MQ Gas sensor module

Description

The MQ Gas Sensor module is useful for gas leakage detecting in home and industry. It can detect LPG, i-butane, propane, methane ,alcohol, hydrogen and smoke.
The module have a built-in variable resistor to adjust the sensitivity of the sensor.
Features:
• Size: 32mmX22mmX27mm
• Chip: LM393, ZYMQ-2 gas sensors
• Working voltage: DC 5V
• Dual signal output (analog output, and TTL level output)
• TTL output & 0~5V analog output voltage, the higher the concentration the higher the voltage.