MQ-2 Røyk Gass LPG Butan Sensor Tester For Arduino
Size: 32 x 22 x 27mm
Chip: LM393, ZYMQ-2 gas sensors
Working voltage: DC 5V
AO output :0.1-0 .3 V (relative to pollution), the maximum concentration of a voltage of about 4V
DO output: TTL digital 0 and 1 (0.1 and 5V)
Input voltage: DC5V Power consumption (current): 150mA
After the sensor is powered, needs to wait about 20S, before measured data is stable, heat sensor is a normal phenomenon, because the internal heating wire.