The GDS 20J Safe Area Detector

The GDS 20J is a single gas safe area detector that meets the requirements for economic and reliable monitoring of gas levels in a wide range of environments and applications. The 20J comes in a industrial polycarbonate enclosure without display and has been designed as an economical solution for most applications.

The GDS 20J has been designed with features that will provide an effective response to the detection of gas hazards in a wide range of industrial enviroments from boiler plant rooms, swimming pools, water treatment works, HVAC control systems, manufacturing and process plants.


  • Economical Option
  • Safe Area Detector
  • Suitable for Oxygen, Toxic Gases and Flammable Gases
  • Output 4-20mA
  • Robust and Weather Proof
  • Electrochemical, Semiconductor and Infrared option

Available Gases

  • Oxygen (O2), range 0-25%
  • Carbon Monoxide (CO), range 0-250 ppm
  • Hydrogen Sulphide (H2S), 0-50 ppm
  • Nitrogen Dioxide (NO2), range 0-10 ppm
  • Hydrogen (H2), range 0-2,000 ppm
  • Chlorine (CL2), range 0-10 ppm
  • Hydrogen Cyanide (HCN), range 0-25 ppm
  • Nitrogen Oxide (NO), range 0-100 ppm
  • Hydrogen Chloride (HCl), range 0-10 ppm
  • Ammonia (NH3), range 0-100 ppm
  • Ozone (O3), range 0-2 ppm
  • Ethylene Oxide (ETO), range 0-25 ppm
  • Flammable (LEL), range 0-100%