Add Reliable Oxygen Sensor I2C Gravity by DFRobot Sensing to Your Next Build

The Gravity: I2C Oxygen Sensor is based on electrochemical principles and it can measure the ambient O2 concentration accurately and conveniently. With high anti-interference ability, high stability, and high sensitivity, this Arduino-compatible oxygen sensor can be widely applied to fields like portable devices, air quality monitoring devices, and industries, mines, warehouses, and other spaces where the air is not easy to circulate.

This compact oxygen sensor supports I2C output, it can be calibrated in the air, can accurately measure the oxygen concentration in the environment. It is compatible with many mainboards like Arduino Uno, esp32, Raspberry Pi, and so on. Its effective range is 0~25%Vol, and resolution can reach to 0.15%Vol. It supports a wide range of input voltage: 3.3V to 5.5V. Moreover, the lifetime is as long as 2 years. With a simple Gravity interface and practical sample code, you can build your own oxygen concentration monitor easily and conveniently.

Important: Use the official DFRobot links below for wiring, sample code, downloads, and the latest setup notes for this SKU.

Why you'll love it

High sensitivity
I2C Interface
Compatible with both 3.3V and 5V micro-controllers
Polarity protection
Detection of Gas: oxygen
Operating Voltage: 3.3 to 5.5V DC

What you can build

This part fits monitoring, measurement, logging, alarms, and automation builds. It works well in Arduino, ESP32, and Raspberry Pi style projects where you need reliable real-world data from the oxygen sensor i2c gravity by dfrobot.

Starter bundles

Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus sensor cables, headers, or a matching expansion shield for faster setup.

Recommended add-ons

Useful add-ons include displays, data logging modules, waterproof enclosures, and matching Gravity cables or sensor shields.

Technical specifications

Product	Oxygen Sensor I2C Gravity by DFRobot
SKU	SEN0322
Brand	DFRobot
Interface	I2C
Detection of Gas	oxygen
Operating voltage	3.3 to 5.5V DC
Output Signal	I2C output
Measurement Range	0~25%Vol
Maximum Measurement limit	30%Vol
Resolution	0.15%Vol

Pinout & usage notes

Check the supported input voltage before wiring so the module matches your controller and power source. Use the correct SDA and SCL pins on your controller and make sure the bus voltage is compatible. If you are using Gravity connectors, align the plug correctly and avoid forcing the cable into the wrong header.

DFRobot resources

Official product page: View on DFRobot
Wiki / documentation: Open DFRobot wiki

What’s in the box

1 × Oxygen Sensor I2C Gravity by DFRobot

Frequently Asked Questions

Can I use this for logging or monitoring projects? Yes. It is a good fit for data collection, automation, and alert-based builds when paired with a supported controller.

Does it work with other boards too? Often yes, as long as voltage, interface, and pin mapping match. ESP32 and Raspberry Pi users should still check the official docs first.

Where can I find wiring and examples? Use the official DFRobot product page and wiki links below for guides, downloads, and code examples.