... consume: 1W7, Alarm consume 2W8, Alarm volume: ≥90dB 9, Working environmenttemperature15ºC50ºC Humidity: ≤97%RH 10, Alarm density: Coal gas: 1000~5000ppm, Liquid ... petroleum gas: 1000~5000ppm, natural gas: 1000ppm~5000ppm11, Responding time: ≤30S12 ...