The GDA 2628 Oxygen gas sensor is a further enhancement of the GDA 2528 Oxygen gas sensor that allows AC and DC operation. It has an electrochemical gas sensing unit which is temperature compensated and easily replaceable.

Designed, manufactured and supported locally in Australia.

The gas sensor element is on a pluggable lead to allow ease of replacement. The carbon monoxide gas sensor electronics are housed in a robust ABS sun tolerant plastic enclosure rated IP56; the sensor head and its electronics are housed in a metal enclosure giving it excellent RFI and EMC compatibility. The sensor head is fitted with a splash proof cover giving an IP53 rating. Provides the option of 4-20 mA, 0-10 V, and 0-5 V operation. The additional voltage o/p can be used on BMS systems that use voltage inputs as opposed to current input

  • 0-25% Vol Range (Other ranges on request)
  • 4-20 mA, 0-5 V or 0-10 V o/p
  • 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

Important Note: Acid gases such as CO₂ and SO₂ will be absorbed by the electrolyte and tend to increase the flux of oxygen to the electrode. This gives an enhanced oxygen signal of approximately 0.3% of signal per 1% CO₂. GDA oxygen sensors are not suitable for continuous operation in concentrations of CO₂ above 25%.

Interference: Long lines of voltage signal cables may act as an antenna causing interference and noise leading to false readings and reduced accuracy.

Made in Australia and Supported in Australia

Related Products

Sewage Treatment Plant Monitoring

The presence of Hydrogen Sulphide  can be detected by using the Gas Detection Australia GDA 2529 gas sensor to detect leaks of Hydrogen Sulphide  and evoke deodorisation plant. The SI-100C gas sensor can be used to monitor for leaks of LEL levels of methane gas. In digester applications Carbon dioxide can be detected using the GDA 4350  

Designed, Manufactured and Supported in Australia.

Specification NameSpecification Value
Detectable GasesOxygen (O₂)
Detectable Gas Ranges0-25% vol
Power Requirements+24 VDC (Optional +24 VAC)
Output Types4-20 mA, 0-5 V, 0-10 V (user configurable)
Power Consumption0.25W in 3 wire mode
Output SpecificationsMax loop impedance 680 Ω @ 24 VDC
Connection4 pin plug / socket
Wiring2 core or 3 core dependent on o/p ( with overall screen)
Operating Temperature-10 - 40°C
Operating Humidity5% to 95% RH peak non condensing
Accuracy of Reading± 3% of full scale reading in standard operating environment
Warm Up Time30 seconds
Response TimeT90 = 45 seconds at SATP
Zero Drift< 0.1% / 30 days
Calibration Drift< 0.25% / 30 days at SATP
Sensor TechnologyElectrochemical Cell
Calibration RequirementEvery year with 6 monthly functional tests if sensor operated in standard operating environment
Typical Operating Life18 - 24 Months before requiring sensor head replacement in standard operating environment
Warranty12 months from date of dispatch
Dimensions155 x 130 x 70 mm (H, W, D)
Enclosure MaterialABS plastic & Brass C385
Enclosure RatingIP56 with sensor element IP53
Cable EntryUser provided

GDA 2628 Oxygen (O₂) Gas Sensor

  • GDA 2628 Fixed Gas Sensor Trasmiter & Module
  • User Manual
  • Australian Factory Certificate of Calibration
Part Number Range Replacment Sensor Module
2628-001 0-25% Vol 2628-002



Part Number Image Description
GC01-001 Gassing Cap with 500mm Length vinyl tubing
2500-005 4 x 10-24 x 3/4 (T25) Tamper Proof Security Machine Screws for GDA 2500/2600 Series Lid. incl. Wrench Key