An explosive gas leak detector is a device used to detect explosive gas leaks in enclosed spaces. Typically, a local alarm will be triggered, and optionally a remote alarm may also be connected.


Carbon monoxide detectors will not detect explosive mixtures; thus the device is often recommended to complement the CO detector. Combination explosive gas leak and carbon monoxide detectors exist.[1][2]


A detector for propane is best placed down low near the floor, as propane is heavier than air.[3] A detector for natural gas (city gas) is best placed up high, near the ceiling.[3] Some detectors can detect both natural gas or propane, but this requires a compromise location.[4]


  1. ^ Fixed flammable gas detector systems on offshore installations: optimization and assessment of effectiveness (PDF) (Technical report). UK Health and Safety Executive. 2017. Research Report RR1123.
  2. ^ Tross, Kasey (2024-01-09). "The Best Gas Leak Detectors". SafeWise. Retrieved 2024-05-23.
  3. ^ a b "What is Natural Gas". - Connecticut's Official State Website. Retrieved 2022-08-14.
  4. ^ "Kos Galatsis - Environmental air quality monitoring solutions". Retrieved 2024-05-23.