Mikroe CO2 Click contains Sensirion’s miniature STC31 gas concentration CO2 sensor designed for high-volume applications. The STC31 utilizes a revolutionized thermal conductivity measurement principle. This results in superior repeatability and long-term stability. The outstanding performance of these sensors is based on Sensirion’s patented CMOSens® sensor technology. It combines the sensor element, signal processing, and digital calibration on a small CMOS chip. It features a digital I2C interface, which makes it easy to connect directly to MCU.