Adafruit
Adafruit MiCS5524 CO, Alcohol and VOC Gas Sensor Breakout
The Adafruit MiCS-5524 Gas Sensor Breakout is a robust MEMS sensor from SGX Sensortech for detecting carbon monoxide, natural gas leaks, alcohol, and volatil...
The Adafruit MiCS-5524 Gas Sensor Breakout is a robust MEMS sensor from SGX Sensortech for detecting carbon monoxide, natural gas leaks, alcohol, and volatile organic compounds (VOCs). It provides a simple analogue voltage output that increases in proportion to the concentration of detected gas — just power it at 5V and read the analogue pin.
The sensor is suitable for indoor air quality monitoring, breath checking, and early fire detection applications. Note that while it detects multiple gas types, it cannot differentiate between them.
Key Features
- Multi-Gas Detection – Sensitive to CO (~1–1000 ppm), Ammonia (~1–500 ppm), Ethanol (~10–500 ppm), H2 (~1–1000 ppm), and Methane/Propane/Iso-Butane (~1000+ ppm)
- Analogue Output – Voltage increases proportionally with detected gas concentration
- 5V Operation – Simple power and read interface
- Enable Pin – Pull high to power off the heater and conserve energy
- Low Heater Current – 25–35 mA when active
- MEMS Technology – Robust and compact sensor element
Ideal For
- Indoor air quality monitoring projects
- Gas leak detection experiments
- Educational sensor projects
- Environmental monitoring prototypes
Package Contents
- 1× Adafruit MiCS-5524 Gas Sensor Breakout (assembled and tested)
- 1× Header pin strip
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- ppm
- ppm means parts per million, a common way to express very small gas concentrations in air. For CO₂ sensors, the ppm range tells you what levels the sensor can measure, such as normal indoor air through to poorly ventilated spaces.
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