GW-3 (HS)

Gas Detectors

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Manufacturer: Riken Keiki

H2S portable gas Detector 


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  • Among world's smallest and lightest
  • Three-year sensor warranty
  • Newly developed R sensor installed for improved performance
Category Portable Gas Detector
Type Single Gas
Detection gas Hydrogen sulfide
Principle of detection Electrochemical type
Detection range 0.0 to 100.0 ppm
(0.0 to 200.0 ppm)
Alarm setpoints
  • 1st 5.0 ppm
  • 2nd 30.0 ppm
  • 3rd 100.0 ppm
  • TWA 1 ppm
  • STEL 5 ppm
Response time within 30 seconds (Typical: 18 seconds)
Alarm type Gas alarms: Three-step alarms, STEL alarm, TWA alarm, OVER alarm
Fault alarms: Sensor connection/disconnection, low battery level, calibration failure, clock abnormality, system abnormality
Explosion protected construction Intrinsically safe
Explosion-proof class ATEX: II1G Ex ia IIC T4 Ga/IECEx: Ex ia IIC T4 Ga/INMETRO: Ex ia IIC T4 Ga/Japan Ex: Ex ia IIC T4 Ga
IP rating Equivalent to IP66/68 (2 m, 1 h)
Approvals ATEX, IECEx, INMETRO, Japan Ex, CE Marking
Power source CR2450 coin-type lithium battery
Battery life Approx. 4,000 hours
Dimensions 63 mm (W) × 42 mm (H) × 22 mm (D) (excluding projections)
Weight Approx. 45g
Operating temperature range -20℃ to +60℃ (no sudden changes)
Operating humidity range 0 to 95%RH (no condensation)


Via Magenta, 77/16A
20017 Rho (MI) - Italy
Phone +39 02 3340 0846
VAT: IT04126380155
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Via Magenta, 77/16A
Rho 20017, Italy
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+39 02 3340 0846

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