Gas Sensor MQ-2 Gas/Smoke Detector

Description Gas Sensor Module suitable for sensing combustible gas, Smoke, Alcohol, Propane, Hydrogen, Methane and Carbon dioxide concentrations in the air. Includes two LED's to indicate power and gas alarm trigger Adjustable Gas level trigger can be used to fine tune gas sensitivity When gas exceeds trigger level TTL signal (D0) set HIGH Use the analog ping (A0) to continuously monitor gas levels There are four screw holes for easy installation Perfect for use with to be used with and Arduino or with our Flex Radio module. Wireless Gas Sensor Here is a prototype set-up picture of the module connected to the Flex radio module.   Specification Product dimensions: 32 x 20 x 15 (L x W x H) Chip: LM393, ZYMQ-2 gas sensors Working voltage: DC 5V Detection of gas: combustible gases, fumes Detectable concentration: 300-10000ppm (flammable gas) Electrical properties Input voltage: DC5V Power consumption (current): 150mA DO output: TTL digital 0 and 1 (0.1 and 5V) AO output: 0.1 - 0.3V (relative to pollution), the maximum concentration of a voltage of about 4V After the sensor is powered there is a 20 second warm up period before the sensor stabilizes, which is normal Pinouts CC: positive power supply (5V) GND: power supply is negative DO: TTL switching signal output AO: analog signal output