Gravity: Electrochemical Oxygen / O2 Sensor (0-100%Vol, I2C)

The Gravity: Electrochemical Oxygen / O2 Sensor is a full-scale gas detection module designed to measure oxygen concentrations from 0 to 100%Vol using an I2C digital output. Fitted with an original AO2 CiTiceL electrochemical probe, it is ideal for makers, educators, and engineers prototyping oxygen generators, exhaust analyzers, and combustion monitoring systems.

Full-scale AO2 CiTiceL probe

Featuring an authentic AO2 CiTiceL electrochemical sensor probe, this unit covers a wide measurement span of 0 to 100%Vol. It delivers strong anti-interference performance, high measurement stability, and an operational lifespan exceeding two years in ambient air.

Built-in calibration algorithm

The signal adapter board integrates an onboard calibration algorithm that enables quick single-point or double-point manual calibration. This ensures consistent measurement precision across various project environments.

I2C Gravity interface

Operating at 3.3V to 5.5V DC, the module communicates over standard I2C and connects directly to mainstream controllers such as Arduino, ESP32, and Raspberry Pi. The included 4-pin Gravity cable simplifies wiring without requiring complex breadboard setups.

Broad operating parameters

The sensor operates reliably across a pressure range of 0.5 to 2.0 Bar, temperatures from -20°C to 50°C, and relative humidity from 0 to 99% RH non-condensing. It also features a rapid response time of under five seconds.

Solvent vapour precaution

To maintain accuracy and prevent probe degradation, avoid exposing the sensor to high concentrations of solvent vapours during storage, assembly, and active operation.

Downloads & documentation

• Product wiki (DFRobot)