PC0E-1003

Specifications
ModelGX-3R

Detection method

Diffusion type (Changeable to sampling type by attaching RP-3R)

Gas alarm indication

Lamp flashing, continuous modulating buzzer sounding, gas concentration display blinking, vibration
Reset operation: Self-latching

Fault alarm

System abnormality, sensor abnormality, battery voltage drop, calibration failure

Fault alarm indication

Lamp flashing, intermittent buzzer sounding, detail display Reset operation: Self-latching

Displays

LCD digital, backlight, operation status, clock, battery level, temperature, peak reading, calibration notification

Buzzer volume

Approx. 95dB (30cm)

Data logger function

Maximum number of items: 3,600
ATEX

Interval: 5 minutes (adjustable) Communication system: IrDA

IECEx

Protection level

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

Lithium ion rechargeable battery unit

Continuous operating time*1

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)Temperature range/humidity range*2-40℃〜+60℃(no sudden changes), 0〜95%RH (non-condensation)

External dimensions/weight

Approx. 58mm (W) × 65mm (H) × 26mm (D) (excluding protrusions) / Approx.100g

Warranty

3 years (optional 2 years extension available)

Small & Light

Charging time: Approx. 3 hours

The newly developed dual-sensor
configuration reduces size byapproximately 30% compared toprevious models.
Light weight (about 100g) means
it won’t interfere with your work.

*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 forcontinuous ambient conditions are as follows: Temperature: -20 °C to +50 °C (no sudden changes) / Humidity: 10 to 90 %RH (no condensation)

Detection gas

5-year warranty

Detection target gas

Combustible gas(HC or CH4)

Detection principle

New ceramic type

Detection range(service range)

0~100%LEL

0~25.0 vol%(~40.0 vol%)0~500ppm(~2000ppm)

0~100.0ppm(~200.0ppm)

1 digit

1%LEL

0.1vol%1ppm

0.1ppmGas alarm setpoint(can be set by user)

1st alarm: 10%LEL
2nd alarm : 25%LEL
3rd alarm : 50%LEL
OVER alarm : 100%LEL

L alarm: 19.5vol%
LL alarm: 18.0vol%H alarm: 23.5vol%
OVER alarm : 40.0vol%

1st alarm:25ppm
2nd alarm :50ppm
3rd alarm : 1200ppm
TWA alarm :25ppm
STEL alarm : 200ppm
OVER alarm : 2000ppm

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

Oxygen(O 2)

Carbon monoxide(CO)Hydrogen sulfide(H 2S)*Option.

Type list

Protective coverAC adapter(Part No. 2594 0898 30)

Alligator clip
(Part No. 4777 9203 10)

Calibration adapter (simple type)(Part No. 4777 9307 40)

TYPE

Detection gas

TYPE A

LEL, O2, H2S, CO

TYPE B

LEL, O2 ,H2S

TYPE C

LEL, O2, CO

TYPE CH

LEL, O2, CO*

TYPE D

LEL, O2TYPE E

O2, H2S

TYPE F

O2, COTYPE FH

O2, CO*TYPE I

LEL, COTYPE IH

LEL, CO*TYPE K

H 2S* CO sensor with reduced H2 interference

Protective cover(Part No. 4777 4161 10)

The instrument and sensors have
5-year warranty*.

Electrochemical type

Standard accessories

Appearance when
attached

Hand strap(Part No. 0888 0605 90)

EU plug(Part No. 2594 0933 60)

Intrinsically safe explosion-proof
construction andflame - proof enclosures
Water and dust resistant
IP66/68

Distributed by:

Robust design(Withstands 7m drop)

2 -7-6 Azusawa, Itabashi-ku, Tokyo 174 - 8744, Japan

Phone : +81-3-3966-1113
Telefax : +81-3-3558-9110
E-mail : intdept@rikenkeiki.co.jp
Web site : http://www.rikenkeiki.co.jp/english

Play the Promotional videofrom here.

※ The contents described in this catalog are

subject to change without notice according
to the performance improvement.

