PRODUCTS GUIDEPORTABLE GAS MONITORSMULTI-GAS MONITORSFLUE GAS TESTERSFIXED TYPE GAS ALARM SYSTEMVAVLE SHUTTING DEVICEODOR MONITORSKOMYO RIKAGAKU KOGYO K.K.

Our continuous efforts in manufacturing anddevelopment products to prevent industrial accidents
and support safe and healthy work environment
strive for the people to live safely in
comfortable living environment.

KITAGAWA VISION
Through continuous development and commercialization of the FAST, EASY and ACCURATE detection ofchemical substances, KITAGAWA shall contribute to protect the environment and prevent disasters.
Putting the future in the field of vision precisely, KITAGAWA endeavors to establish its original technologies
and strengthens management bases.

KITAGAWA MISSIONKITAGAWA provides the world's marketplaces with trusted products at reasonable prices.
KITAGAWA's goal is to maximize the benefits to the public, the customer, the employee and the shareholder.

QUALITY POLICYKITAGAWA strives to make the product deserve a global standard for quality and achieves customer satisfaction
throughout the world.

ENVIRONMENTAL POLICYKITAGAWA designs and develops advanced products for the protection of human life and the environment.
① Vigilantly assesse the environmental impact of its activities and strive for the prevention of environmental pollution.
② Fully respect the regulations and organizational standards on environmental conservation.
③ Make every effort to control and reduce the waste.
④ Employs advanced measures to save energy and resources.
⑤ Embraces the development of eco-friendly products.

CONTENTS
Portable Gas Monitors
Combustible Gas Monitors

4

Combustible Gas Monitors（for explosion prevention・leak detection)
Hydrogen Monitor（for explosion prevention)

Oxygen Monitors（for oxygen deficiency prevention)

5

Carbon monoxide Monitors（for toxic prevention)

6

Hydrogen Sulphide Monitor（for toxic prevention)

7

Sulpher Dioxide Monitor（for toxic prevention)

7

Multi-Gas Monitors

8

Oxygen・Combustible Gas Monitor（for oxygen deficiency・explosion prevention)
Oxygen・Hydrogen Monitor（for residual oxygen・explosion prevention)
Multi-Gas Monitors
Oxygen/Combustible gas/Hydrogen sulphide/Carbon monoxide
Oxygen・Carbon Monoxide Monitors（for oxygen deficiency・toxic prevention)
Oxygen・Hydrogen Sulphide Monitors（for oxygen deficiency・toxic prevention)

Flue Gas Testers
Carbon Monoxide・Oxygen・Oxygen/Carbon Monoxide Monitors

9
10
11
12

Fixed Type Gas Detector Alarm System
Combustible Gas Alarm Meters and Detectors

14

Oxygen Alarm Meter and Detectors（ for oxygen deficiency prevention )16

Toxic Gas Alarm Meter and Detectors（for toxic prevention, leak detection)

17（for explosion prevention, leak detection, continuous exposure)

Carbon monoxide・Hydrogen sulphide・Ammonia

Gas Alarm Meters-Multiple Sampling Points（for toxic prevention)

18
19

Optional Parts For Fixed Type Gas Detectors

20

Combination of Combustible gas・Oxygen・Toxic gases（1 ～ 8 sampling points）
Combustible gas（1 ～ 6 sampling points）
Drip-proof covers・detector boxes・air filters・drain traps・gas collector

Application SpecificGas Sensors

21

Application Specific Instruments

22

Indoor Environment Monitor
CO/CO2 Monitor, Residual Oxygen Meter
Emergency Shut-Off System For High-pressure Gas Cylinder Valve
Portable Odor Monitors

23
24

References
Detection Principle

26

Explosion-proof Apparatus

27

Combustible Gas Monitors

For explosion prevention by detecting combustible gases in the air or by leakCombustible Gas Monitors
Wearable/Diffusion Type
Downward sensor impervious to waterdrop and dust particles
Compact light size to fit to a belt or pocket for hands-free work

Portable/Suction Type
Delivers loud sound alarm
Fast response timeFor explosion prevention

FM-620E Calibrated as iso-Butane＜FPA-5000E＞

Explosion-Proof
approved
Intrinsic safety

For explosion prevention

LEL
FPA-5000E ％Calibrated
as iso-Butane

For explosion prevention

FM-621E Calibrated as Methane(FPA-5000EM, Methane calibrated is available)
Explosion-Proof
approved
Intrinsic safety

Explosion-Proof
approved
Intrinsic safety

For leak detection

FPA-5200E

ppm
Calibrated as iso-Butane
High sensitivity

Explosion-Proof
approved
Intrinsic safety

For explosion prevention

FM-619E For Hydrogen＜FM-620E＞

Capable to detect Hydrogen in inert gas
Explosion-Proof
approved
Intrinsic safety

Leather case for
FM, OM-600 series
Gas sampling tubes andhoses are different
depending on the models.

Model
Measuring gas
Detection principle
Sensor model used
Sampling method
Measuring range
Resolution
Indication accuracy＊1

Sensor for Hydrgen detection receives
less interferences from other combustible gases

Carrying case for
FM, OMA, OM-600
series

FPA-5000E

FPA-5200E
FM-620E
FM-621E
FM-619E
Combustible gas in the air
Combustible gas in the air
Hydrogen
Catalytic combustion
Heat wire semiconductor
Catalytic combustion
Chronoamperometry
FC-8P
SC-311P
FC-8P
KTS-526
Suction type (approx. 0.6L/min with a gas sampling tube with 2.4m sampling probe)
Diffusion type0 ～ 100%LEL(※ )0 ～ 200×10ppm
0 ～ 100%LEL(※ )1%LEL
1×10ppm
1%LEL±10%LEL―±10%LEL
Alarm setting value at 500ppm; ±50ppm±25% of the alarm setting value or±10%LEL
Alarm accuracy±10%LEL, whichever is greater (Recommend to set alarm setting value over 500ppm)
ALM1:20%LEL, ALM2:0%LEL (configurable)
Alarm setting value AL1:20%LEL, AL2:0%LEL (configurable) AL1:50×10ppm, AL2:0×10ppm (configurable)
Within 25 seconds with gas
Within 25 seconds at 90% response from sampling gas inlet at 20℃
Response time
Within 25 seconds at 90% response
concentration 1.6xalarm setting value
Alarm method
LCD, LED lamp and buzzer
LCD, LED lamp and buzzer
ExiaⅡ CT4X No.TC19531
Explosion-proof
ExiadⅡ CT4X No.TC17118
ExiadⅡ CT4X No.TC19587-10 ～ 40℃ 30 ～ 85%RH-10 ～ 40℃ below 95%RH-10 ～ 40℃ below 95%RH-10 ～ 40℃ 30 ～ 85%RH
Temperature·humidity(non-condensing)(non-condensing)
Pressure range―
80 ～ 110kPa
Power supply
3 x AAA size alkaline battery (LR03)
3 × AA size alkaline battery (LR6)Approx. 16 hours
Approx. 8 hours
Approx. 20 hours
Run time＊2
Size·weight
105 (W) ×56 (H) ×29 (D) mm approx.170g (including batteries)
78(W)×200(H)×50(D)mm approx.550g (including batteries)
Standard accessory
Softcase with a clip
Gas sampling tube with sampling probe (2.4m), leather case, carrying caseGas sampling hose with ﬂoat type gas collector (5m·10m·20m·30m, polyurethane)
Option―※ %LEL ＝ Concentration of Combustible gases (vol%) ÷ Lower Explosive Limit(vol%) × 100＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

4Detect oxygen concentration and notify workers of oxygen deficiency danger before entering to irrespirable
atmospheres or oxygen-deficient confined space such as tunnel, manhole or public utility conduit.

Oxygen Monitors

Oxygen Monitors
Wearable/Diffusion Type
Downward sensor impervious towaterdrop and dust particles
Compact light size to fit to a belt or
pocket for hands-free work
For oxygen deficiency prevention

OPA-5000E

Capable of remote detection
with an optional adaptor anda sensor cord

Explosion-Proof
approved
Intrinsic safety

Portable/Diffusion Type
Delivers loud sound alarm
Bright LED lamp
For oxygen deficiency prevention

OMA-600E
Explosion-Proof
approved
Intrinsic safety

Marks in white on every 1 metre on the sensor cord
are indication for distance at remote measurement.

Portable/Suction Type
Delivers loud sound alarm
Fast response time
For oxygen deficiency prevention

OM-600E
Explosion-Proof
approved
Intrinsic safety

Model
Detection principle
Sensor model used

OPA-5000E

Sampling method
Measuring range(resolution)
Indication accuracy＊1
Alarm accuracy
Alarm setting value

OMA-600E
Galvanic cell
OC-6B
Diffusion type

Factory default setting

AL1:18.0vol%Response time
Alarm method
Explosion-proof
Temperature·humidity
Pressure range
Power supply
Run time＊2
Size·weightStandard accessory
OptionExiaⅡ CT4X

No.TC16908

3× AAA size alkaline battery (LR03)
Approx. 1000 hours
105(W)×56(H)×29(D)mmapprox.150g (including batteries)
Softcase with a clip
Sensor extension code (5m·10m·20m·30m),
adaptor for extension hose

OM-600E

Suction type(approx. 0.6L/min with 5m gas sampling hose)

0.0 ～ 50.0vol% (0.1vol%)0~25.0vol%:±0.5vol% 25.1~50.0vol%:±3.0vol%±0.5vol% against alarm setting value 18.0vol%
Factory default setting
Within 15 seconds at 90% response (at 20℃ )ALM1:18.0vol%from sampling gas inlet
LCD, LED lamp and buzzer
ExiaⅡ CT4X No.TC20164
ExiaⅡ CT4X No.TC19531-10 ～ 40℃ 30 ～ 85%RH (non-condensing)80 ～ 110kPa
3× AA size alkaline battery (LR6)Approx. 2500 hours
Approx. 16 hours
78(W)×200(H)×50(D)mm
160(W)×178(H)×65(D)mmapprox.740g (including batteries and sensor cord)
approx.550g (including batteries)
Gas sampling hose with ﬂoat type gas collector
5m sensor cord, carrying case
(5m, polyurethane), leather case, carrying caseGas sampling hose with ﬂoat type gas collector
Sensor cord (10m·20m·30m)(10m·20m·30m, polyurethane)＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

5Detect carbon monoxide produced by the incomplete combustion in steel mills,
reﬁneries, utilities and generators installed in culvert, send alarms and notify danger.

