SGP40
Overview
The Sensirion SGP40 is a digital volatile organic compound (VOC) sensor designed for accurate indoor air quality monitoring. It uses a metal-oxide (MOx) based gas sensor and CMOSens technology to provide a humidity-compensated VOC signal, making it suitable for applications where CO2 measurement is not required. The sensor communicates via I2C and operates from a 1.7V to 3.6V supply.
Why Choose This Part
Engineers choose the SGP40 for its integrated humidity compensation, which simplifies design by eliminating the need for a separate humidity sensor and associated compensation algorithms. Its small DFN package and low power consumption make it suitable for compact, battery-powered devices. The included Gas Index Algorithm support further streamlines development, providing a robust air quality index without complex sensor fusion.
Applications
Key Specifications
Getting Started
To get started with the SGP40, use Sensirion's provided libraries and code examples, often available for popular microcontroller platforms like Arduino or ESP32. Connect the sensor's I2C interface to your microcontroller. Sensirion also offers evaluation kits, such as the SEK-SEN4X, which provide a straightforward way to interface with their environmental sensors, including the SGP40.
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