# Gravity: I2C Oxygen Sensor

**Type:** Product page · **SKU:** SEN0322 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gravity-i2c-oxygen-sensor.html ([markdown](https://core-electronics.com.au/gravity-i2c-oxygen-sensor.html.md))

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...

## Pricing

- **Price:** $88.60 (inc GST) — $80.55 AUD, exc GST
- **Quantity discounts:** 6+ $76.52 (exc GST) · 12+ $73.30 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 2 today, and up to 1500 more in 8–12 days.

## Description

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

This compact dfrobot oxygen sensor supports **I2C** output, it can be calibrated in the air, can accurately measure the oxygen concentration in the environmentit. It is compatible with many mainboardslike [Arduino Uno](https://core-electronics.com.au/uno-r3.html), [esp32](https://core-electronics.com.au/development-boards/esp32.html),[Raspberry Pi ](https://core-electronics.com.au/raspberry-pi/boards.html)and so on. Its **measurement range is 0~25%Vol**, and resolution can reach to 0.15%Vol. It supports wide range input voltage: **3.3V to 5.5V**.Moreover, the lifetime is as long as 2 years. With simple [Gravity](https://core-electronics.com.au/catalogsearch/result/?q=gravity) interface and practical sample code, you can build your own oxygen concentration monitor easily and conveniently.

**I2C Oxygen Sensor Selection Guide**

 | **Product** | **[Gravity:Electrochemical Oxygen Sensor (0-25%Vol) - I2C](https://www.dfrobot.com/product-2052.html)** | **[Gravity:Electrochemical O2 Sensor (Calibrated)](https://www.dfrobot.com/product-2510.html)**  **[ - I2C & UART](https://www.dfrobot.com/product-2510.html)** | **[Gravity:Electrochemical Oxygen Sensor (0-100%Vol) - I2C](https://www.dfrobot.com/product-2569.html)** |
|---|---|---|---|
| **SKU** | **[SEN0322](https://core-electronics.com.au/gravity-i2c-oxygen-sensor.html)** | **[SEN0465](https://core-electronics.com.au/gravity-o2-sensor-calibrated-i2c-uart.html)** | **[SEN0496](https://core-electronics.com.au/gravity-electrochemical-oxygen-sensor-0-100vol-i2c-1.html)** |
| **Detection**  **Range** | 0~25%Vol | 0~25%Vol | 0~100%Vol |
| **Calibration**  **Method** | Manual calibration | Factory calibration | Manual calibration |
| **Output Signal** | I2C | I2C?UART?Analog | I2C |
| **Working**  **Principle** | Electrochemical | Electrochemical | Electrochemical |
| **Stability** | <2%/Month | <2%/Month | <10%/Year |
| **Response Time** | =15S | =15S | 0.1%~20.9%<40S 20.9%~100%<5S |
| **Operating**  **Pressure Range** | 101kPa±10% | 101kPa±10% | 0.5 - 2.0 Bar |
| **Temperature**  **Compensation** | × | v | × |

### Features

- High sensitivity
- I2C Interface
- Compatible with both 3.3V and 5V micro-controllers
- Polarity protection
 
### Specification

- 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
- Sensitivity: (0.10±0.05) mA (in the air)
- Stability: <2% (Every month)
- Repeatability: <2%
- Response Time: =15 seconds
- Operating Temperature: -20~50°C
- Operating humidity: 0~99%RH (no condensation)
- Pressure Range: standard atmospheric pressure ±10%
- Lifetime:> 2 years (in the air)
- Dimension(L x W x H): 37 \* 27 \* 24.5 mm/1.46 \* 1.06 \* 0.97 inches
- Weight:0.037kg
 
### Documents

- [Product wiki](https://wiki.dfrobot.com/Gravity_I2C_Oxygen_Sensor_SKU_SEN0322)
- [More Documents](https://wiki.dfrobot.com/Gravity_I2C_Oxygen_Sensor_SKU_SEN0322#target_6)
 
### Parts List

- Gravity: Electrochemical Oxygen Sensor (0-25%Vol, I2C) \*1
- Gravity-4pin I2C Cable \*1
- M3\*10 Nylon post \*4
- M3\*5 Screws \*8

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/s/e/sen0322-1.jpg)