General Tools Natural Gas Detector, Leak Sniffer Pen #PNG1 General Tools PNG1 Combustible Gas Detector is ideal for detecting natural gas (methane), propane or butane from tanks, plumbing and appliances. This handy pen type gas detector is a necessity for every household. Features different alarms for leaks, sensor fault and low battery. It is sensitive, reliable and easy to operate. Fast response and fast resume. Automatically sets zero measurement baseline upon startup in fresh air. Redundant visual and audible alarms. Double molded hand grip. Range is 0 to 100 percent LEL (Lower Explosive Limit). Low alarm (20+/-5)% LEL to (50+/-5)% LEL. High alarm (50+/-10)% LEL. High/Low Audible Alarm Levels 65dB. Sampling technique is natural diffusion. Operating temperature is -4 to 131 degrees Fahrenheit (-20 to 55 degrees Celsius) at 95% RH. Includes wrist strap, User's Manual, batteries and 1-Year Warranty. Power source is 2 AA batteries (included). Features QUICK DETECTION: Detects natural gas, compressed natural gas, methan (CH4), propane, butane, liquid natural gas (LNG), petroleum gas (LPG). VISUAL AND AUDIBLE ALERTS: Gas detector has an visual and audible alerts that indicates how severe the gas leak may be; green signals on, yellow indicates 200-Ppm, red indicates 500-Ppm. SENSITIVE: Gas sniffer comes has catalytic combustion sensor; multiple home and commercial uses for detecting the unseen presence of dangerous natural gases. PRE-CALIBRATED: Gas leak detector comes pre-calibrated; the detection tool is ready for use right on arrival. COMPACT: Unlike other natural gas leak detectors ours is compact and lightweight and can be taken on the go. USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.