Carbon Monoxide Monitors

Carbon Monoxide Monitors

Wearable/Diffusion Type
Downward sensor impervious to waterdrop
and dust particles
Compact light size to ﬁt to a belt or pocket
for hands-free work

For toxic prevention

TPA-5000P
Attachable to helmet/Diﬀusion Type
Alerts danger to workers around

For toxic prevention

TPA-8000

Gas detection
port

TPA-5000 series monitors are capable of remotedetection with an optional sensor cord

Attach tohelmetCapable of alerting danger
by ﬂashing LED, vibrations andsounding buzzer near eyes and ears.
Model
Measuring gas
Detection principle
Sensor model used
Sampling method
Measuring range
Resolution

TPA-8000
Carbon monoxide
ChronoamperometryKCS-7S
Diffusion type0 ～ 999ppm◎
1ppm◎

TPA-5000P
Carbon monoxide
ChronoamperometryKCS-5P
Diffusion type0 ～ 500ppm
1ppm

Indication accuracy＊1―

0~100ppm:±10ppm, above 101ppm:±10% of indicated value

Alarm accuracy±15 ppm or ±15% of the alarm setting, whichever is greater±15 ppm or ±30% of the alarm setting, whichever is greater

Alarm setting value

Alarm1:50ppm Alarm2:80ppm Alarm3:120ppm
Alarm4:150ppm Total alarms : 150ppm (configurable)

Response time
Alarm method
Temperature·humidity
Power supply
Run time＊2
Size·weightStandard accessory
OptionWithin 30 seconds at 90% response
Alarms 1 to 3: ﬂashing red LED and sounding buzzer
Alarm 4: ﬂashing red LED, sounding buzzer, and vibrations
Total alarm: ﬂashing yellow LED and sounding buzzer-10 ～ 50℃ 15 ～ 90%RH (non-condensing)
Lithium-ion polymer rechargeable battery
Approx. 3000 hours
122 (W) ×13 (H) ×40 (D) mm approx. 50g
AC adapter for recharge
GR-8000 display

Calculated concentration levels, e.g., used to obtain cumulative levels. When the optional GR-8000 display is connected,
the readings of cumulative levels will be displayed as a rangeof values up to 999 ppm.
＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

6

AL1:50ppm

AL2:100ppm (configurable)

Within 25 seconds at 90% response
LED lamp · LCD · buzzer · vibration-10 ～ 40℃ 30 ～ 85%RH (non-condensing)2 x AAA size alkaline battery
Approx. 600 hours
100 (W) ×54 (H) ×23 (D) mm approx.100g (including batteries)
Softcase with a clip
Sensor cord with adaptor (5m·10m·20m·30m)

Detects hydrogen sulphide from sapropel or decay of organic matter produced at sewer,
human-waste treatment plant, pulp mill or waste disposal centres, or hydrogen sulphideproduced at volcanos and spas, sends alarms and notiﬁes danger.

Hydrogen Sulphide Monitor

Detects sulphur dioxide generated from fumigant, pesticide, bleach for timber,mineral oil reﬁnery, burnt of sulphur including fuel, sends alrams and notiﬁes danger.

Hydrogen Sulphide Monitor

Sulpher Dioxide Monitor

Sulpher Dioxide Monitor

Wearable/Diffusion Type
Downward sensor impervious to waterdrop and dust particles
Compact light size to ﬁt to a belt or pocket for hands-free work

For toxic prevention

For toxic prevention

TPA-5200P

Model
Measuring gas
Detection principle
Sensor model used
Sampling method
Measuring range
Resolution
Indication accuracy＊1

TPA-5300P

TPA-5200P
Hydrogen sulphide
Chronoamperometry
KHS-5P
Diffusion type
0.0 ～ 50.0ppm
0.1ppm0～30ppm :±1.5ppm
Above 30.1ppm :±3ppm

TPA-5300P
Sulphur dioxide
Chronoamperometry
KTS-512P
Diffusion type
0.0 ～ 50.0ppm
0.1ppm
0～5.0ppm :±0.5ppm±1dgt
Above 5.1ppm :±10% of indicated value±1dgt±30% of the alarm setting value (alarm setting value should be over 2.0ppm)

Alarm accuracySame as indication accuracy

Alarm setting value

AL1:10ppm, AL2:30ppm (configurable)

Response time

Within 25 seconds at 90% response

Within 30 seconds at 62.5% response

LCD, LED lamp, buzzer and vibration-10 ～ 40℃ 30 ～ 85%RH (non-condensing)2 x AAA size alkaline battery
Approx. 600 hours
100 (W) ×54 (H) ×23 (D) mm approx.100g (including batteries)
Softcase with a clip
Sensor cord with adaptor (5m·10m·20m·30m)

LCD, LED lamp, buzzer and vibration-10 ～ 45℃ 35 ～ 85%RH (non-condensing)2 x AAA size alkaline battery
Approx. 600 hours
100 (W) ×54 (H) ×23 (D) mm approx.100g (including batteries)
Softcase with a clip
Sensor cord with adaptor (5m·10m·20m·30m)

Alarm method
Temperature·humidity
Power supply
Run time＊2
Size·weightStandard accessory
OptionAL1:2.0ppm

AL2:15.0ppm (configurable)＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

7Multi-Gas Monitors

Notify danger of oxygen deficiency and explosion by comubstible gas in real time.

Oxygen·Combustible Gas Monitor
Portable/Suction Type
Delivers loud sound alarm
Fast response time
For oxygen deficiency·explosion prevention

MD-620E (Combustible gas･Calibrated as iso-Butane)(MD-621E, Methane calibrated is available)
Explosion-Proof
approved
Intrinsic safety

Oxygen·Hydrogen Monitor
Portable/Suction Type
Sensor for Hydrgen detection receives
less interferences from other combustible gases
For residual oxygen·explosion prevention

MD-619E

Ideal for detecting residual oxygen concentration and hydrogen in inert gas
Explosion-Proof
approved
Intrinsic safety

Leather case for
MD-600 series

Carrying case for
MD-600 series

Gas sampling tubes andhoses are different
depending on the models.

Model
Measuring gas
Detection principle
Sensor model used
Sampling method
Measuring range
Resolution

MD-620E
MD-619E
Combustible gas in the air
OxygenHydrogen
OxygenCatalytic combustion
Galvanic cell
Chronoamperometry
Galvanic cell
FC-8P
OC-6B
KTS-526
OC-6B
Suction type (approx. 0.6L/min with 5m gas sampling hose)
Suction type (approx. 0.6L/min with a gas sampling tube with 2.4m sampling probe)0 ～ 100%LEL(※ )0.0 ～ 50.0vol%0 ～ 100%LEL(※ )0.0 ～ 50.0vol%1%LEL
0.1vol%1%LEL
0.1vol%0~25.0vol%:±0.5vol%0~25.0vol%:±0.5vol%＊1
Indication accuracy±10%LEL±10%LEL
25.1~50.0vol%:±3.0vol%25.1~50.0vol%:±3.0vol%±0.5vol% against alarm±0.5vol% against alarm
Alarm accuracy±10%LEL±10%LELsetting value 18.0vol%setting value 18.0vol%
Alarm setting value ALM1:20%LEL, ALM2:0%LEL (configurable) Factory default setting ALM1:18.0vol% ALM1:20%LEL, ALM2:0%LEL (configurable) Factory default setting ALM1:0.1vol%
Within 25 seconds at 90% response Within 15 seconds at 90% response Within 25 seconds at 90% response Within 15 seconds at 90% response
Response timefrom sampling gas inlet at 20℃
from sampling gas inlet at 20℃
Alarm method
LCD, LED lamp and buzzer
LCD, LED lamp and buzzer
Explosion-proof
ExiadⅡ CT4X No.TC19587
ExiaⅡ CT4X No.TC19531
Temperature·humidity-10 ～ 40℃ below 95%RH (non-condensing)-10 ～ 40℃ 30 ～ 85%RH (non-condensing)
Pressure range
80 ～ 110kPa
80 ～ 110kPa
Power supply
3 × AA size alkaline battery (LR6)3 × AA size alkaline battery (LR6)
Run time＊2
Approx. 8 hours
Approx. 20 hours
Size·weight78(W)×200(H)×50(D)mm approx.550g (including batteries)
78(W)×200(H)×50(D)mm approx.550g (including batteries)
Gas sampling hose with ﬂoat type gas collector (5m, polyurethane)
Gas sampling tube with sampling probe (2.4m),
Standard accessory
leather case, carrying caseleather case, carrying case
OptionGas sampling hose with ﬂoat type gas collector (10m·20m·30m, polyurethane) Gas sampling hose with ﬂoat type gas collector (10m·20m·30m, polyurethane)※ %LEL ＝ Concentration of Combustible gases (vol%) ÷ Lower Explosive Limit(vol%) × 100＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

8Notify danger of oxygen deficiency, explosion by comubstible gas andtoxic gas poisoning in real time.

Multi-Gas Monitors

Multi-Gas Monitors
Portable/Suction Type● Auto span calibration of O2 sensor, auto zero adjustment of combustible gas andH2S sensor and battery capacity check when power is switched on.
● 2 power supplies (dry batteries/AC 100V).
● A data logger function for trend analysis.
● A built-in water sensor for fast suction stop (MD-801/811).

