... visible display. It is applied to detect methane, natural gas, LPG, coal gas, ethane, propane, acetylene, butane, isobutene, pentane, ... time concentration to full range Specifications:• Detecting Gas: combustible explosive gas (such as natural gas, LPG, etc)• Sensor: semiconductor• Detection ... -30°C~60°C Humidity: ≤93% RH (non-condensing)• Warm-up time: ≤30S• Response time: ≤10S• Indication: LCD ...