother types.

Precious metal
wire coil0

Heater coil
Alumina tube

Lead wires

Opticalinterferometric
type
FI

0

Resistance

Detection
target gas

Referenceelectrode
Counter
electrode

Electrolyte

Gas outlet

Active electrodeGas concentration (ppm)

5,000

50

0

100

0
Gas concentration (ppm)

Current

Anode
Electrolyte

philosophy of realizing environments in which people can work with peace of

0.0
Resistance

0100

Infrared0

Infrared sensor

Electrode (-)
A

Cation ⊕Ammeter

Hydrogenflame

Cation ⊖Detection
target gas

Nozzle/electrode (+)

Gas inlet
Main prism

Comparison gas chamber CHA
Measurement gas chamber CHG
Comparison gas chamber CHA

Reflecting prism
Slit
Lens

Slit

Lens

AmplifierPhotoelectric cell

Indicator

80

100

mind. To this end, we promote the following three sustainability activities:• Sustainability to support the industrial infrastructure
0100Concentration (%LEL)

10• Sustainability in development and production of our products

50Hydrogengas

Parallelflat mirror

60

Output ratio (%)

Optical filter

Measuring cell40

i-C 4 H 10

Detection target gas

Infrared light source

20

Oxygen concentration (%)

Output terminals

Gas outlet

As a good corporate citizen, the RIKEN KEIKI Group contributes to asustainable society through businesses based on the theme of our management

Sensor output (mV)Cathode30

90.0

MembraneLight source

61

0

50

Potentiostat circuit

Gas permeable
membrane

Gas outlet

Uses the property of light being refracted by gases.
• Non-reliance on chemical reactions eliminates sensitivity degradationand ensures excellent long-term consistency.
• Capable of accurately measuring various process gas concentrations
continuously• Capable of measuring from 1,000 ppm orders to 100 vol%100

Gas concentration (vol%)Sensor output (nA)

Hydrogen flame
ionization type
FID

Relies on variations in current due to ionization of hydrocarbon gases ina hydrogen flame.
• High sensitivity with rapid response.
• Produces an output virtually proportional to the carbon content ofhydrocarbons, totally eliminating any effects of inorganic carbon
compounds.
• The output exhibits high linearity across the range of measurement
concentrations.

Gas concentration (%LEL)

100

Coil

Sintered body00

Sensor output (mV)Non-dispersive
infrared type
DE

100

100

Metal oxide semiconductor
Metal electrode

Detects gas concentration in the form of a current generated whenoxygen is electrolyzed on electrodes.
• Allows for smaller and lighter products.
• No external power supply is required to operate the sensor.
• The output is proportional to oxygen concentration up to 100 vol%.
• The thermistor mounted inside the sensor performs temperaturecorrection, eliminating virtually all temperature dependence ofreadings.
Relies on the amount of infrared light emitted from a light source within
the sensor and absorbed by the gas.
• Allows accurate and consistent measurements.
• Provides long-term stable measurements with minimal sensitivity
degradation.
• Offers excellent selectivity with minimal interference from coexistinggases or water vapor.
• Unaffected by oxygen concentration, enabling measurement even in
inert gas or N2.

Gas concentration (%LEL)

Output ratio (%)

0

OxygenGalvanic cell
type
OS

0

100
Precious metal
wire coil

Oxidation catalyst +alumina carrier

Relies on the characteristic difference in thermal conductivity for gases
when the gas comes into contact with a heated element.
• The output is virtually proportional (linear) to concentration up to a
100 vol% gas concentration.
• Allows long-term stable use, as the absence of chemical reactions
such as combustion reactions eliminates catalyst degradation andpoisoning.
• Includes a compensating element, virtually eliminating ambientenvironmental effects.
• Capable of detecting high-concentration inert gases such as argon,
nitrogen, and carbon dioxide.
Detects gas concentration in the form of a current generated if the gas
is electrolyzed on electrodes maintained at constant potential.
• Capable of detecting toxic gas with high sensitivity (e.g. arsine at 0 0.2 ppm).
• Capable of selectively detecting the target gas by selecting thepotential setting.
• Produces a linear output, allowing accurate measurement of lowconcentration gases.