Portable gas monitor

II1G Ex da ia IIC T4 Ga / IM1 Ex da ia I Ma (With combustible gas sensor)
II1G Ex ia IIC T4 Ga / IM1 Ex ia I Ma (No combustible gas sensor)
Ex da ia IIC T4 Ga / Ex da ia I Ma (With combustible gas sensor)
Ex ia IIC T4 Ga / Ex ia I Ma (No combustible gas sensor)
Ex ia IIC T4 Ga

Explosion-proof class

Japan ExModel

Now on the website!
PC0E-1001-200130 SWeights
just100g!A c t i v e i n var i o us fie l d s!

Optional accessories
1 Heat-resistantcase

2 Leather caseModel

3 Belt clip

*not explosion-proof

4 Arm/Ankle belt

Construction sites

Gas plants

Shipyards

Steel plants

Compact lightweight design won’t
impede work in confined spaces.

Tough design to withstand 7m drop,that you can use even when working at heights.

Use the suction unit to confirm
safety before entering pits.

The newly developed CO
sensor reduces
effects of hydrogen interference.

You can understand at a glance! GX-3R
ModelGX-3RDetection gas

1 to 4 types

Battery

5 Protective film

Samplingprobe*Photo shows the unit withsampling probe.

7 Charging cradle

8 Five-unit
AC adaptor

Conversion gas

Rechargeable batteryMethane

CH4ー×Benzene

C6H6◯

◯

Detection method

Diffusion type
*Pump unit available as option (see next page)

Isobutane

i-C4H10◯ーn-Hexane

n-C6H14◯◯

Hydrogen

H2◯◯

Toluene

C7H8◯◯

Alarm setpoint

Settings can be changed.

Methanol

CH3OH◯n-Heptane

n-C7H16◯◯

Combustible gas conversion function

27 types◯

Acetylene

C2H2◯◯Xylene

C8H10◯◯

Data logger function

Records up to 3,600 data.

Ethylene

C2H4◯◯n-Nonane

n-C9H20◯◯

Confirmation beep function

Can be changed (see section below for details).

EthaneC2H6◯

×Ethyl acetate

EtAc

◯

◯

Lunch break function

Can be changed (see section below for details).

Ethanol

C2H5OH◯◯

Isopropyl alcohol

IPA◯

◯

Protective cover

Provided as standard

Propylene

C3H6◯

◯

Methyl ethyl ketone

MEK◯

◯

Heat-resistant case, leather case

Optional accessories

Acetone

C3H6O

◯

◯

Methyl methacrylateMMA◯◯

Five-component detection⇒ We recommend the GX-3R Pro model.

PropaneC3H8◯

×Dimethyl ether

DME◯

◯

Dry battery power⇒ We recommend the GX-3R Pro model.

Butadiene

C4H6◯

◯

Methyl isobutyl ketone

MIBK

◯

◯

Bluetooth⇒ We recommend the GX-3R Pro model.

Cyclopentane

C5H10

◯

◯

Tetrahydrofuran

THF

◯

◯

n-Pentane

n-C5H12◯◯

Conversion gas

Gas name Calibration gas conversion
displayed
CH4
i-C4H10

Case for protection from heat resource.
Uses a safety pin.

Part No. 4777 4259 402LeathercaseCase for protection against dirt.
Uses the clip on the unit.

Part No. 4777 4257 00

Belt clip

Allows the product to be attached toa belt or pocket.

Part No. 4777 9202 40

4Arm/Ankle
belt

Belt for securing the unit to your arm orankle.

Part No. 4777 9293 30

5Protective
film

Protects the display.
(set of 5)

Part No. 4777 9296 50

6Manualsuction unit

External manual pump.
Draws in at greater flow rates than electric
pump.

7Charging
cradleCradle for recharging the unit.
Cradles can be interconnected.

8Five-unit
AC adaptorOne AC adapter recharges up to five units.
*Recharging times remain unchanged.

9Calibration
adapter

Adapter for applying gas to GX-3R during
bump test and calibration.
(with outlet nipple and rubber seal)

10

Data
management
program

Software for viewing and managing
measurement data.

3

10 Data management
program

1112

Pump unit RP-3R

An external electric pump.
Allows use forsuction sampling.

Mounted with the new R sensors, which are long-term consistence sensors
GX-3R mounted with the new R sensor series, which have dramatically improved the performance from the previous sensors.
The sensors have 5-year warranty*.

