Description

MG811 CO2 Sensor Module 0-2V Analog & TTL Output | Temperature Compensated Carbon Dioxide Detector for Air Quality Monitoring

Monitor carbon dioxide levels accurately with the MG811 CO2 Sensor Module, a reliable carbon dioxide detector designed for air quality monitoring, environmental sensing, smart home automation, greenhouse systems, industrial applications, and Arduino projects. Featuring both 0-2V analog output and TTL digital output, this module makes it easy to integrate CO2 detection into a wide range of electronic systems.

The MG811 sensor is highly sensitive to carbon dioxide (CO2) while offering good selectivity and reduced sensitivity to interfering gases such as alcohol and carbon monoxide. Its onboard signal conditioning and temperature compensation circuitry help provide more stable readings in varying environmental conditions.

 

 

Key Features

• MG811 Carbon Dioxide Sensor
• 0-2V Analog Output (selectable versions may support 0-4V)
• TTL Digital Output
• Temperature Compensated Design
• High Sensitivity to CO2 Gas
• Fast Response and Recovery Time
• Good Selectivity with Reduced Interference
• Onboard Signal Amplification Circuit
• Long Service Life and Stable Performance
• Suitable for Arduino, ESP32, Raspberry Pi and DIY Electronics
• Easy Integration for Air Quality Monitoring Projects

Technical Specifications

• Sensor Model: MG811
• Gas Detected: Carbon Dioxide (CO2)
• Detection Range: 0 – 10,000 PPM CO2
• Operating Voltage: DC 6V
• Output Type: Analog Output + TTL Digital Output
• Analog Output: 0-2V (some versions selectable to 0-4V)
• Digital Output: TTL Level Signal
• Signal Processing IC: LM393
• Response Characteristics: Fast response and recovery
• Operating Use: Indoor and environmental CO2 monitoring
• Temperature Compensation: Supported
• Module Type: Carbon Dioxide Gas Detection Module

Specifications may vary slightly depending on module manufacturer version.

Applications

The MG811 CO2 Sensor Module is ideal for:

• Indoor air quality monitoring
• Smart home automation systems
• Greenhouse environmental control
• HVAC monitoring systems
• Industrial CO2 detection
• Environmental monitoring projects
• Arduino and ESP32 development
• Raspberry Pi sensor projects
• Biotechnology and laboratory experiments
• School and STEM learning projects

How the MG811 CO2 Sensor Works

The MG811 uses an electrochemical sensing principle to detect carbon dioxide concentration in the surrounding air. As CO2 levels increase, the output voltage changes, allowing microcontrollers and monitoring systems to estimate the gas concentration. The onboard amplifier and heating circuit help improve sensor stability and sensitivity.

Why Choose the MG811 CO2 Sensor Module?

If you need a cost-effective and reliable CO2 gas sensor for environmental monitoring or embedded electronics projects, the MG811 Carbon Dioxide Sensor Module offers excellent sensitivity, dual-output flexibility, and easy integration with popular development boards.