ITEM NAME:MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module Y8Z8 MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module Y8Z8 Output signal has double meaning: the analog output and the output level TTL High sensitivity to LPG, gas, alcohol, hydrogen Quick response and recovery // Good stability and long service life Ideal for home or factory gas leakage detection has Use for detection: combustible gases such as LPG, butane, methane, alcohol, propane, hydrogen, to smoke, etc. Characteristics: Detection range: 300 to 10000ppm Operating voltage: 5V DC Dimensions (W x D x H): ca.1,35 x 0.85 x 1 inch Package included: 1 x smoke detector Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..High sensitivity to LPG, gas, alcohol, hydrogen. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.