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

Introducing the SGP40 Multi-Pixel Gas Sensor – your very own digital nose! This advanced air quality sensor from Sensirion combines multiple metal-oxide (MOX) sensing and heating elements into a single integrated unit, allowing you to monitor indoor air quality with ease. Unlike traditional MOX sensors that require manual management of the heater and analog readings, the SGP40 handles it all for you via an easy-to-use I2C interface.

Key Features:

• Integrated MOX Sensor: The SGP40 features a hot-plate MOX sensor and a built-in microcontroller that controls the power to the plate, reads the analog signals, and provides the processed data over I2C. This makes it incredibly easy to integrate into your project without dealing with complicated setups.

• VOC and H2 Detection: Designed for indoor air quality monitoring, the sensor can detect a wide range of Volatile Organic Compounds (VOCs) and H2 gases, providing you with a better understanding of your environment’s air quality.

• Air Quality Index: Unlike the SGP30 which provides TVOC/eCO2 values, the SGP40 outputs a processed air quality value on a scale from 0 to 500, calculated using Sensirion's software algorithm based on raw sensor data. This makes it great for tracking overall air quality trends rather than specific gas measurements.

• Humidity Compensation: For more accurate readings, the SGP40 supports humidity compensation. You’ll need an external humidity sensor to feed the relative humidity (RH%) data over I2C, allowing the SGP40 to adjust for temperature and humidity-related variations, enhancing the precision of its readings.

• Easy Integration: We’ve made it simple to incorporate the SGP40 into your project by mounting the sensor onto a STEMMA QT PCB. This chainable I2C interface is compatible with SparkFun’s Qwiic connectors, allowing you to quickly connect the sensor to a development board without soldering. Simply plug in the compatible QT cable to get started (sold separately).

• Flexible Voltage Support: The sensor is designed to work with both 3.3V and 5V systems, so it’s compatible with platforms like the Arduino Uno and Feather M4.

Whether you’re working on an indoor air quality monitoring system or need a sensor for your next environmental project, the SGP40 gives you accurate, reliable data with minimal setup required.