MG811 Module, Air Carbon Dioxide/CO2 Sensor

The MG811 CO2 Sensor measures gaseous carbon dioxide levels by monitoring the amount of infrared (IR) radiation absorbed by carbon dioxide molecules. It uses a Metal Oxide Sensor that requires heating to separate CO2 from the air.

Infrared (IR) Radiation Absorption

Metal Oxide Sensor

• Expose To Extreme Conditions: Avoid exposing the sensor to extreme environmental conditions that could damage the sensor or affect its readings.,
• Overload Power Supply: Do not supply more than the recommended voltage of 6V to prevent damage to the sensor.

• Use Correct Voltage: Ensure to supply the sensor with a 6V power source, such as a 4 AA battery holder.,
• Calibrate The Sensor: Adjust the onboard potentiometer to set the digital output threshold for accurate detection levels.,
• Check Compatibility: Verify compatibility with microcontrollers like Arduino and Raspberry Pi, and use an Analog to Digital Converter Chip for Raspberry Pi.

• Temperature Range: Specific range not provided, but avoid extreme temperatures.

• Maximum: 6V

• Vcc: Connect to 6V power supply.,
• Aout: Connect to an analog input pin on Arduino to read CO2 levels.,
• Dout: Connect to a digital pin on Arduino; goes HIGH when CO2 level crosses the threshold set by the potentiometer.,
• Gnd: Connect to the ground on Arduino.

• Description: Connect the LCD display to Arduino to display the CO2 levels read from the AOUT pin of the sensor.

29 mm

32 mm

4 × 3 × 4 cm

0.015 kg

10 g

22 mm