Output ratio (%)

100
Oxidation catalyst +alumina carrier

Output ratio (%)

New
ceramic type
NC

Uses the heat produced when combustible gas is combusted on an
ultrafine particle (new ceramic) oxidation catalyst developed by Riken
Keiki.
• Enables measurement of a wide range of concentrations from ppm to%LEL orders using a single sensor.
• Virtually unaffected by ambient temperature and humidity.
• Outstanding poisoning resistance compared to previous catalytic
combustion type sensors, suffers minimal sensitivity deterioration, andoffers long-term stability.

Output characteristics

Sensor output (mV)

Catalytic
combustion
type
HW

Uses the heat produced (variation in resistance of precious metal wirecoil) when combustible gas is combusted on an oxidation catalyst.
• The output from the sensor is virtually proportional (linear) to the gas
concentration up to the lower explosive limit.
• Virtually unaffected by ambient temperature and humidity.
• Rapid response, excellent response characteristics, excellent
accuracy, and repeatability

Construction

Sensor output (µA)

Individual principle features and construction

50
100
Gas concentration (ppm)

50
40
30
20

Interference fringe
concentration• Sustainability as a good corporate citizen

Interference
fringedisplacement

10
0

1
2
3
4
Gas concentration (%)

5Overseas Sales Bases
RegionSales agent and subsidiary locations

North America

USA

South America

Brazil, Argentina, Peru, Chile, Uruguay

Asia Pacific《28 overseas
locations》

China, Korea, Taiwan, Singapore, Malaysia, Indonesia, Thailand, India, Vietnam,
Philippines, Australia

EuropeGermany, Greece, Netherlands, Norway, Poland, Turkey, UK

Middle East

UAE, Israel

AfricaSouth Africa

Subsidiary

RussiaRussian Federation

Sales agent

Full Support System
Riken Keiki continually strives to expedite and improve its emergency response and periodic maintenance.
Our comprehensive after-sales service system is supported by a team of specialist engineers.
Across Japan, our extensive servicing network comprises 18 sales offices and 33 service stations. As a manufacturer of industrial
disaster prevention devices, we provide customers with year-round access to specialist service engineers for consultations on our
products or after-sales services.
RegionSales offices

Service station locations《51 locations
across Japan》

Hokkaido

SapporoSapporoTohokuIwate, Sendai(Iwate), Sendai, Tsuruoka

Sales baseKanto/Shinetsu

Mito, Saitama, Chiba,
Kanagawa

Ibaraki, (Mito), Tsukuba, Kashima, (Saitama), (Chiba),
Tokyo, Yokohama, Atsugi, Niigata, Matsumoto, Kofu

Manufacturing baseTokai/Hokuriku/Kinki

Hamamatsu, Nagoya,Yokkaichi, Kanazawa, Osaka,
Kobe(Hamamatsu), (Nagoya), (Yokkaichi Higashi),(Yokkaichi), Toyama, (Kanazawa), Keiji, Amagasaki,
Himeji

Chugoku/Shikoku

Mizushima, Hiroshima(Mizushima), Shikoku, Higashi-Hiroshima, Hiroshima,
Tokuyama

Kyushu/Okinawa

Fukuoka, Kumamoto, Oita

Tosu, Kumamoto, (Oita)

Maintenance baseRiken Keiki
head office

Locations in parentheses are service stations attached to sales offices.

Head officeWeb

2-7-6, Azusawa, Itabashi-ku, TOKYO, JAPAN 174-8744
TEL ＋81-3-3966-1113 FAX ＋81-3-3558-9110
https://www.rikenkeiki.co.jp/english• North America 	����������� United States• South America	����������� Brazil, Argentina, Peru, Chile, Uruguay• Asia-Pacific	���������������� China, South Korea, Taiwan, Singapore, Malaysia,
Indonesia, Thailand, India, Vietnam, Philippines,
Australia• Europe 	���������������������� Germany, Greece, Netherlands, Norway, Poland,
Turkey, United Kingdom• The Middle East 	�������� United Arab Emirates, Israel• Africa 	������������������������ South Africa• Russia	������������������������ Russian Federation* The information provided in thiscatalog is subject to change
without notice due to productimprovements.

PC9E-0341-230310 T