• ID: mq2
• Name: MQ2 Methane, Butane, Liquefied Petroleum Gas (LPG), and Smoke Sensor
• Category: gaseous
• Manufacturer: seeed
• Connection: analog
• Kit: hak
• Link: http://wiki.seeed.cc/Grove-Gas_Sensor-MQ2/

The MQ2 Gas Sensor module is useful for gas leakage detection (in home and industry). It can detect LPG, i-butane, methane, alcohol, hydrogen, smoke, and other combustible gases. It's a medium-sensitivity sensor with a detection range of 300-10,000 ppm.