MD-801Oxygen/Combustible gas/Hydrogen sulphide

MD-811Oxygen/Combustible gas/Carbon monoxide

MD-940

Oxygen/Combustible gas/Hydrogen sulphide/Carbon monoxide

MD-940Model
Measuring gas
Detection principle
Sensor model used
Sampling method
Measuring range
Resolution

MD-811
Hydrogen sulphide
Chronoamperometry
KHS-5TA

MD-801OxygenGalvanic cell
OC-6B

Combustible gas in the air
Carbon monoxide
Catalytic combustion
Chronoamperometry
FC-8
KCS-5TA
Suction type
0.0～50.0ppm
0.0～50.0vol%0～100%LEL(※ )0～300ppm
0.1ppm0.1vol%1%LEL
1ppm
0~30ppm:±1.5ppm
0~25.0vol% :±0.5vol%0~100ppm:±10ppm
Indication accuracy＊1±10%LEL
Above 30.1ppm:±10% of indicated value
25.1~50.0vol% :±3.0vol%
Above 101ppm:±10% of indicated value±1.5 ppm or ±30% of the alarm±0.5vol% against alarm±10%LEL or ±25% of the alarm±15 ppm or ±30% of the alarm
Alarm accuracy
setting value, whichever is greater
setting value 18.0vol%setting value, whichever is greater setting value, whichever is greater
Alarm setting value
10.0ppm
Below 18.0vol%20%LEL
50ppm
Response time
Within 25 seconds at 90% response without gas sampling tube
Alarm method
LCD, LED lamp and buzzer
Temperature·humidity-10 ～ 40℃ 30 ～ 85%RH (non-condensing)Power supply
4 × D size alkaline battery
AC100V (used with adaptor)
Run time＊2
Approx. 35 hours with alkaline dry batteries
Size·weight230(W)×165(H)×130(D)mm approx. 2.8kg
Standard accessory
Gas sampling tube with ﬂoat type gas collector (with 8m reel), carrying case

※ %LEL ＝ Concentration of Combustible gases (vol%) ÷ Lower Explosive Limit(vol%) × 100＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

9Multi-Gas Monitors

Notify danger of oxygen deficiency and carbon monoxide poisoning.

Oxygen·Carbon Monoxide Monitors
Wearable/Diffusion Type
Downward sensor impervious to waterdrop and dust particles
Compact light size to fit to a belt or pocket for hands-free work

For oxygen deficiency·toxic prevention

MMP-10Capable of remote detection
with an optional sensor cord

Portable/Suction Type
Delivers loud sound alarm
Fast response time

For oxygen deficiency·
toxic prevention

MD-611E
Explosion-Proof
approved
Intrinsic safety

Leather case for
MD-600 series

Carrying case for
MD-600 series

Gas sampling tubes andhoses are different
depending on the models.

Model
Measuring gas
Detection principle
Sensor model used
Sampling method
Measuring range
Resolution

MD-611E
Carbon monoxide
OxygenChronoamperometry
Galvanic cell
KCS-5P
OC-6B
Diffusion type
Suction type (approx. 0.6L/min with 5m gas sampling hose)
0 ～ 500ppm
0.0 ～ 50.0vol%0 ～ 500ppm
0.0 ～ 50.0vol%1ppm
0.1vol%1ppm
0.1vol%0~100ppm:±10ppm
0~25.0vol%:±0.5vol%0~100ppm:±10ppm
0~25.0vol%:±0.5vol%
Indication accuracy＊1
Above 101ppm:±10% of indicated value
25.1~50.0vol%:±3.0vol%
Above 101ppm:±10% of indicated value
25.1~50.0vol%:±3.0vol%0~100ppm:±10ppm±0.5vol% against alarm±15 ppm or ±30% of the alarm±0.5vol% against alarm
Alarm accuracy
Above 101ppm:±10% of indicated value
setting value 18.0vol%setting value, whichever is greater
setting value 18.0vol%
Alarm setting value ALM1:50ppm, ALM2:150ppm (configurable) Factory default setting AL1:18.0vol% ALM1:50ppm, ALM2:100ppm (configurable) Factory default setting ALM1:18.0vol%
Within 25 seconds at 90% response Within 15 seconds at 90% response Within 25 seconds at 90% response Within 15 seconds at 90% response
Response timeat 20℃from sampling gas inlet at 20℃
Alarm method
LCD, LED lamp and buzzer
LCD, LED lamp and buzzer
Explosion-proof―
ExiaⅡ CT4X No.TC19531
Temperature·humidity-10 ～ 40℃ 30 ～ 85%RH (non-condensing)-10 ～ 40℃ 30 ～ 85%RH (non-condensing)
Pressure range
80 ～ 110kPa
80 ～ 110kPa
Power supply
3 × AAA size alkaline battery (LR03)
3 × AA size alkaline battery (LR6)＊2
Approx. 800 hours
Approx. 16 hours
Run timeSize·weight106(W)×56(H)×29(D)mm approx.180g (including batteries)
78(W)×200(H)×50(D)mm approx.550g (including batteries)
Gas sampling hose with ﬂoat type gas collector (5m, polyurethane),Standard accessory
Softcase with a clip
leather case, carrying caseGas sampling hose with ﬂoat type gas collector (10m·20m·30m, polyurethane)
OptionSensor extension code (5m·10m·20m·30m) with adaptor
Carbon monoxide
ChronoamperometryKCS-5P

MMP-10

OxygenGalvanic cell
OC-6B

＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

10Notify danger of oxygen deficiency and hydrogen sulphide poisoning.

Multi-Gas Monitors

Oxygen·Hydrogen Sulphide Monitors
Wearable/Diffusion Type
Downward sensor impervious to waterdrop and dust particles
Compact light size to fit to a belt or pocket for hands-free work

For oxygen deficiency·toxic prevention

MMP-12
Explosion-Proof
approved
Intrinsic safety

Capable of remote detection
with an optional sensor cord

Portable/Suction Type
Delivers loud sound alarm
Fast response time

For oxygen deficiency·
toxic prevention

MD-612E
Explosion-Proof
approved
Intrinsic safety

Model
Measuring gas
Detection principle
Sensor model used
Sampling method
Measuring range
Resolution

MD-612E
Hydrogen sulphide
OxygenChronoamperometry
Galvanic cell
KHS-5P
OC-6B
Diffusion type
Suction type (approx. 0.6L/min with 5m gas sampling hose)
0.0 ～ 50.0ppm
0.0 ～ 50.0vol%0.0 ～ 50.0ppm
0.0 ～ 50.0vol%0.1ppm0.1vol%0.1ppm0.1vol%0~30.0ppm:±1.5ppm
0~25.0vol%:±0.5vol%0~30.0ppm:±1.5ppm
0~25.0vol%:±0.5vol%
Indication accuracy＊1
Above 30.1ppm:±3.0ppm
25.1~50.0vol%:±3.0vol%
Above 30.1ppm:±3.0ppm
25.1~50.0vol%:±3.0vol%0~30.0ppm:±1.5ppm±0.5vol% against alarm
0~30.0ppm:±1.5ppm±0.5vol% against alarm
Alarm accuracy
Above 30.1ppm:±3ppm
setting value 18.0vol%
Above 30.1ppm:±3.0ppm
setting value 18.0vol%
Alarm setting value AL1:10.0ppm, AL2:30.0ppm (configurable) Factory default setting AL1:18.0vol% ALM1:10.0ppm, ALM2:20.0ppm (configurable) Factory default setting ALM1:18.0vol%
Within 25 seconds at 90% response Within 15 seconds at 90% response Within 25 seconds at 90% response Within 15 seconds at 90% response
Response timeat 20℃from sampling gas inlet at 20℃
Alarm method
LCD, LED lamp and buzzer
LCD, LED lamp and buzzer
Explosion-proof
ExiaⅡ CT4X No.TC19102
ExiaⅡ CT4X No.TC19531
Temperature·humidity-10 ～ 40℃ 30 ～ 85%RH (non-condensing)-10 ～ 40℃ 30 ～ 85%RH (non-condensing)
Pressure range
80 ～ 110kPa
80 ～ 110kPa
Power supply
3 × AAA size alkaline battery (LR03)
3 × AA size alkaline battery (LR6)＊2
Approx. 800 hours
Approx. 16 hours
Run timeSize·weight106(W)×56(H)×29(D)mm approx.180g (including batteries)
78(W)×200(H)×50(D)mm approx.550g (including batteries)
Gas sampling hose with ﬂoat type gas collector (5m, polyurethane), leather case, carrying caseStandard accessory
Case with hung-down belt
Gas sampling hose with ﬂoat type gas collector
OptionSensor code with adaptor (5m·10m·20m·30m)(10m·20m·30m, ﬂexible ﬂuorine (ETFE) resin)
Hydrogen sulphide
Chronoamperometry
KHS-5P

MMP-12OxygenGalvanic cell
OC-6B

＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

11Flue Gas Testers

Easy check on combustion efficiency to promote energy savings

An integral part of the energy savings in boiler,
incinerating furnace, gas engine is to measureoxygen in flue gas.
Combustion control by measuring oxygenin flue gas is essential to prevent air pollution.
Oxygen sensor OC-6B is capable of measuringoxygen concentration in inert gas
such as nitrogen, carbon dioxide

Carbon Monoxide Monitor

Oxygen Monitor
For measuring oxygen in ﬂue gas

For measuring carbon monoxide in ﬂue gas

Portable/Suction Type
Fast response time

TX-611H
Model
Measuring gas
Detection principle
Sensor model used
Sampling method
Measuring range
Resolution
Indication accuracy＊1
Alarm accuracy
Alarm setting value
Response time
Alarm method
Temperature・
humidity
Power supply
Run time＊2
Size·weightStandard accessory
Flue gas temp.(option)

