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Varenr. SEN0465

Gravity: Factory Calibrated Electrochemical Oxygen Sensor (0-25%Vol, I2C & UART)


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  • Product wiki
  • Introduction

    How An Electrochemical Oxygen Sensor Works - Gravity: O2 Sensor (Calibrated) - I2C & UART

    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. 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.

    The probe adopts the electrochemical principle, has the characteristics of strong anti-interference ability, high stability, high sensitivity, etc., and 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 Raspberry Pi. The easy-to-use Gravity interface, coupled with our sample code, can quickly build an oxygen concentration detector.

    DFRobot has introduced 12 gas detection sensors in this series, CO, O2, NH3, H2S, NO2, HCL, H2, PH3, SO2, O3, CL2, HF, which are used in exactly the same way and data format, so you can combine them according to your needs.

    Gravity: O2 Sensor (Calibrated) - I2C&UART

    I2C Oxygen Sensor Selection Guide

    Product Gravity: I2C Oxygen Sensor

    Gravity: O2 Sensor (Calibrated)

    - I2C & UART

    Gravity: Electrochemical Oxygen Sensor  (0-100%Vol) - I2C
    SKU SEN0322 SEN0465 SEN0496



    0~25%Vol 0~25%Vol 0~100%Vol



    Manual calibration Factory calibration Manual calibration
    Output Signal I2C I2C、UART、Analog I2C



    Electrochemical Electrochemical Electrochemical
    Stability <2%/Month <2%/Month <10%/Year
    Response Time ≤15S ≤15S  0.1%~20.9%<40S  20.9%~100%<5S


    Pressure Range

    101kPa±10% 101kPa±10% 0.5 - 2.0 Bar



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  • Strong anti-interference ability
  • High stability
  • High sensitivity
  • Specification

  • 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
  • Shipping List

  • Gravity: O2 Signal Conversion Board x1
  • O2 sensor probe x1
  • Gravity - 4pin Cable x1
  • Relaterede varer