MQ8
Hanwei Electronics
Gas Sensors
Hanwei Electronics is a Chinese gas-sensor manufacturer based in Zhengzhou. Its MQ-series semiconductor gas sensors, such as the MQ-2, MQ-7 and MQ-135, are widely used in gas and air-quality detection modules.
MQ309A CO/CH4 Gas Sensor Module by Hanwei Electronics: datasheet PDF, pinout and specifications.
MQ307A CO Gas Sensor Module by Hanwei Electronics: datasheet PDF, pinout and specifications.