SGP30 Air Quality Sensor Breakout - VOC and eCO2 Adafruit SGP30 Air Quality Sensor Breakout - VOC and eCO2 is a fully integrated MOX gas sensor from the sensor experts at Sensirion. The SGP30 Sensor features I2C interfacing and fully calibrated output signals with a typical accuracy of 15% within measured values. The SGP30 combines multiple metal-oxide sensing elements on one chip to provide more detailed air quality signals. This gas sensor can detect a wide range of Volatile Organic Compounds (VOCs) and H2 and is intended for indoor air quality monitoring. When connected to a microcontroller (running Adafruit's library code), it will return a Total Volatile Organic Compound (TVOC) reading and an equivalent carbon dioxide reading (eCO2) over I2C.