OX-600
TX-611H
Carbon monoxide
ChronoamperometryKCS-5T (YZ)

OX-600
OxygenGalvanic cell
OC-6B
Suction type approx. 0.6L/min(with gas sampling probe with NOx filter)0 ～ 5000ppm
1ppm
0~200ppm:±20ppm
Above 201ppm :±10% of indicated value(with gas sampling probe)
0.0 ～ 25.0vol%0.1vol%±0.5vol%

Same as indication accuracy
Instantaneous values ALM1:0.0% (alarm release), ALM2:0.0% (alarm release)
Instantaneous values ALM1:801ppm, ALM2:0ppm (alarm release)
Mean value ALM3:0.0% (alarm release) (configurable)
Mean value ALM3:801ppm (configurable)
Within 15 seconds at 90% response
from sampling gas inlet at 20℃
LCD, LED lamp and buzzer-10 ～ 40℃

30 ～ 85%RH (non-condensing)

3 × AA size alkaline battery (LR6)Approx. 20 hours
78(W)×200(H)×50(D)mm approx.550g (including batteries)
Carrying case with probe storage and shoulder strap, dust filter
Gas sampling probe with NOx filter,
Gas sampling probe
nozzle with hood, key-shaped nozzle
Temperature probe (in case type K is connected) measuring range:0 ～ 750℃ indication accuracy:±5℃＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

12Flue Gas Tester

Oxygen·Carbon Monoxide Monitor
For measuring oxygen・carbon monoxide in ﬂue gas

Portable/Suction Type
Fast response time

Leather case for
OX, TX, MX-600 series

MX-611H
Model
Measuring gas
Detection principle
Sensor model used
Sampling method
Measuring range
Resolution

MX-611H
Carbon monoxide
OxygenChronoamperometry
Galvanic cell
KCS-5T(YZ)
OC-6B
Suction type approx. 0.6L/min (with gas sampling probe with NOx filter)0 ～ 5000ppm
0.0 ～ 25.0vol%1ppm
0.1vol%0~200ppm: indicated value±20ppm＊1
Indication accuracy±0.5vol%
Above 201ppm:±10% of indicated value
Alarm accuracySame as indication accuracy
Instantaneous values ALM1:0ppm (alarm release), ALM2:0ppm (alarm release) Instantaneous values ALM1:0.0% (alarm release), ALM2:0.0% (alarm release)
Alarm setting value
Mean value ALM3:0ppm (alarm release) (configurable)
Mean value ALM3:0.0% (alarm release) (configurable)
Response time
Within 15 seconds at 90% response from sampling gas inlet at 20℃
Alarm method
LCD, LED lamp and buzzer
Temperature·humidity-10 ～ 40℃ 30 ～ 85%RH (non-condensing)Power supply
3 × AA size alkaline battery (LR6)
Run time＊2
Approx. 20 hours
Size·weight78(W)×200(H)×50(D)mm approx.550g (including batteries)
Carrying case with probe storage and shoulder strap, dust filter,
Standard accessory
gas sampling probe with NOx filter, nozzle
Measuring range
0 ～ 750℃
Flue gas temp.
Temperature probe(option)(in case type K is connected)
Indication accuracy±5℃＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

13Fixed Type Combustible Gas Alarm System
For explosion prevention, leak detection, continuous exposure

Fixed type 24-hour gas monitoring system of leak or evaporation
at manufacturing/filling site, storage, consumption facility or possible
hazardous area of combustible gases/liquid and high-pressure gases.

Alarm Meters (monitoring)

Combustible Gas Detectors (on-site)

Used in combination with 1 gas detector for 1 sampling point

Used in combination with alarm meters

Wall-mount type/1 sampling point

Catalytic
combustion(Built-in panel type is optional)

Heat wire
semiconductor

RDE-T/Diffusion type
Sensor model used:C-10S
ExExplosion-proof

RDE-TS/Diffusion type
Power supply
AC100V

Sensor model used:
SC-401S, SC-403S, SC-404S

3-core cable

FA-480

ExExplosion-proof

RD-4 Hydrogen/Diffusion type
Sensor model used:
C-10H, SC-202H
Flame-proof
Power supply
AC100VFA-4905-core cable

RH-S/Suction type2-step alarm is optional

Sensor model used:
C-10S, SC-401S,
SC-403S, SC-404S

φ6/φ4 piping

Flame-proof※Gas detectors are not drip-proof type and requirea drip-proof cover for preventing entry of water drops (page 20).
Model
FA-480(1 sampling point)
FA-490(1 sampling point)
Measuring gas
Combustible gas in the air
Detection principle
Catalytic combustion or heat wire semiconductor
Depends on the measuring gases
Measuring range(0 ～ 100%LEL(※ ),0 ～ 500ppm,0 ～ 2000ppm,0 ～ 5000ppm)
Display method
LED digital
Catalytic combustion:Within ± 5% of full-scale＊1
Indication accuracy
Heat wire semiconductor:Within ± 20% of full-scale
Alarm accuracy＊1
Within ±25% of alarm setting value
User-configurable
User-configurable 2-step alarm
Alarm setting value(25%LEL,500ppm,1000ppm) (25%LEL,500ppm,1000ppm,no alarm)
Alarm·Trouble
Flashing red LED light and intermittent buzzer soundmethod2 gas alarms and 1 trouble alarm→
Alarm contact
Gas alarm AL1→
non-voltage 1a or 1b contact
non-voltage 1a or 1b contact
outputContact capacity
AC125V,0.6A or DC110V,0.6A or DC30V,2A (resistance load)
Analogue output
DC4 ～ 20mA±0.1mA
Temperature·humidity-10 ～ 40℃ below 95%RH (non-condensing)Power supply
AC100V±15% 50/60Hz １φ
Power
Diffusion type; approx. 5VA Suction type; approx. 20VA
consumptionSize
120(W)×205(H)×69(D)mm (with fittings)
WeightApprox. 0.9kg
OptionDiffusion type input power supply:AC200/220V,DC24V＊ 1 Same condition at the time of calibration performed.

14

Model
Measuringgas
Detection
principle
Sampling
method

RDE-T

RDE-TS

Combustible gas in the air
Catalytic
combustion

Heat wire
semiconductor

Size(W)× (W)× (D)WeightRH-S
Combustible gas
Hydrogenin the air
Catalytic combustion (F)·heat wire semiconductor (S)Diffusion
ExdⅡ BT4

Explosion-proof

RD-4

No.TC17154

No.TC17155

100×173×81mm
Approx. 1.0kg

Suction
d3aG4

d2G4

No.T23332 (F)No.T46344
No.T56886 (S)140×175×110 355×325×108mm
mm
Approx. 4.2kg
Approx. 6.3kg

Contact us for target gases, measuring ranges and alarm setting values
customized for particular usages.

Fixed Type Combustible Gas Alarm System

Alarm Meter (monitoring)

Combustible Gas Detectors (on-site)

Used in combination with 1 gas detector for 1 sampling point

Used in combination with alarm meters

Wall-mount type/1 sampling point

Can be used as a stand-alone without alarm meters(Built-in panel type is optional)

URA-800/Suction type

NDIR

ExExplosion-proof

φ6/φ4 piping

URA-700/Suction type
ExExplosion-proof
Power supply
AC100V

2-coreshielded cable

φ6/φ4 piping

UA-480

FMA-7UR/Suction type

Power supply
AC100VPower supply
AC100VPower supply
AC100V
φ6/φ4 piping※Gas detectors are not drip-proof type.
Model
UA-480(1 sampling point)
Model
FMA-7UR
URA-700
URA-800
Measuring gas Hydrocarbon in the air or inert gas Measuring gas
Hydrocarbon in the air or inert gas
Detection principle Non-dispersive infrared ray (NDIR) Detection principle
Non-dispersive infrared ray (NDIR)
ﬂuid modulation
Measuring range
0 ～ 100%LEL(※ )Sampling method
Suction type with a built-in sampling pump
Sampling volume
Display method
LED digital＊1
Approx. 0.7L/min
Approx. 0.5L/min
Approx. 2L/min
Alarm accuracy±25% of alarm setting value Indcation accuracy
Alarm setting value
User-configurable (25%LEL)
Measuring range
0 ～ 100%LEL(※ )Depending on the measuring gases (Methane:0 ～ 5000ppm,0 ～ 50000ppm)
Alarm·Trouble
Flashing red LED light and
Display method
LCD digital
methodintermittent buzzer soundIndcation accuracy＊1
WIthin ±5% of full-scale
Alarm contact
Non-voltage 1a or 1b contact
Alarm setting value User-configurable 2-step alarm (standard 1-step alarm)―
User-configurable 2-step alarm
outputShows AL1 or AL2
Contact
AC125V,0.6A or DC110V,0.6A―
Shows AL1 or AL2
Alarm method
Flashing alarm lamp and intermittent buzzer soundcapacityor DC30V,2A (resistance load)
Trouble method
Displays FAIL or FLOW
Displays FAIL and trouble cause
Displays FAIL or FLOW
Analogue output
DC4 ～ 20mA±0.1mA
Alarm contact output
AL1:1ab Trouble:1ab―
AL1:1ab Trouble:1ab (consult for option)
Temperature·-10 ～ 40℃ below 95%RH
humidity(non-condensing)Contact capacity
AC125V,0.5A orDC30V,2A―
AC125V,0.5A or DC30V,0.5A
Power supply
AC100V±15% 50/60Hz １φ
In case of 62.5% indication:witin 30 seconds
In case of 62.5% indication:witin 30 seconds
Response time(the piping must be within 15m, φ6/φ4)(the piping must be within 5m, φ6/φ4)Power
Approx. 3.5VA
consumption(excluding gas detector)
Analogue output Gas concentration signal:DC4~20mA/full-scale, liner output, trouble signal:1mA, power loss:0mA
Size
120×205×69mm
Explosionproof―
ExdⅡ BT4X No.TC13417
ExdⅡ BT4X No.TC17630(W)× (W)× (D)(with fittings)
Temperature·humidity-10 ～ 40℃ below 95%RH (non-condensing)
WeightApprox. 0.9kg
Power supply
AC100V-15 ～ +10% 50/60Hz １φ
input power supply:AC200/220V,DC24V Power consumption
Approx. 25VA
Approx. 40VA
Optionfailure contact output, 2-step alarm
Size(W)×(W)×(D)
256×350×155mm
280×480×160mm
300×480×200mm
WeightApprox. 10kg
Approx. 20kg
Approx. 30kg

Contact us for target gases, measuring ranges and alarm setting values customized for particular usages.
※ %LEL ＝ Concentration of Combustible gases (vol%) ÷ Lower Explosive Limit(vol%) × 100＊1 Same condition at the time of calibration performed.
Periodical inspection is recommended for long time full performance of the system.

