F-Gas Detector is a high quality infrared fixed-point detector

General Details

Available for detecting a range of different refrigerant gases and also sulphur hexafluoride (SF6), the Crowcon F-Gas Detector can be connected to any control system that accepts an analogue signal.

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.


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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
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
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