This is an LPG gas sensor. It has an MQ5 probe which is very sensitive with LPG, natural gas, and town gas. It is less sensitive with alcohol, cooking fumes and cigarette smoke. The sensitivity can be adjusted by the potentiometer. The output is proportional to the density of gas. You can use analog reading to read the data from this sensor. To ease the difficulty of using this sensor, a Gravity Interface is adapted to allow plug & play. The Arduino IO expansion shield is the best match for this senor connecting to your Arduino. Connection Example – I/O Expansion Shield V7 Specifications Power supply needs: 5V Interface type: Analog Pin Definition: 1-Output 2-GND 3-VCC High sensitivity to LPG, natural gas, town gas Small sensitivity to alcohol, smoke Fast response Stable and long life Simple drive circuit Size: 40 x 20mm Resources Product Wiki MQ5 datasheet Schematic Package Contents 1x Arduino LPG Gas sensor (MQ5) 1x Gravity Analog Cable

J905931090925Gravity: Analog LPG Gas Sensor (MQ5)