The Triplett 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 Sulfide. The Triplett GSM100 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. The Triplett GSM100 has an auto zero calibration in fresh air, a Hold button that freezes the measurement, and an Auto power off with disable to conserve battery life.