The MG811 is a CO2 (carbon dioxide) sensor module that is used to measure the concentration of CO2 in the air. The module consists of a CO2 sensor, an amplifier circuit, and a voltage output circuit. The CO2 sensor is a solid-state electrochemical device that generates a voltage proportional to the CO2 concentration in the air. The amplifier circuit amplifies this voltage, and the output circuit provides a voltage signal that can be read by a microcontroller or other electronic device.

The MG811 is a highly sensitive and accurate sensor that can measure CO2 concentrations in the range of 0 to 10,000 ppm (parts per million). It is commonly used in air quality monitoring applications, such as indoor air quality monitoring, greenhouses, and HVAC systems.

The MG811 is easy to interface with microcontrollers and other electronic devices, and it requires only a simple power supply and a load resistor to operate. It is also small and lightweight, making it suitable for use in portable and handheld devices.

Features:

Good sensitivity and selectivity to CO2
Low humidity and temperature dependency
Long stability and reproducibility
Application
Air Quality Control
Ferment Process Control
Room Temperature CO2 concentration Detection