Smoke Sensor - MQ-2

The MQ-2 is a smoke and combustible gas sensor from Winsen. It can detect flammable gas in a range of 300 - 10000ppm. It\'s most common use is domestic gas leakage alarms and detectors with a high sensitivity to propane and smoke. The sensing material is SNO₂ for which the conductivity is lower in clean environments and higher when smoke or flammable gas is present. A simple circuit makes measuring this change in conductivity and turning it into data fairly straight-forward, but does require some calibration.

For easy Solderability; use our [Gas Sensor Breakout Board](https://www.sparkfun.com/products/8891).

**Documents:**

* [Datasheet](https://cdn.sparkfun.com/assets/3/b/0/6/d/MQ-2.pdf)

**Videos**