15

Fixed Type Oxygen Alarm System
For oxygen deficiency prevention

Alarm Meter (monitoring)

Oxygen Detectors (on-site)

Used in combination with 1 gas detector for 1 sampling point

Used in combination with alarm meters

Wall-mount type/1 sampling point

Galvanic cell

(Built-in panel type is optional)

OH-D4A/Diffusion type
Sensor model used:OC-6B

Power supply
AC100V

OA-480

OH-D4E/Diffusion type2-coreshielded cable

Used in combination with zenner barrier
Sensor model used:OC-6B

2-core cable(For suction pump power supply)

Insrinsic safe

TRD-1G/Diffusion type
Sensor model used:OC-6E
Flame-proof

OH-S4/Suction type
Sensor model used:OC-6B
OH-S4 has a built-in ﬂow meter,a sampling pump and a sensor.

φ6/φ4 piping※Gas detectors are not drip-proof type and requirea drip-proof cover for preventing entry of water drops (page 20).
Model
OA-480(1 sampling point)
Measuring gas
Oxygen in the air
Detection principle
Galvanic cell
Measuring range
0.0 ～ 25.0vol%
Display method
LED digital
Indication·Alarm
WIthin ±0.7vol%accuracy＊1
Alarm setting value
User-configurable (standard:18.0vol%)Alarm·Trouble method Flashing red LED light and intermittent buzzer soundAlarm contact output
Non-voltage 1a or 1b contact
AC125V,0.6A or DC110V,0.6A or DC30V,2A
Contact capacity(resistance load)
Analogue output
DC4 ～ 20mA±0.1mA
Temperature·humidity-10 ～ 40℃ Below 95%RH (non-condensing)Power supply
AC100V±15% 50/60Hz １φ
Power
Diffusion type approx. 5VA Suction type approx. 20VA
consumptionSize
120(W)×205(H)×69(D)mm(with fittings)
WeightApprox. 0.9kg
Input power supply:AC200/220V,DC24V
OptionAlarm contact output, 2-step alarm

Model
Measuring gas
Detectionprinciple
Sampling
methodExplosionproof
Size(W)× (H)× (D)WeightOH-D4A

16

TRD-1G
Oxygen in the air
Galvanic cell

Diffusion type
ExiaⅡ CT4X―
No.TC14354
92×160×70mm
Approx. 0.7kg

Contact us for other measuring ranges and alarm setting values customized for particular usages.
＊ 1 Same condition at the time of calibration performed.
＊ 2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

OH-D4E

OH-S4

Suction typed3aG4―
No.T41486
220×116×122mm 219×350×160mm
Approx. 4kg
Approx. 2.4kg

Fixed Type Toxic Gas Alarm System
For toxic prevention, leak detection

Alarm Meter (monitoring)

Toxic Gas Detectors (on-site)

Used in combination with 1 gas detector for 1 sampling point

Used in combination with alarm meters

Wall-mount type/1 sampling point

Chronoamperometry(Built-in panel type is optional)

TH-D4A/Diffusion type

Power supply
AC100V

TA-480Measuring gas
Carbon monoxide
Hydrogen sulphide
Ammonia

TH-D4E/Diffusion type2-coreshielded cable

Used in combination with zenner barrier

2-core cable(For suction pump power supply)

Insrinsic safe

Sensor model usedTH
TRD
KCS-5P/5T
KCS-5E
KHS-5P/5TA KHS-5E
KTS-517―

TRD-1T/Diffusion type
Flame-proof

TH-S4(Carbon monoxide)/Suction type
TH-S5(Other than Carbon monoxide)/Suction type
TH-S4/5 has a built-in ﬂow meter,a sampling pump and a sensor.
φ6/φ4 piping※Gas detectors are not drip-proof type and requirea drip-proof cover for preventing entry of water drops (page 20).
Model
Measuring gas
Detection principle
Measuring range
Display method

Indication accuracy＊1
Alarm accuracy＊1
Alarm setting value
Alarm·Trouble method
Alarm contact output
Contact capacity
Analogue output
Temperature·humidity
Power supply
Power consumption
Size·Weight
OptionModel
Measuring gas
Detection method
Sampling method
Explosionproof
Size(W)× (H)× (D)WeightTA-480(1 sampling point)
Hydrogen sulphide
Ammonia
Chronoamperometry
0 ～ 300ppm
0.0 ～ 50.0ppm
0 ～ 100ppm
LED digital
0 ～ 150ppm :±15ppm
0.0 ～ 30.0ppm :±1.5ppm
0 ～ 75ppm :±7.5ppm
150 ～ 300ppm :Within ±10% of indicated value
30.0 ～ 50.0ppm :±3.0ppm
75 ～ 100ppm :Within ±10% of indicated value±30% of alarm setting value±3.0ppm of alarm setting value±30% of alarm setting value
User-configurable (50ppm)
User-configurable (10.0ppm)
User-configurable (25ppm)
Flashing red LED light and intermittent buzzer soundNon-voltage 1a or 1b contact
AC125V,0.6A, DC110V,0.6A or DC30V,2A (resistance load)
DC4 ～ 20mA±0.1mA-10 ～ 40℃ below 95%RH (non-condensing)
AC100V±15% 50/60Hz １φ
Diffusion type; approx. 5VA Suction type; approx. 20VA
120(W)×205(H)×69(D)mm (including fittings) approx. 0.9kg
Input power supply:AC200/220V,DC24V alarm contact output, 2-step alarm

Carbon monoxide

TH-D4A
TH-D4E
Carbon monoxide, Hydrogen sulphide, Ammonia―

Diffusion type
ExiaⅡ CT4 No.TC15708
92×160×70mm
Approx. 0.7kg

TRD-1T
Carbon monoxide, Hydrogen sulphide
Chronoamperometry
d3aG4 No.T41486
220×116×122mm
Approx. 4kg

TH-S4
Carbon monoxide

TH-S5
Other than Carbon monoxide

Suction type―219×350×160mm
Approx. 2.4kg

Contact us for other measuring gases such as Sulphur dioxide, Nitrogen oxide, etc, their ranges and alarm setting values
customized for particular usages.
＊ 1 Same condition at the time of calibration performed.
Periodical inspection is recommended for long time full performance of the system.

17

Fixed Type Gas Alarm System-Multiple Sampling Points

Alarm Meters (monitoring)

Used in combination with gas detectors on page 13 to 17.

Used in combination with 1 gas detector for 1 sampling point

Wall-mount or built-in panel type/Multiple sampling points◆ Display gas concentration in LCD bar meter and digital meter◆ Simple zero adjustment(span adjustment for oxygen) ·peak-hold function·zero suppression function【Wall-mount type, multiple sampling points】

KA-704R Maximum 4 sampling points
KA-708R Maximum 8 sampling points＜KA-708R＞【Built-in panel type】

KU-7R

Self-contained gas alarm system multiple
KU-7R installed on to a panel can be
designed. Contact us for details.

KA-704R(4 sampling points)
KA-708R(1 ～ 8 sampling points)
Combination of combustible gases · oxygen · toxic gases
Refer to below detection principle of KU-7R Series
Refer to below detection principle of KU-7R Series
LCD bar with 51 segments and 4 figures LCD digital meter
Refer to below alarm accuracy of KU-7R Series
2-step alarm, user-configurable, upper or lower limit available
Flashing red LED light, LCD ﬂashing, intermittent buzzer soundPower lamp changes to intermittent red light from green, intermittent buzzer sound
Delegate non-voltage 1ab, individual 1a or 1b
DC4 ～ 20mA
-10 ～ 40℃
AC100V±10% 50/60Hz 1φ
Max. 150VA
Max. 300VA
Power consumption
depends on applied gas detectors
Size·weight300(W)×370(H)×100(D)mm approx.5.5kg 500(W)×370(H)×100(D)mm approx.10kg

Model
Measuring gas
Detection principle
Measuring range
Display method
Alarm accuracy＊1
Alarm setting value
Alarm method
Trouble method
Alarm contact output
Analogue output
Operating temperaturePower supply

Type of KU-7R series
Model
Measuring gas
Detection principle

KU-7R/GKU-7R/F
KU-7R/SKU-7R/UKU-7R/T3Ｃ
KU-7R/T5B
KU-7R/T1C
OxygenCombustible gas
Carbon monoxide Hydrogen sulphide
Ammonia
Galvanic cell
Catalytic combustion Heat wire semiconductor
NDIR
Chronoamperometry
depends on measuring gas(0.0 ～ 30.0ppm,
0.0 ～ 25.0vol% 0 ～ 100%LEL 0 ～ 2000ppm
0 ～ 100%LEL(※ )Measuring range
0.0 ～ 50.0ppm,0 ～ 100ppm,0 ～ 300ppm)
0.0 ～ 50.0vol%(※ )0 ～ 5000ppm 0 ～ 2000ppm,0 ～ 5000ppm
Display method
LCD bar with 51 segments and 4 figures LCD digital meter
Alarm accuracy＊1±0.7vol%±25% of alarm setting value
Alarm setting value
2-step alarm, user-configurable, upper or lower limit available
Alarm:Flashing red LED light(AL1, AL2) Trouble:Power lamp lights after ﬂasing red light from green
Alarm·Trouble display
Alarm(AL1, AL2):Non-voltage 1a or 1b Trouble:Non-voltage 1a or 1b
Contact output
Analogue output
DC4 ～ 20mA
Operating temperature-10 ～ 40℃
Power supply
DC24V±10%Power consumption Approx. 7.5VA
Approx. 10VA
Approx. 12VA
Approx. 7.5VA
Size·weight
36(W)×144(H)×176(D)mm (with a single case) approx. 0.8kg※%LEL＝Concentration of Combustible gases (vol%)÷ Lower Explosive Limit(vol%)×100＊1 Same condition at the time of calibration performed.
Periodical inspection is recommended for long time full performance of the system.

