Description Simple to use hydrogen gas sensor Used in gas leakage detecting equipments in homes and industrial applications Avoid the noise of alcohol, cooking fumes, LPG,CO Sensitivity can be adjusted by the potentiometer View more Dimensions Size: 40 x 20 mm Links PDF Files Specifications Power Supply: 5V Interface Type: Analog Pin Definition: 1-Output 2-GND 3-VCC High sensitivity to Hydrogen (H2) Stable and long life