• ID: mq6
• Name: MQ6 Liquefied Petroleum Gas (LPG) and Butane Sensor
• Category: gaseous
• Manufacturer: dfrobot
• Connection: analog
• Link: https://www.dfrobot.com/wiki/index.php/LPG_Gas_Sensor(MQ6)_(SKU:SEN0131)

The MQ6 Gas Sensor module is useful for detecting LPG, iso-butane, propane, and LNG concentrations in the air. It has a detection range of 200-10000 ppm.
For optimum use, it requires calibration after a pre-heat time of at least 24 hours. See the datasheet for details.