18

Fixed Type Combustible Gas Alarm System-Multiple Sampling Points
For explosion prevention, leak detection, continuous exposure

Alarm Meters (monitoring)

Combustible Gas Detectors (on-site)

Used in combination with 1 gas detector for 1 sampling point

Used in combination with alarm meters

Wall-mount type/1 ～ 6 sampling points

Catalytic
combustion

FA-20F

Heat wire
semiconductor

Refre to page 14

RDE-T/Diffusion type
Sensor model used:C-10S
ExExplosion-proof

RDE-TS/Diffusion type
Sensor model used:
SC-401S, SC-403S,
SC-404S
ExExplosion-proof

RD-4 Hydrogen/Diffusion type
Power supply
AC100V

5-corecable

Sensor model used:
C-10H, SC-202H

3-corecable

Flame-proof

Wall-mount type/1 ～ 2 sampling points
Built-in emergency power backup systemenables continuous monitoring in the event of
black out

FA-30

RH-S/Suction type
φ6/φ4 piping

Sensor model used:
C-10S, SC-401S,
SC-403S, SC-404S
Flame-proof

Power supply
AC100V※Gas detectors are not drip-proof type and requirea drip-proof cover for preventing entry of water drops (page 20).

3-core cableModel
Measuring gas
Detection principle
Measuring range
Display method
Alarm accuracy＊1
Alarm setting value
Alarm method
Trouble method
Alarm contact
outputContact capacity
Response time
Analogue output
Temperature·humidity
Power supply
Power consumption
Size
WeightEmergency power
backupFA-20F(1 ～ 6 sampling points)

FA-30(1 ～ 2 sampling points)
Combustible gas in the air

Catalytic combustion or heat wire semiconductor
Depends on measuring gas(0 ～ 100%LEL(※ ),0 ～ 500ppm,0 ～ 2000ppm,0 ～ 5000ppm)

Catalytic combustion
0 ～ 100%LEL(※ )LED digital
Within ±25% of alarm setting value
User-configurable (25%LEL,50ppm,500ppm,1000ppm)
User-configurable 2-step-alarm (AL1:10%LEL,AL2:25%LEL)
Flashing red LED light and intermittent buzzer soundFlashing yellow LED light and intermittent buzzer soundFlashing red LED light and intermittent buzzer soundGas concentration alarm
AL1 → non-voltage 1a or 1b
Delegate non-voltage 1a or 1b〃
AL2 → 〃
AC125V,0.6A or DC110V,0.6A or DC30V,2A (resistance load)―
Within 30 seconds till alarm generates after detecting test gas of 1.6 times of alarm concentration
Optional:DC4 ～ 20mA
DC4 ～ 20mA±0.1mA-10 ～ 40℃ below 95%RH (non-condensing)
AC100V±10% 50/60Hz １φ
Diffusion type; approx. 3.5VA/point, Suction type; approx. 19VA/point
approx. 25VA
300(W)×510(H)×70(D)mm (without fittings)
360(W)×330(H)×80(D)mm (without fittings)
Approx. 7.6kg (6 points)
Approx. 8.5kg
Built-in battery―
Back-up time:approx. 2 hours (at 20℃ , no alarm activation)

Contact us for target gases, measuring ranges and alarm setting values customized for particular usages.

＊ 1 Same condition at the time of calibration performed.

19

Optional Parts For Fixed Type Gas Detectors
Gas detectors are not drip-proof and require protective
drip-proof covers in case they are exposed to waterdrop.

For Diffusion Type Detectors
Drip-proof covers

HC-B(upright)
Model

Used withSize

HC-B2(horizontal)

HC-E

For underﬂoor installation

For Hydrogen detector

HC-B
OH-D4A/D4E,RDE-T/TS,
TH-D4A/D4E
170(W)×150(H)×100(D)mm

HC-G(horizontal)

HC-B2

HC-E

HC-G

RDE-T/TS

RD-4

TRD-1G/1T

220(W)×120(H)×155(D)mm

180(W)×170(H)×140(D)mm

320(W)×220(H)×160(D)mm

For Suction Type Detectors
drip-proof cover, air filter, flow meter
Detector boxes for Model RH-S Combustible Gas Detector withmeasurement valve, calibration valve

For indoor installation/upright

For indoor・outdoor installation/horizontal

BOX-18

BOX-3B
BOX-3BDL (with diluter) detects in inert gas

Model
Size

BOX-18340(W)×420(H)×150(D)mm

Air filters

BOX-3B/3BDL
500(W)×400(H)×140(D)mm

Drain traps

Gas collector

Large
Small

MediumKG-T

MGF-5.4

Attached to a gas collector
to prevent from dust particle suction.

Model
KG-T
MGF-5.4
ML-701/-AUD2

20

ML-701
Installed in front of gas detetors
ML-701-AUD2 to prevent from waterdrop in case

Automatic drain type gas includes moisture or condensation
expected in the piping due tohigh-temperature gas.

Filter made of
Paper
Sintered metal, paper filter
Sintered metal

Model
GD-3
GD-PE
GD-4

GD
Installed at a sampling point toprevent from dust particle suction.

FeatureFor general use, high durable metallic
Low price, easy to replace
Stainless made is useful for special occasion

Filter made ofSintered metal
Paper
Sintered metal, SUS

Gas Sensors<C-10S>

Model
Measuring gas
Detection principle<SC-403S>

Used in gas detectors
Size·weight

OC-6B
OxygenGalvanic cell
OPA-5000E,OMA-600E,OM-600E,
MMP-10/12,MD-611E/612E/619E/620E/621E,
MD-801/811/940,OX-600,MX-611H,OA-220
OH-D4A/D4E,OH-S4
φ20.0× L20.8L20.8mm Approx. 10g

Model
Measuring gas
Detection principle
Used in gas monitors
Used in gas detectors
Size·weight

C-10S
Combustible gas in the air
Catalytic combustion―
RDE-T,RH-S
φ28.0× L28.0mm Approx. 105g

Used in gas monitors

Model
Measuring gas
Detection principle
Used in gas monitors
Used in gas detectors
Size·weight

KCS-5P
Carbon monoxide
Chronoamperometry
TPA-5000E,MMP-10,MD-611E
TH-D4A/D4E,TH-S4

FC-8P
Combustible gas in the air
Catalytic combustion

SC-311P
Combustible gas in the air
Heat wire semiconductor

FPA-5000E/5000EM,
FM-620E/621E,MD-620E/621E

FPA-5200E―

φ20.0× L20.0mm

SC-403S
Methane in the air
Heat wire semiconductor―
RDE-TS,RH-S
φ28.0× L28.0mm Approx. 105g
KHS-5P
Hydrogen sulphide
Chronoamperometry
TPA-5200P,MMP-12,MD-612E

φ20.5× L19.7mm

Approx. 9g

KTS-512P
Sulphur dioxide
Chronoamperometry
TPA-5300P
TH-D4A/D4E,TH-S5―
Approx. 35g
KTS-526
Hydrogen
Chronoamperometry
FM-619E,MD-619E
TH-D4E,TRD-1T
φ20.7× L21.5mm Approx. 9g
KTS-517
Ammonia
Chronoamperometry―

φ20.7× L21.5mm Approx. 9g

CAUTION Check the expiration date of sensors before measurement.
Expired sensors can give false results. Contact us to replace to new sensors.

21

Application Specific Instruments

Indoor Environment Monitor CO/CO2 /Temperature/Humidity
For indoor air quality measurement in buildings

UM-400◆ Compact･light･silent◆ Wide measuring ranges◆ Measures CO2/CO /temperature/humidity at one time
◆ Clearly visible organic EL display at dark places◆ Capable of trend analysis by data logger function◆ 3 power supplies

CO/CO2 Monitor

Residual Oxygen Meter

For high concentration measurement

For measurement of residual oxygen in inert gas

UR-23AU3

OA-220For process control of gas generators for heat-treated metal parts wherehigh concentration of carbon monoxide and carbon dioxide should be monitored.
Highly reliable precision NDIR method.
Displays the concentration of the 2 components digitally and outputs analog.

