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Crowcon F-Gas Detector

A high quality infrared fixed-point detector that delivers dependable detection of freon gases



Housed within an IP54 rugged enclosure, the F-Gas Detector is suitable for use in non-hazardous areas such as plant or switchgear rooms. 

In addition to protecting personnel from toxic gas risks, installing the F-Gas detector also helps to reduce the risk of leakage of powerful 'greenhouse gases' into the environment.


Accurate and reliable

  • Superior IR sensor technology - provides fast, stable and dependable performance with low maintenance and long life. Unlike cheaper semi-conductor type sensors the F-Gas detector is not affected by other types of gas or changes in temperature or humidity

Simple and versatile

  • Tri-coloured LED's - indicate the operating status of the detector, and in combination with the function keys, facilitate simple adjustments such as zero and calibration
  • Choice of output signals - the analogue output signal can be set as 4-20mA, 0-20mA, 0-2V, 0-5V or 0-10Vdc for compatibility with virtually any control system

Long life with low maintenance costs

  • No consumable parts - provides many years of service with no requirement to replace the sensor or any other components
  • Simple to test - requires a bi-annual gas check only. Re-calibration is only necessary if readings are out of range
  • IP54 rated enclosure - provides good protection from dust and water ingress in indoor environments

Safety and compliance

  • F-Gas regulations compatible - enables F-Gas suppliers and user to comply with the mandatory European F-Gas regulations
  • Rapid gas leak detection - provides an early warning that gas is leaking and thus maintains system efficiency and reduces expensive gas replacement costs
  • Environmental protection - helps to reduce the risk of leakage of powerful 'greenhouse gases' into the environment

Contact [email protected] for more information.




Size 151 x 80 x 60mm (5.9 x 3.1 x 2.4ins)
(Total size with cable gland: 151mm x 102mm x 60mm)
Weight 0.25kg (8.8oz)
Ingress protection IP54
Measuring principle Non-dispersive infrared (NDIR)
Range 0-1000 ppm
Resolution 1ppm 
Power 12-28Vdc
Analogue output 4-20mA current source
(can be set to 0-20mA, 0-2V, 0-5V or 0-10V)
Operating temperature -20°C to +40°C
Humidity 10 to 95% RH non-condensing
Repeatability +/- 1% FSD
Linearity +/- 2% FSD
Start up time <120 seconds
Response time 30 seconds approx
Pressure 800-1200mBar
Approvals EMC: EN5027


Refrigerent Gas options

Pure fluids

Fluids Formula Name Measuring Range
HCFC 22 (R22) CHCIF2 Chlorodifluoromethane 1000ppm
HCFC 123 (R123) CHCI2CF3 2,2-Dichloro-1,1,1-trifluoroethane 1000ppm
HFC 125 (R125) C2HF5 Pentafluoroethane 1000ppm
HFC 134a (R134a) CH2FCF3 1,1,1,2-Tetrafluoroethane 1000ppm


Blended fluids used in refrigeration/air conditioning market:

Refrigerant Components Measuring Range
R404a R143a/125/134a 1000ppm
R407a R32/125/134a 1000ppm
R407c R32/125/134a 1000ppm
R410a R32/125 1000ppm
R507 R143a/125 1000ppm








Speciality fluid used for vehicle refrigeration:

Fluid Formula Name Measuring range
R1234yf CH2=CFCF3 Tetrafluropropene 1000ppm




Insulating gas:

FGas Name Measuring range
SF6 Sulphur hexaflouride 1000ppm


Below is a small selection of the accessories available for the Crowcon Crowcon F-Gas Detector. For a full list please call 01235 557700 or Contact Us.

Calibration adaptor

Enables calibration gas to be applied to the sensor

Calibration gas and regulators

Freon gases and SF6 are available to enable sensor checking and calibration.

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