Gravity: Electrochemical Oxygen / O2 Sensor (0-25%Vol, I2C)

The Gravity Electrochemical Oxygen Sensor is an ambient O2 measurement module offering a 0 to 25%Vol detection range with digital I2C output. Operating between 3.3V and 5.5V, it is ideal for students, makers, and developers building air quality systems and safety monitors for enclosed spaces.

Electrochemical ambient O2 sensing

Utilising electrochemical principles, this sensor measures ambient oxygen concentration from 0 to 25%Vol with a resolution of 0.15%Vol and a rapid response time of 15 seconds or less. It features high sensitivity, strong anti-interference capability, and supports simple manual calibration in open air.

I2C interface and broad compatibility

The module communicates via a standard Gravity I2C interface and operates across a wide 3.3V to 5.5V DC supply range. This enables plug-and-play integration with popular development boards including Arduino Uno, ESP32, and Raspberry Pi.

Durable design with hardware protection

Engineered with built-in polarity protection, the sensor delivers reliable operation under standard atmospheric pressure conditions and ambient temperatures from -20°C to 50°C. It offers a working lifespan of over two years in normal atmospheric air.

Versatile safety and environmental monitoring

With its compact footprint and stable measurement profile, the sensor is well suited for portable gas detectors, environmental testing stations, and air circulation tracking in warehouses, mines, and industrial facilities.

Complete mounting and connection kit

Each unit comes complete with a Gravity 4-pin I2C connecting cable along with four M3 nylon standoffs and eight M3 screws for secure installation inside project enclosures.

Downloads & documentation

• Product wiki (DFRobot)