Adafruit
Adafruit SGP30 Air Quality Sensor Breakout - VOC and eCO2
The Adafruit SGP30 is a multi-pixel MOX (metal-oxide) gas sensor from Sensirion that measures Total Volatile Organic Compounds (TVOC) and equivalent CO2 (eCO...
The Adafruit SGP30 is a multi-pixel MOX (metal-oxide) gas sensor from Sensirion that measures Total Volatile Organic Compounds (TVOC) and equivalent CO2 (eCO2) for indoor air quality monitoring. With fully calibrated output signals and I2C interfacing, it provides a straightforward way to detect changes in air quality.
The sensor combines multiple metal-oxide sensing elements on a single chip along with a built-in microcontroller that handles power management, analog reading, baseline calibration, and TVOC/eCO2 calculation. Unlike the CCS811, this sensor does not require I2C clock stretching.
Key Features
- TVOC Measurement – 0 to 60,000 ppb (parts per billion)
- eCO2 Measurement – 0 to 60,000 ppm (equivalent CO2 calculated from H2 concentration)
- Calibrated Output – Typical accuracy of 15% within measured values
- Built-in Baseline Calibration – Automatic calibration tracking with ability to save/restore baselines
- Humidity Compensation – Accept external humidity data over I2C for improved accuracy
- I2C Interface – No clock stretching required
- 3.3 V / 5 V Compatible – Onboard 1.8 V regulator and level shifting
Also Consider
- SCD-40 True CO2 Sensor – Photoacoustic sensor that directly measures CO2 (400–2,000 ppm)
- SCD-30 NDIR CO2 Sensor – True CO2 sensor with 400–10,000 ppm range
Ideal For
- Indoor air quality monitoring and trend detection
- Smart ventilation and HVAC triggering
- Environmental sensing projects
- Air quality comparison and relative measurement
Package Contents
- 1× Adafruit SGP30 Air Quality Sensor Breakout
Jargon buster
Plain-language definitions for the technical terms used above.
- breakout
- A breakout is a small circuit board that makes a tiny or hard-to-solder component easier to connect to with standard pins. It matters because this OLED module can be wired into a microcontroller project without needing to solder directly to the display’s fine contacts.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- ppm
- ppm means parts per million, a common way to express very small gas concentrations in air. For CO₂ sensors, the ppm range tells you what levels the sensor can measure, such as normal indoor air through to poorly ventilated spaces.
- VOC
- Volatile organic compounds are gases released from things like paints, cleaners, smoke, and some plastics. A VOC reading helps indicate indoor air quality, but it is usually an index or estimate rather than a direct identification of each chemical.
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