Fixed explosion-proof hydrogen sulfide analyzer h2s gas detector Baruch h2s gas leak detector alarm

Fixed hydrogen Sulfide (H2S) gas detector is used to monitor the H2S concentration with measuring range from 0 to 50/100/200 ppm in different kinds of environments or pipeline and alarm with sound and light, to safeguard the organic life.


  • Adopting high precision sensor for accurate gas leak detection.
  • Equipped with 3-wire system 4-20mA analog output, relay output, RS485 output (optional).
  • Compatible with various controlled alarms, PLC, DCS and other control system, and can be remote monitored.
  • Explosion-proof design, fast, reliable and stable.
  • Infrared ray controller can remote control the alarm point settings, zero calibration, and address modification.
  • Two-stage alarm with sound and light, and the alarm point is settable.
  • With self-calibration function, and three standard keys will be used to realize on-site maintenance.
  • Can output one or two on-off signals, can drive ventilator, solenoid valve or other external devices.
gas detectors


Detection PrincipleElectrochemistry
GasHydrogen Sulfide (H2S)
Range (Optional)0 to 50 ppm, 0 to 100 ppm, 0 to 200 ppm
Resolution0.01ppm, 0.1ppm or 1ppm (related to the selected range)
Accuracy≤±3% F.S.
Responce Time≤10s
Recovery Time≤10s
Linearity Error≤±1%
Zero Shift≤±1% (F.S./year)
Signal Output (Optional) Note4-20mA, or RS485 (transfer card included); Relay output: one group of relay output (1NO+1NC, 24V 100mA) for one alarm (default), or two groups of relay output (2NO+2NC, 24V 100mA) for high/low alarm (optional).
AlarmsSound, light
DisplayHigh light nixie tube display
InstallationWall-mounted, piping type, flow-type (according to the detected environment)
ConnectionG1/2 male thread explosion-proof flexible pipe
Operating Time24h
Explosion-proof GradeEx d llC T6
Protection GradeIP65
CertificationCE, ATEX
Working Voltage12-36V DC
Case MaterialDie-casting aluminum housing
Operating Temperature-20℃~50℃
Operating Humidity0~95%RH (non-condensing)
AccessoriesPower adapter: Input 100-240VAC 50/60Hz, Output 24VDC 2A (Optional USA plug & Europe plug)

Note: The output signal 4-20mA and RS485 CANNOT be used at the same time.
Fixed Gas Detector Dimension (Unit: mm)

* some common gases and the measure ranges are listed in the above table. For more information, please feel free to contact us.

Tips: Installation of Fixed Hydrogen Sulfide (H2S) Detector

Fixed hydrogen sulfide (H2S) detector shall be installed in the areas which are easy to release and gather the hydrogen sulfide gas, such as the drilling site, downhole operation site, gathering station, natural gas evolution field, water treatment station and refinery area.

The mounting site of fixed-type H2S detector should be determined by on-site facilities, processes, and the diffusion and gathering of hydrogen sulfide gas.

The fixed hydrogen sulfide (H2S) detector should be installed below the release source, and it shall be within 2m outside and within 1m inside. Moreover, the detector is better to be installed at 0.5-0.6m away from the gas release source. The installation height shall be 0.3-0.6m higher than the ground or floor. If the detector is installed lower, it’s easy to be affected by the rain drops, which may damage the detector.

If possible, please select the gas detectors with concentration display and acousto-optic alarm. The operators can observe the existence of hydrogen sulfide gas on site without returning to the duty room to see the alarm controller. It is finally better to protect them.