> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt # 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. ## How to buy - **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0322:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart. - **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN0322:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.) - **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there. - **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works) - **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt ## 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)