... time: 10 seconds1) Detecting principle: catalytic combustion2) Detected gas: combustible gas3) Measurement range: 0-100% LEL /0 ... can be used in hazardous areas indoors and outdoors, where combustible gas is produced, stored, used, etc., such as ... , LPG (Liquefied Petroleum Gas) station , pharmaceutical, gas transmission and distribution, etc. to detect the leakage and show the leaking concentration ...