MQ-2 MQ2 Gas Sensor Module Smoke Methane Butane Detection for Arduino

Description:
Size: 32mmX22mmX27mm
Chip: LM393, ZYMQ-2 gas sensors
Working voltage: DC 5V
With a signal output instruction
Dual signal output (analog output, and TTL level output)
TTL output
0~5V analog output voltage, the higher the concentration the higher the voltage
The gas, natural gas, city gas, smoke better sensitivity
With a long service life and reliable stability
Rapid response and recovery characteristics

Package Include:
1 X MQ-2 Gas Sensor

Tutorial link https://randomnerdtutorials.com/guide-for-mq-2-gas-smoke-sensor-with-arduino/