# Adafruit MiCS5524 CO / Alcohol / VOC Gas Sensor Breakout

## Overview

![](https://cdn-learn.adafruit.com/assets/assets/000/033/813/medium800/sensors_3199_iso_ORIG.jpg?1468444211)

Give your next sensor project a nose for gasses with the Adafruit MiCS-5524 Gas Sensor Breakout. This breakout makes it easy to use this nice sensor from SGX Sensortech. The MiCS-5524 is a robust MEMS sensor for indoor carbon monoxide and natural gas leakage detection, it's suitable also for indoor air quality monitoring; breath checker and early fire detection.

 **Please note:** This sensor is sensitive to CO ( ~ 1 to 1000 ppm), Ammonia (~ 1 to 500 ppm), Ethanol (~ 10 to 500 ppm), H2 (~ 1 - 1000 ppm), and Methane / Propane / Iso-Butane (~ 1,000++ ppm). **However, it can't tell you which gas it has detected.**

**All gas sensors require calibration for precision output.** Note that the sensor is sensitive to multiple gasses - but cannot tell which it is! That's normal, most gas sensors are like that - so it is best for measuring changes in a _known_ gas density, not detecting _which_ is changing.

**This breakout board is not for any safety, medical or finished product usage**. We're selling it for hobby education & experimentation and don't guarantee it for _any other_ purpose! Note that the sensor is sensitive to multiple gasses - but cannot tell which it is! That's normal, most gas sensors are like that - so it is best for measuring changes in a _known_ gas density, not detecting _which_ is changing.

![](https://cdn-learn.adafruit.com/assets/assets/000/033/814/medium800/sensors_3199_quarter_ORIG.jpg?1468444219)

Using it is easy: Power it with 5 VDC and read the analog voltage off of the output pin. When gasses are detected, the analog voltage will increase in proportion of detected gas. When powered, the heater draws about 25-35mA. You can use the EN pin to power it off (pull it high to 5V to turn off) to conserve energy. Just make sure to wait a second after turning the heater on to make sure its all heated before taking readings.

Each order comes with one assembled and tested MiCS-5524 breakout and a small amount of header. You'll need to do some light soldering to attach the header on - or you can use just plain wires.

- [Next Page](https://learn.adafruit.com/adafruit-mics5524-gas-sensor-breakout/usage.md)

## Featured Products

### Adafruit MiCS5524 CO, Alcohol and VOC Gas Sensor Breakout

[Adafruit MiCS5524 CO, Alcohol and VOC Gas Sensor Breakout](https://www.adafruit.com/product/3199)
Give your next sensor project a nose for gasses with the **Adafruit MiCS-5524 Gas Sensor Breakout.** This breakout makes it easy to use this nice sensor from [SGX Sensortech](http://www.sgxsensortech.com/). The MiCS-5524 is a robust MEMS sensor for indoor...

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