Compact design with a built-in suction pump.
(Contact us in case of using as an oxygen deficiency control.)Model
Measuring gas
Detection principle(sensor model)
Measuring range(resolution)

UM-400Carbon monoxide(CO)Carbon dioxide(CO2)Temperature
Humidity
Chronoamperometry(KCS-5TA-U)
NDIR
Thermistor type(Capacitance type)
0.0 ～ 100.0ppm (0.1ppm)
0 ～ 10000ppm (10ppm)-10.0 ～ 60.0℃ (0.1℃ )5.0 ～ 95.0%RH (0.1%RH)±1.0ppm at 0.0 - 10.0ppm±50ppm at 0
- 2000ppm±2.0%RH at 20.0 - 90.0%RH±0.5℃ at 5.0 - 50.0℃＊1
Indication accuracy±2.5ppm at 10.1 - 50.0ppm±100ppm at 2010 - 5000ppm±4.0%RH at other ranges±1.0℃ at other ranges±5.0ppm at 50.1 - 100.0ppm±500ppm at 5010 - 10000ppm(temperature at 10-40℃ )Response time
Within 30 seconds at 90% response Within 20 seconds at 90% response――
Data update
Every second
Every 4 seconds
Every second
Every second
Display method
Organic EL digital display
Recorder output
DC 0-1V linear
Temperature-10 - 40 degrees C (non-condensing)Power supply
4 x size AA alkaline (LR6) or nickel-metal-hydride rechargeable battery, dedicated AC adaptor 100V(optional)
Continuous run-time＊2
About 6 hours with alkaline dry batteries at 20 degrees C
Size·weight
155(W)×100(H)×83(D)mm(excluding protrusion) approx. 800g(including batteries)
Standard accessory
Carrying case, alkarine batteries, 10cm calibration tube

2mModelpower supply cable
UR-23AU3
Measuring gas
Carbon monoxide(CO)Carbon dioxide(CO2)
Detection principle
NDIR
Measuring range
0.0 ～ 5.0vol%0.0 ～ 20.0vol%
Resolution
0.1vol%0.1vol%Indication accuracy＊1±5% of full-scale
Display method
LCD digital display
Analogue output
DC 4-20mA (linear)
Temperature・humidity-10 ～ 50℃ below 90% R.H.(non-condensing)Power supply
Continuous run-time＊2
Size·weight

AC100V-15 ～ +10% 50/60Hz 1φ
Continuous operation possible
370(W)×157(H)×315(D)mm approx.7.5kg

Model
Measuring gas
Detection princeple(sensor model)
Measuring range(resolution)
Indication accuracy＊1
Alarm accuracy＊1
Alarm setting value
Alarm method
Alarm contact output
Recorder output

Galvanic cell(OC-6B)
0.0 ～ 25.0vol%(0.1vol%)±0.7vol%O2 concentration±1.0vol%O2 concentration against alarm setting valueOver 1.0vol%LED light and buzzer
Non-voltage 1b (standard) or 1a contact
DC 4-20mA±0.1mA

Temperature·humidity-10 ～ 40℃ 90%RH (non-condensing)Power supply
AC100V±10% 50/60Hz 1φ (power consumption:approx. 20VA)
Size·weight180(W)×143(H)×248(D)mm approx.3kg
Standard accessory
5m uni-tube(φ6/φ4), 2m power supply cable＊1 Same condition at the time of calibration performed.
＊2 No alarm activation using new batteries. May differ depending on battery manufactures, ambient conditions.

22

OA-220
Oxygen in inert gas

Application Specific Instruments

Emergency Shut-Off System For High-pressure Gas Cylinder Valve

Valve shutters

VS-200VS-200H2 (high torque type)◆ Runs with a combination of air pressure and mechanical energy only
◆ Good durability due to a metallic gear mechanism at internal structure◆ No harm on the main valve due to a spiral spring◆ Simple up-and-down operation of set lever to lock and release

Model

VS-200VS-200H2 (high torque type)
5.0 ～ 7.0N･m
8.0 ～ 9.0N･m(at mounting position)(at mounting position)
Main Valve opening: Manual set
Main Valve closing: Spiral spring drive

Valve shutting torqueOperating system
Operation air pressure
range
Recommended
operation air pressure
Operation air inlet
Operation check
Installing method
Size·weight●0.25 ～ 0.9MPa
0.35MPa
φ6/4mm resin tube (one-touch connection)
Colour indicator
Clamp handle system
約118(W)×296(H)×173(D)mm approx. 3.0kg

Appearance and function

Usable valve size

凹 part belowφ54mm

Contact us forother valve sizes

凸 part φ64 ～ 72mm

①Main body
②Set lever③Indicator④Handle⑤Operation control air inlet⑥Cylinder fitting⑦Clamp handle⑧Installation height adjusting screw⑨Installation clamp⑨
Adjustable height ranges(90 ～ 130)●

Example - usage●

Example - system diagram

Operates by interlocking with gas detectors and/or seismoscopes
Prevents explosion and/or poisoning accidents by gas leakage
Prevents secondary disasters by gas leakage during earthquakes

Toxic gas alarm

Combustible
Seismoscope
gas alarm (Earthquake detector)

Gas detector

Control box

Gasconsumption
equipment

Seismoscope
VS-S1

The seismoscope operates
when the earthquake measured
a lower 5 or higher on the sevenpoint Japanese scale (100 ～ 170 gal)and shuts off the main valve of
the high-pressure gas cylinder.

Valve shutter

Sensor

φ 6/4mm polyurethane tube Operation air
Solenoid valve

Line(N2 can be used as an operation air)Sensor

Gas cylinders

23

Application Specific Instruments

Portable Odor Monitors

Collect and analyze odor information in every space

Unique patented technology
analyzes odor information

Light sensor
OutputIntensity
Odor quality

Heavy sensor

OutputOdor quality： 22
Intensity：1560

A

Light sensor【Schematic chart for odor vector】

B

Odor quality： 60
Intensity：1200

Intensity

Odor quality

Heavy sensor

OutputOutputRepresents odor with vector from sensor output[Odor quality] is represented by the vector angle andodor components are judged from the angle size.
[Intensity] is represented by the vector length andodor intensity is judged from the length.
Odor A has more heavy components such as aromatics comparing toodor B and possibly has stronger odor.

<mobileⅢ>

Odor B possibly has more light components such as alcohols
comparing to odor A .

mobile Ⅲ

integral Ⅲ

Monitors odor with 2 sensors

Analyzes odor with 4 sensors

Heavy + Light

Heavy + Light + Sulphur + Ammonia

Monitors while comparing with recorded data

(Example1)

24(Example 2)

Simultaneously monitors

Automatically monitors

Application Specific Instruments
Common Function
Cleans sensors withactivated carbon filters

Confirms cleaning status of sensors
mobileⅢ

integralⅢ

Automatic switchable
vent valve

Activated carbon filters(option)Capable of odor index display by calibration curves
3 calibration curves (standard) + calibration curve by user (integral Ⅲ only)

Intensity

Displays for logger and data list installed as standard

Odor index＜integralⅢ＞

Logger display

Sensor(semiconductor)
Sampling
Spec.

Temperature·humiditySize·weightMemoryCommunication
Power supply

Numeral display

Function

Calibration curve

Measurement

Calibration

Item
Odor (target:reducing odor)
Ammonia
Sulphur
Temperature·humidity
Suction micro pump
Monitor/clean switch
Temperature range
Humidity range
Size
WeightData memory
USB (miniB)
Battery (built-in)
AC adaptor
Odor quality (reducing odor)
Intensity (reducing odor)
Heavy
Light
Ammonia
Sulphur
Temperature·humidity
List
Peak holdPresetUser
Measurement time
Recording medium
Zero calibration
Measurement method
Repeatability
Remote control
OptionEach measurement

Function
Heavy·lightAmmonia
Sulphur
Temperature・humidity sensor
For sample/clean air suction (850mL/min)
Automatic switchable micro valve

7200 measurement data (when memorized every second)
Connects to PC with USB
Charging type (Lithium-ion)
AC (IN:100 ～ 240V) -DC (OUT:9V) approx. 6W
Displays odor quality value (0 ～ 90)
Displays intensity value (0 ～ 5500)
Displays intensity of heavy sensor
Displays intensity of light sensor
Displays intensity of ammonia sensor
Displays intensity of sulphur sensor
Displays temperature and humidity
Displays measurement data list
Displays while keeping peak value of each measurement
Pre-installed data (Heavy,Middle,Light)
Transfer data created by user
Sets measurement time
Sets recording medium
Calibrates zero-point
Starts measurement automaticallyOdor quality・intensity value (under same conditions)
Measures via USB communication
Updates standard point at arbitrary timing
Updates standard point before each measurement

Data list display
mobileⅢ
integralⅢ
○
○
―
○
―
○
―
○
○
○
○
○
5 ～ 40℃
20 ～ 80%RH
128(W)×243(H)×60(D)mm
760g
2 hours
○
○
○
○
○
○
○
○
○
○
○
○
○
○
―
○
―
○
―
○
○
○
○
○
3 types
3 types―
1 typeSelectOptionSelectOptionManualManual/auto
―
○
±15%
±10%
―
○
○
○
―
○

25

定置形 可燃性ガス 検知警報器

爆発防止・漏洩検知・連続ばく露用
Detection
Principle

Principles and Features

Basic Circuit

Character of Output Signal

Gas To Be Measured

Galvanic Cell TypePOINT

Compensation
thermistor

Electrode

Indicator

OutputOutputOutputOutputOutputOutput● OxygenConsists of a positive electrode (noble metal) and its cover diaphragm, a negativeelectrode (base metal), electrolyte and a container.
Transmitted oxygen through the diaphragm reduced at the positive electrodesurface to ﬂow the current proportional to the oxygen concentration to measure
the oxygen concentration.
・Measures oxygen concentration in inert gas such as N2, CO2・Not affected from acid gas such as H2S, SO2
・Fast response at rising and falling・No power source required for detection

Gas Concentration [%]Gas Concentration [%]Gas
Concentration[%]
Gas Concentration
Concentration [%][%]Gas
Gas Concentration [%]Consists of a detecting element made of a coiled platinum wire covered withcatalyst and a comparison element sintered inactive substances. When thedetecting element is heated to an appropriate temperature and comes into
contact with combustible gas, the combustible gas molecule produces moreheat of combustion by the oxidization in air and electric resistance of the coiled
platinum wire is increased. The increase of electric resistance is proportional togas concentration and an electric voltage signal is taken out by means of thewheatstone bridge.
POINT

