Gas Detectors

Gas detection is an important part of home safety and an essential part of commercial and industrial safety systems. Gas detectors are also known as gas analysers, gas meters or gas leak detectors, but they all have the same main function of detection of any hazardous gas leaks, oxygen depletion or the presence of emissions (toxic or flammable gases) are found.

Why would you need a gas detector?

A gas detection unit provides you with peace of mind and real-time 24/7 monitoring. They are available as handheld portable gas detectors or can be fixed or mounted to walls and ceilings.

How do they work?

There is a sensor inside the detector that will measure and monitor the concentration of certain hazardous gases that are in the air, and if gases are detected above a certain level which the sensor is set to an alarm will be triggered for evacuation. The alarms can be audible, visual or both, to ensure that all individuals can be alerted for evacuation. The gas detector could also send a signal to the building operations department in industrial/commercial buildings so people are aware of the danger even if they are not in the affected area.

What do they detect?

Gas detectors are categorized by the type of gas they detect; however, some are also multi gas detectors. Within this broad range, they are further defined by the technology they use:

  • Catalytic and infrared sensors detect combustible or flammable gases
  • Electrochemical and metal oxide semiconductor technologies generally detect toxic gases
  • Some common gases that can be detected are:

  • Carbon Monoxide
  • Chlorine
  • Carbon Dioxide
  • Ammonia Hydrogen Sulphide
  • Methane
  • Nitrogen Dioxide
  • Butane Gas
  • Natural Gas
  • How do I maintain my gas detector?

    Most gas detectors are battery operated for safety reasons, so it is important to perform regular checks on battery life and complete maintenance checks, the same way you would with a fire alarm.

    Are there any certifications to be aware of?

    Some gas detectors will offer ATEX certification (Atmospheres Explosibles) which is an EU-regulated standard designed to ensure the safety of equipment or products being used in potentially explosive environments.


