Datasheet : https://www.parallax.com/sites/default/files/downloads/605-00009-MQ-5-Datasheet.pdf_x000D_ _x000D_ FEATURES _x000D_ * High sensitivity to LPG, natural gas , town gas _x000D_ *Small sensitivity to alcohol, smoke. _x000D_ * Fast response . _x000D_ * Stable and long life _x000D_ * Simple drive circuit _x000D_ _x000D_ APPLICATION _x000D_ They are used in gas leakage detecting equipments in family and industry, are suitable for detecting of _x000D_ LPG, natural gas , town gas, avoid the noise of alcohol and cooking fumes and cigarette smoke.