About This

MQ-2 Smoke LPG Butane Hydrogen Gas Sensor
Input Voltage : DC5V & Power consumption ( current ): 150mA & DO output: TTL digital 0 and 1 ( 0.1 and 5V) & AO output:0.1-0 .3 V ( relative to pollution ) , the maximum concentration of a voltage of about 4V
Special note: After the sensor is powered , needs to warm up around 20S, measured data was stable , heat sensor is a normal phenomenon , because the internal heating wire , if hot is not normal .
Size: 32(L)x20(W)x22(H)mm/1.26"x0.79"x0.76"
Package Include: 2PCS MQ-2 Sensor Module