The GDA 2526 Ammonia gas sensor is a 2 wire 4-20 mA Loop Powered device. It has an electrochemical sensing unit which is temperature compensated and easily replaceable.

Designed, manufactured and supported locally in Australia.

The sensor element is on a pluggable lead allow ease of replacement. The ammonia gas sensor electronics are housed in a robust ABS sun tolerant plastic enclosure rated IP65; The sensor head is fitted with a splash proof cover giving an IP62 rating.

  • Available in 0-100 ppm, 0-300 ppm and other ranges on request.
  • 4-20 mA o/p (For Voltage Output see the GDA 2626)
  • Low cost replaceable gas sensor element
  • Easy to install
  • Easy to calibrate (only gas and multimeter required)
  • ABS sun tolerant IP66 housing (sensor element IP62)
  • Australian Factory Certificate of Calibration

Made in Australia and Supported in Australia

Refrigerant Gas: Plant Rooms & Offices

Gas Detection Australia has a range of ultra-low level refrigerant gas leak detection systems specifically developed to prevent the expensive results of refrigerant gas leaks.. R22; R123; R134, R407; R410; Ammonia, Carbon Dioxide; Propane



Food Processing

Purgative gases such as Chlorine and Sulphur Dioxide present OHS requirements for workspace monitoring. Ammonia is often used as a refrigerant gas and can present OHS requirements for monitoring. Carbon Dioxide used in food packaging and stored on site needs to be monitored.

Cold Rooms

The use of Carbon Dioxide gas detectors / gas sensors or Nitrogen gas detectors / gas sensors in cold rooms can result in asphyxiation if the levels get too high . Work place health and safety places a requirement for monitoring these gases


Specification NameSpecification Value
Detectable GasesAmmonia (NH₃)
Detectable Gas Ranges0-100 ppm
Power Requirements+24 VDC
Output Types4-20 mA Loop Powered
Power Consumption<25 mA @ 24VDC
Output SpecificationsMax loop impedance 1 kΩ @ 24 VDC
Connection3 pin plug connector
Wiring2 core 18 AWG with overall screen
Operating Temperature-10°C to 40°C
Operating Humidity15% to 90% RH peak non condensing
Accuracy of Reading0.5% of reading
Warm Up Time30 seconds
Response TimeT90 = 45 seconds at STP
Zero Drift< 0.1% / 30 days
Calibration Drift< 025% / 30 days at STP
Sensor TechnologyElectrochemical Cell
Calibration RequirementAnnually if senor operated at STP
Dimensions122 x 85 x 62 mm (H, W, D)
Enclosure MaterialABS Plastic
Enclosure RatingIP65 with sensor element IP62
Cable Entry2 x M20 top entry
Product Description
2526-001 0-100 ppm Ammonia gas sensor and transmitter
2526-002 Replacement sensor module Ammonia 0-100 ppm
2526-003 0-300 ppm Ammonia gas sensor and transmitter
2526-004 Replacement sensor module Ammonia 0-300 ppm