DFRobot
Gravity: Electrochemical Oxygen Sensor (0-100%Vol) - I2C
This full-scale oxygen sensor uses an original AO2 CiTiceL electrochemical probe to measure oxygen concentrations from 0–100%Vol via I2C digital output. A bu...
This full-scale oxygen sensor uses an original AO2 CiTiceL electrochemical probe to measure oxygen concentrations from 0–100%Vol via I2C digital output. A built-in calibration algorithm on the signal board supports single-point or double-point calibration for accurate readings in demanding environments.
The electrochemical sensing principle provides strong anti-interference ability, high stability, and up to two years of service life. Compatible with Arduino, ESP32, Raspberry Pi, and other mainstream controllers, the sensor uses DFRobot's Gravity interface for quick plug-and-play connections.
Key Features
- Wide Measurement Range – 0–100%Vol oxygen concentration
- I2C Digital Output – Simple two-wire communication
- Built-in Calibration – Single-point or double-point calibration via onboard algorithm
- Strong Anti-Interference – Electrochemical principle with high stability and sensitivity
- Long Lifespan – Over 2 years in air
- Gravity Interface – Plug-and-play with compatible controllers
Specifications
- Measuring Range: 0–100%Vol
- Working Voltage: 3.3–5.5 V DC
- Output Signal: I2C
- Working Pressure Range: 0.5–2.0 Bar
- Operating Temperature: −20 °C to +50 °C
- Operating Humidity: 0–99% RH (non-condensing)
- Response Time: <5 s (20.9–100%); <40 s (0.1–20.9%)
- Stability: <10%/year
- Board Size: 32 × 27 mm
- Mounting Hole: 3.1 mm inner / 6 mm outer diameter
Ideal For
- Oxygen generators and concentrators
- Automobile exhaust analysis
- Air-fuel ratio detection
- Environmental oxygen monitoring
Package Contents
- 1× AO2 Oxygen Sensor Signal Adapter Board
- 1× AO2 Oxygen Sensor Probe
- 1× Gravity 4-Pin Cable
- 1× Molex 2510 to PH2.0 Cable (20 cm)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- ESP32
- ESP32 is a family of microcontroller modules with built-in wireless features such as Bluetooth and WiFi. Knowing this product uses an ESP32-based module helps explain how it provides wireless serial communication and firmware update features.
- Gravity
- Gravity is DFRobot’s plug-in connector system for sensors, motors and modules, using standard cables to reduce loose jumper wiring. It matters because Gravity-compatible parts can connect directly to these ports, while non-Gravity parts may need adapters or manual wiring.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
Find this product in
Brands
Supplier page — dfrobot.com
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Related Tutorials
Free guides on learn.littlebird.com.au
