DFRobot Gravity MG-811 CO2 Gas Sensor – 5V Analog Output

The DFRobot Gravity MG-811 CO2 Gas Sensor is an analog gas detection module designed for measuring carbon dioxide concentration in air. Based on the MG-811 solid electrolyte sensing element, it provides stable analog voltage output and operates at 5V with an onboard heating circuit for reliable performance. The Gravity interface ensures easy integration with Arduino and other 5V microcontrollers. Suitable for indoor air quality monitoring, HVAC systems, and environmental sensing applications.

• MG-811 solid electrolyte CO2 sensing element
  
• 5V DC operating voltage
  
• Gravity analog interface
  
• Analog voltage output proportional to CO2 level
  
• Onboard heating circuit for sensor stability
  
• Digital output with adjustable threshold
  
• High-quality Gravity connector
  
• Immersion gold PCB surface finish
  
• Compact 32 × 42 mm module size
  
• Compatible with Arduino and 5V controllers
  
• Suitable for indoor air quality monitoring
  
• Designed for continuous operation environments

• Operating Voltage: 5V DC
  
• Interface Type: Gravity Analog
  
• Analog Output: 0–3V (typical)
  
• Digital Output: TTL level
  
• Sensing Gas: Carbon Dioxide CO2
  
• Sensor Type: MG-811 Solid Electrolyte
  
• Heating Method: Onboard heating circuit
  
• Response Time: ≤ 60 s
  
• Operating Temperature: 0°C to 50°C
  
• Operating Humidity: ≤ 95% RH (non-condensing)
  
• PCB Surface Finish: Immersion Gold
  
• Module Size: 32 × 42 mm
  

• Product Wiki
• Schematic
• Layout
• MG811 datasheet

• Tutorial: How to use Mg811 Co2 Carbon Dioxide Gas Sensor, 100% Work, measure PPM, Code Library Given