CO2 Sensor (Arduino compatible)

Gravity: Analog Electrochemical Carbon Dioxide Sensor (0-10000 ppm) - DFRobot

Adafruit SCD-40 - True CO2, Temperature and Humidity Sensor (STEMMA QT / Qwiic)

Arduino CCS811 - CO2 & tVOC - Air Quality Monitor

Gravity: Analog Electrochemical Carbon Dioxide Sensor (0-10000 ppm) - DFRobot

Fet47vehicle & Rc Toys Co2 Sensor Module - I2c, Temperature, Humidity, Nac1 Compatible

CO₂ sensor - Open Source Building Science Sensors

DFROBOT Gravity: Analog CO2 Gas Sensor : Industrial & Scientific

Gravity Analog Infrared CO2 Sensor for Arduino - RobotShop

The Gravity: I2C Oxygen Sensor is based on electrochemical principles and it can measure the ambient O2 concentration accurately and conveniently.

Gravity: I2C Oxygen Sensor

Gravity: UART Non-dispersive Infrared Carbon Dioxide Sensor (0-50000 ppm) - DFRobot

CO2 Sensor (Arduino compatible), DFRobot SEN0159

DFRobot released its latest wide range Arduino infrared CO2 sensor, which effective range is up to 0~50000ppm. This sensor is based on non-dispersive

Gravity: UART Infrared CO2 Sensor (0-50000ppm)