GSM100 combustible gas detector identifies the presence of combustible gases such as methane, hydrogen, carbon monoxide, propane, ethylene, ethane, hexane, benzene, iso-butane, ethanol, acetaldehyde, formaldehyde, toluene, p-xylene, ammonia and hydrogen sulphide. It will also detect common mixtures that would include or emit more than one of these gases: natural gas (typically consists of a high percentage of methane and smaller percentages of propane and other gases), paint thinners, industrial solvents, dry cleaning fluids and gasoline. The GSM100 has a 16" (406mm) adjustable gooseneck probe with replaceable heated sensor, TRI mode detection (visual, audible and vibration alerts), five red LEDs that display the threshold levels of a measurement with two (low and high) sensitivity settings, plus audible tick (85dB) and vibration alert rates that increase as the detected gas level gets stronger.