Specifications
ModelRP-3R

Suction flow rate

High mode: 0.4 L/min or more
Low mode: 0.25 L/min or more

Battery

AA alkaline battery × 1

Continuous
operating timeHigh mode: Approx. 10 hours
Low mode: Approx. 16 hours(with sampling probe)
Part No. 4777 9302 80(with 8m float-type tube)
Part No. 4777 9304 20(with 30m weighted tube)
Part No. 4777 9305 00
Part No. BC-3R 00(with 22.5cm cable)
Part No. 4777 9329 70(with 60cm cable)
Part No. 4777 9319 80(with 120cm cable)
Part No. 4777 9333 20
Part No. 4777 9311 00

Part No. 9811 0870 60

Docking station SDM-3R

Allows the user to performa simplified pre-work check(bump test) andgas calibration automatically.

Temperature range -20ºC~+50ºC (at a constant condition)*Option.

Tough construction against
poisoning- and impact-resistant!

Heat-resistantcase

9 Calibration
adapter

Combustible conversion gas list
Gas name Calibration gas conversion
displayed
CH4
i-C4H10

HC or CH4

6 Manual suction
unit

1O2

CO&H2SCONew electrochemical oxygen sensor,
which improved the basiccharacteristics.

2-in-1 configuration enabled smaller
detector!

Significantly reduce H2 interferencewith a two-sensor structure!

Humidity range
Explosion-proof
class

0~95%RH (non-condensing)Inherently safe explosion-proof construction
ATEX
II1G Ex ia IIC T4 Ga
IECEx

Ex ia IIC T4 Ga

Japan Ex Ex ia IIC T4 Ga

Easy to attachand remove!

Structure

Drip-proof and dust-proof performancescompliant to IP67 level

Dimensions /WeightApprox. 82mm (W) × 96mm (H) × 29mm (D) /Approx. 120g

Optional accessories

8m float-type gas sampling tubeFilters (set of 10)
Meshes (set of 10)

Specifications
ModelSDM-3R

Power supply

100 to 240 V AC ±10%, 50/60 Hz

Suction flow rate

Approx. 0.25 L/min

Temperature range 0~40ºC (at a constant condition)
Humidity range

0~95%RH (non-condensing)

Dimensions /WeightApprox. 130mm (W) × 110mm (H) × 250mm (D) /Approx. 800g

Optional accessories

Connecting fixture, wall-mounting fixture,exhaust tube

* Cannot be connected to other models GX-2009, GX-3R Proand others.

Wide range of safety functions
Combustible gas
conversion function
Eliminates the need for complex calculations.
Allows direct readout of 27 different combustible
gas types.

Lunch break
Enabling this function retains the TWA
and peak values and allows integrating
measurement whether power is on or off.

Alarm setpoints can be
freely adjusted
You can now adjust alarm setpoints on
the main unit. Allows monitoring basedon the customer’s own standards.

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

Confirmation beepThis function provides audible notification thatthe device is functioning correctly.
Buzzer sounds at preset intervals whilemeasurement is underway.

Also consider the high-spec [GX-3R Pro] model!
① Up to 5 gases can be detected

Detects carbon dioxide and sulfur dioxide in addition to combustible gases, O2, H2S, and CO.

② Connects with Bluetooth

Allows connection to a smartphone.
Use the dedicated app iOS, Android to send alarm notifications by email.

③ Runs on either dry cell or rechargeable batteries
Unit system for easy replacement.

④ Easy-to-read full-dot display
Supports a total of 11 different languages.

Model* For details, see the GX-3R Pro catalog.

A c t i v e i n var i o us fie l d s!

Optional accessories
1 Heat-resistantcase

2 Leather case*not explosion-proof

4 Arm/Ankle belt

Construction sites

Gas plants

Shipyards

Steel plants

Compact lightweight design won’t
impede work in confined spaces.

Tough design to withstand 7m drop,that you can use even when working at heights.

Use the suction unit to confirm
safety before entering pits.

The newly developed CO
sensor reduces
effects of hydrogen interference.

You can understand at a glance! GX-3R
ModelGX-3R

Detection gas

1 to 4 types

Battery

5 Protective film

6 Manual suctionunit

Samplingprobe*Photo shows the unit withsampling probe.

7 Charging cradle

8 Five-unit
AC adapter

Conversion gas

Rechargeable battery

MethaneCH4ー×Benzene

C6H6◯

◯

Detection method

Diffusion type
*Pump unit available as option (see next page)

Isobutane

i-C4H10◯ーN-hexane

n-C6H14◯◯

HydrogenH2◯◯Toluene

C7H8◯◯

Alarm setpointSettings can be changed.

