Gravity: Electrochemical Oxygen / O2 Sensor (0-100%Vol, I2C)
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Description
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
Specifications
| Physical Quantity Detected | Oxygen / O2 concentration |
| Measuring Range | 0~100% |
| Working Voltage | 3.3～5.5V DC |
| Output Signal | I2C |
| Working Pressure Range | 0.5~2.0Bar |
| Operating Temperature Range | -20°C ~ +50°C |
| Operating Humidity Range | 0-99% RH (non-condensing) |
| Response Time | ＜5S |
| Lifespan | ＞2 years (in air) |
| Size | 32mm*27mm/1.26*1.06 inch |
| Mounting Hole Size | inner diameter 3.1mm(0.12 inch)/outer diameter 6mm(0.24 inch) |
In the box
| Gravity: AO2 Oxygen / O2 Sensor Signal Adapter Board | 1 |
| AO2 Oxygen / O2 Sensor Probe | 1 |
| Gravity-4Pin Cable | 1 |
| Molex 2510 - PH2.0 cable (20CM) | 1 |
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