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    Description Price Gases Detected Accuracy Calibrated Response Time Application ATEX Approval Meter Type Display Type Audible Alarm Visual Alarm Power Source Battery Type Battery Life Dimensions
    RS Stock No. 123-8775
    BrandRS PRO
    £215.00
    Each
    Units
    - - - - Conduit & Pipe Identification, Door & Window Leaks - Handheld LED Yes Yes Battery 9V - 70 x 28 x 255mm
    RS Stock No. 106-5305
    BrandRS PRO
    £120.00
    Each
    Units
    Carbon Monoxide ±5 % - 30 s Environmental - Handheld Backlit LCD - - Battery 4 x AAA 90 h 156 x 73 x 35mm
    RS Stock No. 174-6574
    BrandRS PRO
    £103.50
    Each
    Units
    Carbon Dioxide ±1 %, ±3 %, ±5 % - - Air Quality Control No Workstation Monitor LED No - Battery Rechargable NiMH - 100 x 48 x 110mm
    RS Stock No. 174-6575
    BrandRS PRO
    £132.48
    Each
    Units
    - ±1 %, ±3.5 %, ±5 % - - Air Quality Control No Workstation Monitor LCD Yes - Battery Rechargable NiMH 5 h 85 x 73 x 160mm
    RS Stock No. 144-5341
    BrandRS PRO
    £82.00
    Each
    Units
    Combustible - - 2 s Leak Detection No Handheld LCD Yes Yes Battery Li-Ion Polymer - -
    RS Stock No. 174-6576
    BrandRS PRO
    £328.34
    Each
    Units
    Carbon Dioxide, Carbon Monoxide ±0.5 %, ±2.5 %, ±5 % - - Environmental - - TFT LCD Yes - Battery Rechargable NiMH - 75 x 57 x 240mm
    RS Stock No. 144-5342
    BrandRS PRO
    £70.00
    Each
    Units
    Combustible - - 2 s Leak Detection No Handheld LED Yes Yes Battery Li-Ion Polymer - -
    RS Stock No. 708-7739
    Mfr. Part No.T3-AAZZZZZZ-A-001-Z
    BrandCrowcon
    £311.32
    Each
    Units
    Flammable - - - Industrial Environments - Personal LCD Yes Yes Battery Rechargeable Lithium-Ion 14 h 114 x 71 x 48mm
    RS Stock No. 710-0712
    Mfr. Part No.T3-AAZZZZZZ-A-001-Z
    BrandCrowcon
    £380.32
    Each
    Units
    Flammable - RSCAL - Industrial Environments - Personal LCD Yes Yes Battery Rechargeable Lithium-Ion 14 h 114 x 71 x 48mm
    RS Stock No. 708-7742
    Mfr. Part No.GS-AG-B-039-G
    BrandCrowcon
    £288.68
    Each
    Units
    Oxygen - - 10 s Hazardous Area Worker Protection - Personal LCD - Backlit Yes Yes Battery Non rechargeable Lithium 2 yr 90 x 48 x 24mm
    RS Stock No. 710-0731
    Mfr. Part No.GS-AX-B-001-G
    BrandCrowcon
    £357.68
    Each
    Units
    Oxygen - RSCAL 10 s Hazardous Area Worker Protection - Personal LCD - Backlit Yes Yes Battery Non rechargeable Lithium 2 yr 90 x 48 x 24mm
    RS Stock No. 910-7848
    Mfr. Part No.0632 3173
    BrandTesto
    £131.21
    Each
    Units
    Carbon Monoxide ±10 % - 40 s Boiler Service, Home Inspections, Weatherization Audits - Handheld LCD - Backlit Yes Yes Battery AAA Micro 150 h -
    RS Stock No. 390-0874
    Mfr. Part No.SF340F
    £92.14
    Each
    Units
    Carbon Monoxide - - - Domestic Environments - Wall Mounted - Yes Yes Battery 9V - 170 x 110 x 65mm
    RS Stock No. 708-7748
    Mfr. Part No.T3-AGAAAIAH-A-001-Z
    BrandCrowcon
    £475.47
    Each
    Units
    Carbon Monoxide, Flammable, Hydrogen Sulphide, Oxygen - - 10 (Oxygen) s, 20 (Flammable) s, 30 (Toxic Gas) s - - Personal LCD - Backlit Yes Yes Battery Rechargeable Lithium-Ion 16 h 114 x 71 x 48mm
    RS Stock No. 710-0722
    Mfr. Part No.T3-AGAAAIAH-A-001-Z
    BrandCrowcon
    £544.47
    Each
    Units
    Carbon Monoxide, Flammable, Hydrogen Sulphide, Oxygen - RSCAL 10 (Oxygen) s, 20 (Flammable) s, 30 (Toxic Gas) s - - Personal LCD - Backlit Yes Yes Battery Rechargeable Lithium-Ion 16 h 114 x 71 x 48mm
    RS Stock No. 327-1722
    Mfr. Part No.RD99/RS
    BrandKane
    £110.78
    Each
    Units
    Refrigerants - - 1 s Refrigeration - - LED Yes Yes Battery 9V 8 h 180 x 70 x 35mm
    RS Stock No. 122-5520
    Mfr. Part No.T4-HOCA/RS
    BrandCrowcon
    £446.04
    Each
    Units
    Carbon Monoxide, Hydrogen Sulphide, Oxygen - - - Industrial Yes Handheld LED Yes Yes Battery Rechargeable Li-ion 24 h 135 x 80 x 35mm
    RS Stock No. 913-2639
    Mfr. Part No.0563 3163
    BrandTesto
    £214.40
    Each
    Units
    438A, CFCs, HCFCs, HFCs, R134a, R-22, R-404A, R-410A, R-507 - - 20 s - - Handheld - Yes Yes Battery 2 x D 16 h 270 x 65 x 65mm
    RS Stock No. 225-375
    Mfr. Part No.0563 3164
    BrandTesto
    £349.00
    1 Lot of 1
    Lot(s)
    Refrigerants - - 1 s Leak Detection, Refrigeration - - - Yes Yes Battery Rechargeable NiMH 6 h 190 x 57 x 42mm
    RS Stock No. 390-0868
    Mfr. Part No.2102B0510
    £72.23
    Each
    Units
    Carbon Monoxide - - - Domestic Environments - Wall Mounted - Yes Yes Battery 9V - 170 x 110 x 65mm
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