Methanol

CH3OH

◯

◯

N-heptane

n-C7H16◯◯

Combustible gas conversion function

26 typesAcetylene

C2H2◯

◯

XyleneC8H10◯◯

Data logger function

Records up to 3,600 data.

Ethylene

C2H4◯◯

N-nonane

n-C9H20◯◯

Confirmation beep function

Can be changed (see section below for details).

EthaneC2H6◯

×Ethyl acetate

EtAc

◯

◯

Lunch break function

Can be changed (see section below for details).

Ethanol

C2H5OH◯◯

Isopropyl alcohol

IPA◯

◯

Protective cover

Provided as standardPropyleneC3H6◯◯

Methyl ethyl ketone

MEK◯

◯

Heat-resistant case, leather case

Optional accessoriesAcetone

C3H6O

◯

◯

Methyl methacrylateMMA◯◯

Five-component detection⇒ We recommend the GX-3R Pro model.

PropaneC3H8◯

×Dimethyl ether

DME◯

◯

Dry battery power⇒ We recommend the GX-3R Pro model.

Butadiene

C4H6◯

◯

Methyl isobutyl ketone

MIBK◯

◯

Bluetooth⇒ We recommend the GX-3R Pro model.

Cyclopentane

C5H10◯◯

Tetrahydrofuran

THF◯

◯

Conversion gas

1Heat-resistantcase

Case for protection from heat resource.
Uses a safety pin.

Part No. 4777 4576 102Leathercase

Case for protection against dirt.
Uses the clip on the unit.

Part No. 4777 4551 70

Belt clip

Allows the product to be attached toa belt or pocket.

Part No. 4777 9202 40

4Arm/Ankle
belt

Belt for securing the unit to your arm or
ankle.

Part No. 4777 9293 30

5Protectivefilm

Protects the display.
(set of 5)

Part No. 4777 9296 50

6Manualsuction unit

External manual pump.
Draws in at greater flow rates than electricpump.

7Charging
cradleCradle for recharging the unit.
Cradles can be interconnected.

8Five-unit
AC adapter

One AC adapter recharges up to five units.
*Recharging times remain unchanged.

9Calibration
adapter

Adapter for applying gas to GX-3R during
bump test and calibration.
(with outlet nipple and rubber seal)

10

Data
management
program

Software for viewing and managing
measurement data.

3

9 Calibration
adapter

Combustible conversion gas list
Gas name Calibration gas conversion
displayed
CH4
i-C4H10Model

3 Belt clip

Gas name Calibration gas conversion
displayed
CH4i-C4H10
10 Data management
program

11Pump unit RP-3R (S)An external electric pump. Allows use for suction sampling.

Specifications

12(with sampling probe)
Part No. 4777 9302 80(with 8m float-type tube)
Part No. 4777 9304 20(with 30m weighted tube)
Part No. 4777 9305 00
Part No. BC-3R 00(with 22.5cm cable)
Part No. 4777 9329 70(with 60cm cable)
Part No. 4777 9319 80(with 120cm cable)
Part No. 4777 9333 20
Part No. 4777 9311 00

Part No. 9811 0870 60

Docking station SDM-3R

Allows the user to performa simplified pre-work check(bump test) andgas calibration automatically.

Mounted with the new R sensors, which are long-term consistence sensors
GX-3R mounted with the new R sensor series, which have dramatically improved the performance from the previous sensors.
The sensors have 5-year warranty*.
*Option.

HC or CH4
Tough construction against
poisoning- and impact-resistant!

O2

CO&H2SCONew electrochemical oxygen sensor,
which improved the basic
characteristics.

2-in-1 configuration enabled smaller
detector!

Significantly reduce H2 interferencewith a two-sensor structure!

Specifications
ModelSDM-3R

Power supply

100 ~ 240 V AC ±10 %, 50/60 Hz

Suction flow rate

Approx. 0.25 L/min

Temperature range 0~40 ºC (at a constant condition)

Eliminates the need for complex calculations.
Allows direct readout of 26 different combustible
gas types.

Lunch break
Enabling this function retains the TWA
and peak values and allows integrating
measurement whether power is on or off.

