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...
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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 board carries a small or fine-pitched component and brings its connections out to standard, breadboard- and header-friendly pins. Describing a part as a breakout means it can be wired into a project without soldering directly to the component's tiny 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 single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- 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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