F1 F2
R1

VR

R2
Indicator

Gas Concentration [%]Gas Concentration [%]Gas
Concentration[%]
Gas Concentration
Concentration [%][%]Gas
Gas Concentration [%]E・Mainly reacts with combustible gases
・High presicion and superior repeatability
・Low inﬂuence from ambient temperature/humidity

Heat Wire Semiconductor Type

DetectingElement

The detection element is covered by metal oxide semiconductor on the coiled wireand heated at appropriate temperature. When combustible gas is adsorbed on thesemiconductor surface, a reaction occurs between the adsorbed gas molecular andthe semiconductor, and the electric conductivity of the semiconductor is changed. Ic=const.
The change amount of conductivity can be taken out as an electric resistancechange of the detection element and it is proportional to the gas concentration.
POINT

OutputOutputOutputOutputOutputOutputCatalytic Combustion TypeRd

OutputOutputOutputOutputOutputOutputR1

R2

・Capable of fast leak detection due to high sensitivity to combustible gases
・Small zero-drift and good stability against temperature and moisture(Japan patent No.3385248)

Gas Concentration [%]Gas Concentration [%]Gas
Concentration[%]
Gas Concentration
Concentration [%][%]Gas
Gas Concentration [%]Comparison
Element

Vout

Rr● Isobutane● Propane● Methane● Hydrogen● Alcohols● Organic solvents● Other combustible gases● Isobutane● Propane● Methane● Hydrogen● Alcohols● Organic solvents● Other combustible gases

Chronoamperometry TypeConsists of three electrodes; working electrode (W.E.), counter electrode (C.E.)
and reference electrode (R.E.), is immersed in acid electrolyte solution and kept
at an electrolyte cell. Each electrode is connected with the potentiostat circuit. V
When a gas passed through W.E. that constant electric potential against R.E.,
W.E. gets an electrochemical reaction at an electrode surface and an electrolytic
current i ﬂows. The electrolytic current is propotional to a gas concentration,
so the gas concentration can be achieved.

W.E

C.E

OutputOutputOutputOutputOutputOutputCurrent

R.E

Gas Concentration [%]Gas Concentration [%]Gas
Concentration[%]
Gas Concentration
Concentration [%][%]Gas
Gas Concentration [%]・Detects toxic gases in the air and/or inert gas such as N2
・No poisoning from silicon and/or sulphur compound
・High sensitivity enables to measure minute amounts of concentration
・High selectivity is suitable for detecting toxic gases
・ Low inﬂuence from ambient temperature

Non-Dispersive Infrared TypeAn infrared ray radiated from a light source passes through target gas inside thecell, then only the target gas is selected to wave length by BPF and supplied to thedetector. The density of the target gas inside the cell changes periodically with
the ﬂuid modulaton unit, so the absorption volume of infrared ray also changes.
The detector output amplifies the periodic change of the absorption volume only,
so the output rely on the gas concentration could be get. In case of zero gas, theabsorption of infrared ray is none and the absorption volume does not change, so
there is no output.

Cell

Pump

Target gas(Density)

Gas Concentration [%]Gas Concentration [%]Gas
Concentration[%]
Gas Concentration
Concentration [%][%]Gas
Gas Concentration [%]

BPF

Fluid
modulation
unit

・High accuracy and selectivity
POINT
・Disclosed detectors give less sensitivity loss factor from poisoning
・No zero drift in principle● Carbon monoxide● Nitric oxide● Hydrogen sulphide● Ammonia● Sulphur dioxide● Other specialty gases・
toxic gases

Light source

Solenoid valve

OutputOutputOutputOutputOutputOutputPOINT

Potention stat

● Carbon monoxide● Carbon dioxide● Methane● Propane● Alcohol● Other hydrocarbons

Detector

A detecting element is located in a sample gas, and a comparison element islocated in air or nitrogen in order to compare with the detecting element. Bothelements are heated appropriately and respond to thermal conductivity of thesample gas and air respectively. As each gas has a different thermal conductivity,
the electric resistance of the detecting element is changed if the sample gas
contains an objective gas.
POINT

26

・Capable of measuring up to 100vol%・Capable of detection without oxygen

Indicator

E
VR

R1

F1

R2

F2

OutputOutputOutputOutputOutputOutput

Thermal Conductivity Type

Gas Concentration [%]Gas Concentration [%]Gas
Concentration[%]
Gas Concentration
Concentration [%][%]Gas
Gas Concentration [%]● Carbon dioxide● Hydrogen● Propane● Methane● Other hydrocarbons

Explosion-proof Apparatus

International Standard
Japanese Standard<International Electrotechnical Commission (IEC) Standards> <Electrical Apparatus for Explosion Protection Standards>(2006)

2

定置形 検知部用 オプション部品(All KITAGAWA products are based on 2 types of
explosion-proof standards listed below.)

G4International Practices for Explosion-proof

Japananese Ministry of Health, Labour and Welfare(including former technicalstandards)( 旧技術的基準を含む)
国際整合防爆指針■ Example of explosion-proof protection symbols
Ex

ia

d

ⅡB+H2

T3

X

Annouancement
No.16/Explosion-proof(2006)
昭和 44
年労働省告示第16 号 / Guideline
防爆指針(2006)■ Example of symbols

i

d

2

G4

Explosion-proof protection

Explosion(based on IEC standards)(based on IE

Types of protection

Types ofTypes of protection(Intrinsically-safe apparatus
intended to use in hazardous area)(Intrinsicallyintended to(Intrinsically-safe apparatus)

Types of protection(Insrinsic safety)

Types of equipment protection
by flameproof

Types ofby flame(Catalytic combustion type sensor component)(Catalytic combustion type sensor component)(Catalytic c

Explosion class of explosive gas(Explosion class 2)Group of equipment for explosive atmospheres(Equipment intended for use in places with an explosive gas atmosphereother than mines, and Hydrogen added to classⅡB gas or vapour)Group of(Equipment
other than m

Ignition degree of explosive gas(Ignition temperature is above 135ºC and below 200ºC)

Temperature classes of equipment
for explosive atmospheres

Temperafor explo(Maximum surface temperature is 200ºC)(Maximum

Condition of usage

Condition(Oxygen monitors should not be used in a mixture of air and combustible
gases or vapour, and should be used for oxygen measurement only)■Identification of symbols
Item
SymbolExplosion-proof protection
ExdopTypes ofia
protectionibmnGrouping forⅡelectrical
ⅡA
apparatus
ⅡB
for explosive
atmospheres
ⅡC
Temperature classfor electricalapparatus for
explosive
atmospheres

T1
T2
T3
T4
T5
T6

Identification of symbol
Specific symbol for explosion-proof
Flameproof enclosures
Oil immersion
Pressurized enclosures
Intrinsic safety (intended for use in zone 0）
Intrinsic safety (intended for use in zone 1）
Encapsulation
Non-incendive
Equipment intended for use in surface industries
Applied for gases and vapours of group A
Applied for gases and vapours of group B
Applied for gases and vapours of group C
Maximum surface temperatures;
450ºC
300ºC
200ºC
135ºC
100ºC
85ºC

■Classification of typical gases into explosion groups
Temp. class
Group

ⅡA

ⅡB
ⅡC

T1

T2

T3

■Identification of symbols
Item
SymboldoType off
explosion
protectedeapparatusis12
Explosion
3aclasses of
3b
explosive gas
3c3nG1
Ignition
degree of
explosive gas

T4

T5

G5

Identification of symbol
Flameproof typeOil immersion typePressurized type
Increased safety type
Intrinsically-safe typeSpecial explosion-proof type
Gases or vapour of explosion class 1
Gases or vapour of explosion class 2
Water gases and hydrogen
Carbon disulphide
Acetylene
All explosion class 3 gases
Ignition temperature is;above 450ºC
above 300ºC and below 450ºC
above 200ºC and below 300ºC
above 135ºC and below 200ºC
above 100ºC and below 135ºC
above 85ºC and below 100ºC■Classification of typical explosive gases for the standard in Japan
Temp

T6

1

2
Carbondisulphide

G3
G4

Class

Acetic acid Acetic anhydride Gasoline Acetaldehyde
Acetonen-Butane
HexaneAmmonia
1-Butanol
Kerosine
BenzeneIsopentyl
Napthasa
EthaneacetateWhite spilit
Ethyl acetate
LP gasMethaneMethanolToluenePropaneEthanol
Ethyl ether
Ethyl methyl
Carbon monoxide Ethylene
ether
Ethylene oxide
Hydrogen
Acethylene
Water-gas

G2(Oxygen mogases or va

3

G1

G2

Acetic acid Acetic anhydride
Acetonen-ButaneAmmonia
1-Butanol
BenzeneEthanol
Carbon monoxide
Isopentyl
EthaneacetateEthyl acetate
MethaneMethanol
PropaneTolueneEthylene
Coal gas
Ethylene oxide
Hydrogen
Acetylene
Water-gas

G3

G4

Gasoline
HexaneAcetaldehyde
Ethyl ether

G5

Carbondisulphide

27

DISTRIBUTED BY:

MANUFACTURED BY:
KOMYO RIKAGAKU KOGYO K.K.
1-8-28 SHIMONOGE, TAKATSU-KU
KAWASAKI-CITY, KANAGAWA 213-0006, JAPANTel : +81(0)44-833-8911
Fax : +81(0)44-833-2672
URL http://www.komyokk.co.jp/english/
E-mail qa@komyokk.co.jp● Specifications are subject to change without any prior notice.

BK01001(E)F.18.09/1D

KOMYO RIKAGAKU KOGYO K.K.