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Refrigerant leak detection system

Halogenated hydrocarbons (CFC and HCFC categories), alkenes (HFO) and most of refrigerant gases, also known as freons, are regulated under a specific regulation that limits – or prohibits – their use with obligation to implement a refrigerant leak detection system with several refrigerant gas detectors …

Freon gas refrigerant leak detection system for industrial refrigerant gas monitoring


    Based on their properties, Freons are classified into several categories. Depending on the need specificities, some categories shall be preferred:

    . Organic compounds: water, carbon dioxide

    . Hydrocarbons : butane, pentane, propane, propylene…

    . CFC’s (chlorofluorocarbons): R11, R12, R113, R115, R502

    . HCFC’s (hydrochlorofluorocarbons): R21, R22, R123, R124, R401a, R402a, R408a, R409a

    . HFC’s (hydrofluorocarbons): R32, R125, R134a, R15a, R143a, R152a, R404a, R407a, R410a, R507

    . Unclassifiable refrigerant gases: R630, R631, R12b1, R12b1 and so on

    Refrigerant gases are rarely called under their international denomination due to their complex names. An R-ABCDE abbreviation was chosen – R meaning refrigerant.

    . A: number of double bonds – doesn’t appear if 0

    . B: number of carbon atoms minus one  (C-1) – doesn’t appear if 0

    . C: number of hydrogen atoms plus one (H+1)

    . D: number of fluorine atoms (F)

    . E: used to determine isomers (similar raw formula but not under its half-developed form)

    For example, R134 is a freon composed of 2 carbon atoms, 2 hydrogen atoms and 4 fluorine atoms.


      Apart from some volatile organic compounds or hydrocarbons, refrigerant gases are usually not harmful: they are non flammable, non corrosive and non toxic. However, they replace breathable air particularly in poorly ventilated or confined spaces.

      Besides potential risks of anoxia, some freons have anesthetic properties which make them potentially hazardous. Because industrial refrigeration gases can be dangerous, their use requires the implementation of a refrigerant leak detection system.

    • Refrigerant leak detection system (industrial refrigerant gas detector)

      Halogenated hydrocarbons belong to the CFC and the HCFC categories. They are regulated under a specific regulation: prohibition or limitation of use with a required implementation of a refrigerant leak monitoring system. Other refrigerant leaks are regulated under chemical products regulations but it is highly recommended to use an industrial refrigeration gas detection system as well…

      Freons are heavier than air. They tend to remain stagnant and progressively replace oxygen. For optimal efficiency of your refrigerant leak detection system, refrigerant gas transmitters should be placed under the cooling unit and linked to a gas detection controller. In case of leakage, the controller unit will shut down the power supply of the cooling installation.

      ⇒See refrigerants strandards and regulations

      ⇒See HVAC refrigerant leak detection devices

    Equipment for refrigerant leak detection sytem & freon gas detectors :

    Gas detector – refrigerant gas leak – OLCT10 Freon

    OLCT10-Freons refrigerant gas leak detector with 4-20 mA linear output for refrigerant application in classified area.

    • Fixed gas detector OLCT10
    • Detection of R11, R12, R22, R23, R32, R123, R134A, R141B, R143A, R227, R404A, R410A, R407C, R408A, R507, FX56
    • Power supply: 15 to 30 VDC – 4-20 mA linear output
    • Robust, compact and easy to use
    • Approval: ATEX II 3 G / EEx nA IIC T4 – Electromagnetic compatibility according to EN-50270
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    SIL 2 approved ATEX gas detector to detect the combustible gases (IR or catalytic), CO2 (IR), toxic gases (electrochemical), solvents or freons (semiconductor) and asphyxiating gases (oxygen deficiency).

    • Fixed gas detector OLCT100
    • Detection of hydrocarbons, solvents, toxic gases, freons, VOC, CO2
    • Housing made of aluminium with epoxy paint (optional 316L Stainless Steel version)
    • Outputs: OLC100: Wheatstone bridge – OLCT100: 4-20 mA linear
    • Power supply: 15.5 to 32 VDC
    • ATEX & SIL 2 approved for catalytic and infrared versions
    • Additional information
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    Aspirated gas detector – IR148

    The IR148 detector is an aspirated gas detection system. This gas detection monitor features from 1 to 8 aspiration channels to detect presence of hazardous gases.

    • Fixed gas detector IR148
    • Infrared technology gas detection
    • Measuring range from 0 to 1,000 ppm
    • Response time update every 7 seconds
    • 3 alarm levels to activate sirens and alarm signals
    • Available in both fixed or portable versions
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    The RD99 refrigerant gas leak detector can detect almost any refrigerant gas: CFC (R11, R12, R13), HCFC (R22, R500, R502), HCF (R134a, R123, R125, R23), R404A R407C R410A.

    • Portable gas detector RD99
    • Detection of refrigerant gas micro-leaks including R11, R12, R13, R22, R502, R500, R134a, R123, R125, R23, R404A, R407C, R410a
    • Detector response time below a second
    • Easy operation from first use
    • Complies with EN 14624/ EN 35422
    • Additional information
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    Freon, solvent, voc gas detector – CSC300

    4-200 mA detector/transmitter with semiconductor technology to detect refrigerant gas leak (Freon) in unclassified zones.

    • Fixed gas detector CSC300
    • Freon gas detector (R134A, R11, R12, R22, R23, R141, R142B, R404), solvents and VOC (volatile organic compounds)
    • Power supply: 15 to 32 VCC – 4-20 mA linear output
    • Settings: Local via potentiometers zero and sensitivity
    • IP66 protection
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