... 24V -Detected gas:LPG,LNG,CNG -Sound: 85dB/3 meter -welcome OEM&ODM -Ideal for all kitchen Wireless GAS Leak Alarm Features ... radius from the gas source, and well-ventilated place2),If the gas is heavier than the air, the gas detector should be installed ... gas is lighter than the air,the gas detector should be installed lower 0.3m than the ceiling.Packing:110pcs/ctn Independent LPG Gas Leak Detector ...