The Adafruit MiCS-5524 Gas Sensor Breakout detects a range of gases including carbon monoxide, ammonia, ethanol, hydrogen and methane, providing a simple analogue output for air quality experiments and sensor projects.

Give your next sensor project a nose for gasses with the Adafruit MiCS-5524 Gas Sensor Breakout. 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.

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! All gas sensors require calibration for precision output.

Using it is easy: Power it with 5 VDC and read the analogue voltage off of the output pin. When gasses are detected, the analogue 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 bit of header. You’ll need to do some light soldering to attach the header on – or you can use just plain wires.

Check out the tutorial for files, example code, diagrams and more!

Features

• Adafruit MiCS-5524 Gas Sensor Breakout for detecting carbon monoxide, natural gas, and air quality monitoring
• Detects CO (~1-1000 ppm), Ammonia (~1-500 ppm), Ethanol (~10-500 ppm), H2 (~1-1000 ppm), and Methane/Propane/Iso-Butane (~1,000+ ppm)
• Robust MEMS sensor technology from SGX Sensortech
• Suitable for breath checking and early fire detection applications
• 5 VDC power supply with ~25-35mA heater draw
• Analogue voltage output proportional to detected gas concentration
• EN pin for power control and energy conservation
• Requires 1 second warm-up time after powering on before taking readings
• Assembled and tested breakout board included
• Header pins included (requires light soldering or direct wire connection)
• Hobby, education and experimentation use only – not for safety, medical or finished product applications
• Requires calibration for precision output
• Cannot distinguish between individual gas types detected

Specifications

• Dimensions: 20.0mm x 12.7mm x 3.1mm
• Weight: 0.9g

Revision History

• As of October 09, 2023 we’ve updated this PCB with Adafruit Pinguin to make a lovely and legible silkscreen.

Resources

• App Note on Alcohol detection
• MiCS5524 Datasheet
• EagleCAD and Fritzing files available in tutorial

Package Contents

• 1x Adafruit MiCS5524 CO, Alcohol and VOC Gas Sensor Breakout
• 1x Header strip