They are used in gas leakage detecting equipments in family and industry, are suitable for detecting of LPG, natural gas , town gas, avoid the noise of alcohol and cooking fumes and cigarette smoke. Features High sensitivity to LPG, natural gas , town gas Small sensitivity to alcohol, smoke. Fast response Stable and long life Simple drive circuit Typical detection ranges MQ-5: town gases, hydrogen, 100ppm to 3,000ppm Documents Datasheet