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 0-25 %VOL
Carbon Monoxide CO 0-250 ppm
Hydrogen Sulphide H2S 0-50 ppm
Sulphur Dioxide SO2 0-10 ppm
Nitrogen Dioxide NO2 0-10 ppm
Hydrogen H2 0-2,000 ppm
Chlorine CL2 0-10 ppm
Hydrogen Cyanide HCN 0-25 ppm
Nitrogen Monoxide NO 0-100 ppm
Hydrogen Chloride HCL 0-10 ppm
Ammonia NH3 0-100 ppm
Ozone O3 0-2 ppm
Ethylene Oxide ETO 0-25 ppm
Flammable LEL 0-100 %LEL