Adafruit SGP40 Air Quality Sensor Breakout - VOC Index - STEMMA QT / Qwiic

Adafruit SGP40 Air Quality Sensor Breakout - VOC Index - STEMMA QT / Qwiic

This is a very fine air quality sensor from the sensor experts at Sensirion, with I2C interfacing so

you don't have to manage the heater and analog reading of a MOX sensor. It combines multiple

metal-oxide sensing and heating elements on one chip to provide more detailed air quality signals.

The SGP40 has a 'standard' hot-plate MOX sensor, as well as a small microcontroller that controls

power to the plate, reads the analog voltage and provides an I2C interface to read from. Unlike the

CCS811, this sensor does not require I2C clock stretching. We currently have an Arduino library with

examples of reading the raw value and also running the Sensirion algorithm to calculate VOC index but

do not have Python support (the Sensirion library is in C and requires a port)

This is a gas sensor that can detect a wide range of Volatile Organic Compounds (VOCs) and H2 and is

intended for indoor air quality monitoring. The SGP40 is the next generation after the SGP30,

but does not give TVOC/eCO2 values out like the SGP30. Instead, raw signal from the sensor