... visible display. It is applied to detect methane, natural gas, LPG, coal gas, ethane, propane, acetylene, butane, isobutene, ... find the gas leakage point• Long and flexible gooseneck tube, adjustable detecting range• Low-voltage alarm, under-voltage ... time concentration to full range Specifications:• Detecting Gas: combustible explosive gas (such as natural gas, LPG, etc)• Sensor: semiconductor• ...