General Tools PNG2000A Handheld Natural Gas Detector Pen

General Tools PNG2000A Handheld Natural Gas Detector Pen is designed to detect LNG, LPG, CH4, Methane, and Butane gases. The General Tools PNG2000A features audible and visual alerts, pre-set calibration, and a simple LED indication scale: Green (ON), Yellow (200ppm), Red (500ppm).