Alarm setpoints can be
freely adjusted
You can now adjust alarm setpoints on
the main unit. Allows monitoring basedon the customer’s own standards.

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

0~95 %RH (non-condensing)
Approx. 130 mm (W) × 110 mm (H) × 250 mm (D) /Approx. 800 g

Optional accessories

Connecting fixture, wall-mounting fixture,exhaust tube

* Cannot be connected to other models GX-2009, GX-3R Pro
and others.

Wide range of safety functions
Combustible gas
conversion function

Humidity range
Dimensions /WeightConfirmation beepThis function provides audible notification thatthe device is functioning correctly.
Buzzer sounds at preset intervals whilemeasurement is underway.

Also consider the high-spec [GX-3R Pro] model!
① Up to 5 gases can be detected

Detects carbon dioxide and sulfur dioxide in addition to combustible gases, O2, H2S, and CO.

② Connects with Bluetooth®

Allows connection to a smartphone.
Use the dedicated app iOS, Android to send alarm notifications by email.

③ Runs on either dry cell or rechargeable batteries
Unit system for easy replacement.

④ Easy-to-read full-dot display
Supports a total of 11 different languages.

Bluetooth are registered trademarks of Bluetooth SIG, Inc. and used by RIKEN KEIKI under license.

Model* For details, see the GX-3R Pro catalog.

PC0E-1001

Specifications

Model

Small & LightThe newly developed dual-sensor
configuration reduces size byapproximately 30% compared toprevious models.
Light weight (about 100g) means
it won’t interfere with your work.

5-year warranty
Detection gas
Detection target gas

Combustible gas(HC or CH4)

Detection principle

New ceramic type

Detection range(service range)
1 digitGas alarm setpoint(can be set by user)

Oxygen(O 2)

Carbon monoxide(CO)Hydrogen sulfide(H 2S)*Option.

Electrochemical type0~100%LEL

0~25.0 vol%(~40.0 vol%)0~500ppm(~2000ppm)

0~100.0ppm(~200.0ppm)

1%LEL

0.1vol%1ppm

0.1ppm

1st alarm: 10%LEL
2nd alarm : 25%LEL
3rd alarm : 50%LEL
OVER alarm : 100%LEL

L alarm: 19.5vol%
LL alarm: 18.0vol%H alarm: 23.5vol%
OVER alarm : 40.0vol%

1st alarm:25ppm
2nd alarm :50ppm
3rd alarm : 1200ppm
TWA alarm :25ppm
STEL alarm : 200ppm
OVER alarm : 2000ppm1st alarm: 5.0ppm
2nd alarm : 30.0ppm
3rd alarm : 100.0ppm
TWA alarm : 1.0ppm
STEL alarm : 5.0ppm
OVER alarm : 200.0ppm

Standard accessories

Type list

Protective cover

AC adapter(Part No. 2594 0898 30)

Alligator clip
(Part No. 4777 9203 10)

Appearance when
attached

Calibration adapter (simple type)(Part No. 4777 9369 30)

TYPE

Detection gas

TYPE A

LEL, O2, H2S, CO

TYPE B

LEL, O2 ,H2S

TYPE C

LEL, O2, CO

TYPE CH

LEL, O2, CO*

TYPE D

LEL, O2TYPE E

O2, H2S

TYPE FO2, COTYPE FH

O2, CO*TYPE I

LEL, COTYPE IH

LEL, CO*TYPE K

H 2S* CO sensor with reduced H2 interference

Protective cover(Part No. 4777 4161 10)

The instrument and sensors have
5-year warranty*.

Hand strap(Part No. 0888 0605 90)

Intrinsically safe explosion-proof
construction andflame - proof enclosures
Water and dust resistant
IP66/68

EU plug(Part No. 2594 0933 60)

Distributed by:

Robust design(Withstands 7m drop)

2 -7-6 Azusawa, Itabashi-ku, Tokyo 174 - 8744, Japan

Phone : +81-3-3966-1113Telefax : +81-3-3558-9110
E-mail : intdept@rikenkeiki.co.jp
Web site : https://www.rikenkeiki.co.jp/english

Play the Promotional videofrom here.

※ The contents described in this catalog are

subject to change without notice according
to the performance improvement.

Now on the website!
PC0E-1003-240200 S

Portable gas monitor

Weights
just100g!