Carbon Dioxide CO2 Sensor (Arduino & Raspberry Pi Compatible)
Monitor CO2 with your Raspberry Pi · Simplepush
Arduino Raspberry Pi microcontrollers CO2 Sensor detector Carbon Dioxide module UART Infrared 0-50000ppm Genuino 101 - AliExpress
Adafruit SCD-30 - NDIR CO2 Temperature and Humidity Sensor [STEMMA QT / Qwiic] : ID 4867 : $58.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Grove - CO2 Sensor | Seeed Studio Wiki
Senseair K30 CO2 meter - ESPHome - Home Assistant Community
Monitoring my home's air quality (CO2, PM2.5, Temp/Humidity) with AirGradient's DIY sensor | Jeff Geerling