This combustible gas leak detector with measuring range of 50 parts per million. The sensitivity wheel is user-adjustable, and the alarm is set at 10% LEL for methane. There is an earphone jack, a soft carrying case, and three C-cell batteries included. It detects methane, natural gas, benzene, ethane, propane, butane, acetone, alcohol, ammonia, gasoline, jet fuel, industrial solvents, lacquer, paint thinner, and naphtha.