MG811 Air Carbon Dioxide (CO2) Sensor Module

MG811 Air Carbon Dioxide (CO2) Sensor Module 

The MG811 CO? Sensor Module is an electrochemical gas sensor designed to detect and measure carbon dioxide (CO?) concentration in the air. It operates based on a solid electrolyte and produces an analog output that varies with CO? levels. The sensor requires a stable power supply and proper warm-up time to deliver reliable readings. Due to its sensitivity and relatively wide detection range, the MG811 is widely used in indoor air quality monitoring, environmental sensing, and HVAC systems.

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Features

• Detects carbon dioxide (CO?) concentrations in air
• Analog output proportional to CO? level
• High sensitivity with measurable response over a useful range
• Stable and repeatable performance with proper conditioning
• Long service life when used within specification
• Suitable for indoor air quality sensing
• Standard interface for analog signal measurement (ADC required)
• Relatively low cost for CO? sensing applications

Typical Applications

• Indoor air quality monitoring (homes, offices, classrooms)
• Greenhouse CO? control and plant growth systems
• HVAC ventilation control and demand-controlled ventilation
• Environmental and pollution monitoring
• Smart home air quality alerts
• Portable CO? measurement devices
• Educational and hobbyist electronics projects
• Embedded and IoT environmental sensor systems