Intrinsically Safe Gas Detectors FGD3 Series

Hydrogen Sulphide Gas Detector

Intrinsically Safe Hydrogen Sulphide Gas Detector


  • Standard range 0-50ppm, other ranges available up to 0-200ppm Hydrogen Sulphide, H2S.
  • Suitable for use in Zones 0, 1 and 2 hazardous areas.
  • Two wire connection.
  • 8 to 24 volt dc operation.
  • Industry standard 4 to 20mA output.
  • Digital display.
  • Single operator calibration.


The FGD 3 Hydrogen Sulphide Gas Detector uses electrochemical sensor technology to detect the level of Hydrogen Sulphide in the atmosphere in various ranges up to 200ppm. The detectors use the industry standard 4-20mA current loop both to power the detector and to convey the gas levels detected to a control unit such as the Status Scientific Controls MCU Series. This means that under zero gas conditions 4mA is drawn from the supply, and under full scale gas conditions 20mA is drawn from the supply. The current varies linearly for gas levels between zero and full scale. The detector head uses a two-wire connection.

FGD3 Series Data Sheet

Hazardous Area Certification Data

Certificate Number - BAS 01ATEX2300
II 2 G Ex ia IIC T4 Gb (-20 deg. C <Ta< +60 deg. C)
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FGD3 Hydrogen Sulphide Detectors - Order Codes

Stock No. Description
SS402 FGD3 Hydrogen Sulphide Gas Detector - (4-20mA Output) - Range 0-50ppm H2S

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