The GDA 4350 Pump is designed to be used where diffusion sensors are impractical due to environmental or wash down requirements. An advanced 3 wire Non Dispersive Infra red (NDIR) Carbon Dioxide sensor giving a 4-20 mA, 0-20 mA, 0-5 V or 0-10 V o/p over the range of the sensor. Low Temperature version available.

Designed, manufactured and supported locally in Australia.

Housed in an ABS plastic case with an aperture for the gas path. It uses laser LED to give reliable performance. Calibration for non critical safety applications is every 3 years. The low temperature version (suffix LT) operate from - 25°C to 30°C.

  • 24 VDC, 3 Wire Operation
  • 4-20 mA, 0-20 mA, 0-5 V or 0-10 V o/p linear over range of sensor
  • Ultra low cross sensitivity to other gas
  • Temperature and humidity compensated
  • Multiple ranges
  • Factory calibrated
  • Low drift

Made in Australia and Supported in Australia

Related Products

Air Conditioning Monitoring

Air conditioning gas detection systems are used in a number of ways. In air conditioning plant rooms  Gas Detection Australia  has  gas sensors and gas detectors  for Ammonia , Propane, CO2 and  R134a, R123, R125, R404, R407c  R410a etc. In enclosed laboratories classrooms and workspaces. The Gas Detection Australia  range of flush mounted Air Conditioning gas sensors for Carbon Dioxide GDA 4360 are used by the HVAC industry  to control fresh air input into rooms and modulate supply. In the case of VRF systems needing room air conditioning gas detection  HVAC industry uses the flush mounted GDA 3160 which are unobtrusive and used to detect low  levels of R134a, R123, R404, R407c, R410 etc.

Meets the requirements of AS/NZS 5149.3:2016

Designed, Manufactured and Supported in Australia.

Cellar Gas Detection

The Gas Detection Australia uses the latest patented laser source technology to provide reliable accurate and cost effective solutions for Carbon Dioxide gas detection in cellar gas detection applications. The Carbon dioxide cellar gas detection system comprises of a remote  carbon dioxide gas detector / gas sensor, an external  control unit + power supply (to view the gas levels and alarms before entry ) and a audio visual sounder/ flasher that  will activate on alarm. Gas Detection Australia offers a range of solutions to meet individual site requirements for carbon dioxide  cellar gas detection systems  and oxygen  cellar gas detection  when using nitrogen for  pre-mix drinks

Meets all the requirements of AS5034-2005

Designed, Manufactured and Supported in Australia.

Lift Shaft Wells

Oxygen sensors are often placed in lift shaft wells to measure the atmosphere prior to entry. Problems arise due to the pressure changes in the left shaft well due to the air movements associated with the lift.resulting in false alarms . There is also an issue associated with safe work permits for access into the lift shaft area when the oxygen sensor requires calibration or replacement. The GDA 4500 system uses a vacuum pump (dc brushless) , a flow fail mechanism and a sensor  to extract the gas via a 6mm ID tubing. The Nylon tube is fitted with a filter element to provide dust filtering and prevent mycological build up in the sampling line.

Designed, Manufactured and Supported in Australia.

Refrigerant Plant Room Monitoring

Refrigerant gases are used to provide a means of cooling the evaporators in freezers and air conditioning for plant rooms and chiller plants. Historically CFC refrigerant gases such as R11, R12 and R22 have been used. CFC’s are ozone depleting gases and are now being phased out and replaced by ozone friendly gases such as R134, R407 and R410.

Why is there a need to detect them?

  • All these gases are toxic at relatively low levels. Prolonged exposure to these gases is hazardous and results in serious health risks. GDA sensors can detect these gases at very low levels, in order to prevent this hazard becoming a danger to life.
  • Air conditioning systems and chillers that are leaking their refrigerant gases are not performing to maximum efficiency. The major use of refrigerant gases is in the re charging of these systems. If leaks are detected early the problem can be alleviated much quicker, saving costs on replacement gas, co maintenance and protecting the environment.
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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 for R22, R123, R134a, R404, R407, R410, R514a, R1234yf and many others.

Meets the requirements of AS/NZS 5149.3:2016 and ISO 5149-3:2014

Designed, Manufactured and Supported in Australia.

Confined Space Gas Monitors

May confined spaces have a high threat of poisonous gases and man-down incidents. Responders or workers need to be protected by ongoing, continuous atmospheric monitoring. SENKO Gas Detection Australia's portable gas detectors are built to protect you and your staff and from comply with Australia regulations. With IP 67 Waterproof and IEC Ex Approved Explosion proof casing, data logging, simple calibration and set up. The SENKO Gas Detection Australia Line of Portables are ready to go when you are.

Cold Room Monitoring

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

Designed, Manufactured and Supported in Australia.

Laboratory and Classroom Monitoring

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Designed, Manufactured and Supported in Australia.

Specification NameSpecification Value
Detectable GasesCarbon Dioxide (CO₂)
Detectable Gas Ranges0-2000 ppm;10000 ppm; 5% vol; 20% vol; 100% vol
Power Requirements24 VDC
Output Types4-20 mA, 0-20 mA, 0-5 V or 0-10 V
Power Consumption<30 mA @ 24 VDC
Output Specificationsmax loop Impedance 800R @ 24 VDC
Wiring3-wire (0.75mm²) with overall screen
Operating Temperature5°C to +45°C (LT version to -20°C to +45°C)
Operating Humidity5% to 95% RH peak non condensing
Operating Pressure900 - 1100 mbar
Accuracy of Reading± 2% FSD ±0.5% reading @SATP
Warm Up Time<30 sec
Response Time<20 sec
Sensor TechnologyNon Dispersive Infra-Red (NDIR)
Calibration RequirementEvery 3 years with 6 monthly functional tests if senor operated at SATP
Warranty12 months from date of dispatch
Dimensions115 x 130 x 71 mm (L, W, D) Mounting holes 105 x 75 mm
Enclosure MaterialABS plastic
Cable EntryUser Provided
Product Description
4350P-01 0-2000 ppm Carbon Dioxide detector
4350P-01-LT 0-2000 ppm Carbon Dioxide detector Low Temperature -25°C to 45°C
4350P-02 0-10000 ppm (1%vol) Carbon Dioxide detector
4350P-02-LT 0-10000 ppm (1%vol) Carbon Dioxide detector Low Temperature -25°C to 45°C
4350P-03 0-5%vol Carbon Dioxide detector
4350P-03-LT  0-5%vol Carbon Dioxide detector Low Temperature -25°C to 45°C
4350P-04 0-20%vol Carbon Dioxide detector
4350P-04-LT 0-20%vol Carbon Dioxide detector Low Temperature -25°C to 45°C
4350P-06 0-100%vol Carbon Dioxide detector
4350P-06-LT 0-100%vol Carbon Dioxide detector Low Temperature -25°C to 45°C


CALGAS : Calibration Gas

The highlights of the new Portagreen range speak for themselves. They are refillable, compact, made from the highest quality, tested for the lowest failure rate and longest shelf life and totally recyclable.  The Portagreen range of calibration gas cylinders enable businesses to reduce their carbon footprint and cut costs while demonstrating a commitment to the environment.