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For monitoring:

Carbon dioxide, Hydrocarbons, Methane and jet fuel vapours


Key Features

  • Single sensor
  • Low power consumption
  • Dual temperature compensated pyroelectric infrared detectors
  • Fast response with accurate low-level gas detection
  • Long sensor life
  • Water / dust tight / corrosion resistant polycarbonate enclosure
  • Linear analog (4 - 20 mA) output



The AST-I series of analog transmitters are high quality, industrial, dual beam, referenced transmitters with miniature infrared sensors, analog output and water / dust tight, corrosion resistant, non-metallic enclosures..

The AST-ICD detects carbon dioxide (CO2) with a choice of one of three different ranges.
The AST-IHC detects hydrocarbons, methane (CH4) and jet fuel vapours.

Care should be taken to not spray the sensor head in wet environments. The sensor vent opening has a microporous PTFE filter attached which provides splash protection only, it is not designed to provide protection from the application of pressurized water.

AST-ICD & AST-IHC Industrial Infrared Transmitters

  • Target Gas


    Gas Sensors

    Carbon dioxide (CO2), Hydrocarbons, Methane (CH4), jet fuel vapours




    Water / dust tight, NEMA 4, IP66, corrosion


    Resistant ABS with hinged, secure door


    Copper coated interior to reduce RF interference


    244 g (8.6 oz)


    165 x 156 x 92 mm / 6.5 x 6.125 x 3.625 inches

    User Interface



    4 digit, 7 segment LCD


    4 internal push buttons for servicing




    Linear 4 - 20 mA analog (10 bit resolution with current limit)

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