Low cost air quality sensors, indoor air quality sensor, coolant temperature - tatanh1983/conchodom GitHub Wiki

The SCD4x is Sensirion’s next generation miniature CO2 sensor that offers an unmatched price-to-performance ratio. This sensor builds on the photoacoustic sensing principle and Sensirion’s patented PASens® and CMOSens® technology to enable unmatched small sensor size combined with high performance. SMD compatibility and the small footprint allow cost- and space-effective integration of boost freedom of design for customers.

https://www.futureelectronics.com/npi/sensirion-scd4x-miniature-co2-sensor