Gravity: O2 Sensor (Calibrated, I2C & UART)

DFRobotSKU: SEN0465
Sale price £81.50
incl. VAT
excl. VAT
Only 4 units left

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This is a sensor that detects oxygen concentration and supports three output modes: analog, I2C and UART. The probe has been calibrated at the factory, which can quickly and accurately measure the concentration of oxygen in the environment.

This type of sensor can be widely applied to fields like portable devices, air quality monitoring devices, industries, mines, warehouses, and other spaces where the air is not easy to circulate and requires monitoring.

The probe adopts the electrochemical principle and has the characteristics of strong anti-interference ability, high stability and high sensitivity. The service life is as long as two years. The sensor has 32 modifiable I2C addresses, an integrated temperature compensation algorithm and a threshold alarm function, It has good compatibility with mainstream main control devices such as Arduino, ESP32 and the Raspberry Pi.

The easy-to-use Gravity interface, coupled with our sample code, can quickly build an oxygen concentration detector.

The product wiki is on hand to help you get started.

Connection Example - Arduino


  • Detects oxygen concentration
  • Factory calibrated
  • I2C and UART
  • Strong anti-interference ability
  • High stability
  • High sensitivity


  • Detection Gas: Oxygen (O2)
  • Detection range: 0~25%Vol
  • Working Voltage: 3.3~5.5V DC
  • Working Current: <5mA
  • Output Signal: I2C, UART (0~3V), analog voltage
  • Working Temperature: -20~50℃
  • Working Humidity: 15~90%RH (non-condensing)
  • Storage Temperature: -20~50℃
  • Storage Humidity: 15~90%RH (non-condensing)
  • Lifespan: >2 years (in the air)
  • Adapter Plate Size: 37*32mm
  • Compatibility: Arduino, ESP32, Raspberry pi


Package Contents

  • 1x Gravity: O2 Signal Conversion Board
  • 1x O2 sensor probe
  • 1x Gravity - 4-pin cable

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