The Extech EZ40 EzFlex burnable Gas Detector a fast and hands-down way for HVAC engineers to identify and pinpoint gas leaks. The Extech EZ40 a 406 mm -LRB- 16 inch -RRB- negotiable, goose neck that allows access into Herculean to reach locations and provides unanalyzable one-handed operation with a thumb disciplined sensitivity adjustment dial that can be used to eliminate background gas levels. The EZ 40 burnable gas meter can an sensational range of 17 contrary gases and has both apparent and audible alarms at 10 % lower bursting limit -LRB- LEL -RRB- for methane. even the smallest of gas leaks with the highly irritable and flexible Extech EzFlex gas leakage detector. Gas Detected fresh Gas Methane Ethane Propane Butane Acetone Alcohol Ammonia Steam Carbon -LRB- not to quantify -RRB- Gasoline Jet Fuel Hydrogen Sulfide Smoke Indutrial Solvents Lacquer Thinner Naphtha .