The MG811 CO₂ Sensor is designed for detecting Carbon Dioxide (CO₂) concentration in the air. It is ideal for air quality monitoring systems, HVAC control, environmental sensing projects and smart building applications. With its high sensitivity to CO₂ and stable performance, this module is widely used in indoor air quality monitoring and research oriented projects. It can be integrated with Arduino, ESP32, Raspberry Pi (with ADC) and other microcontroller platforms. Highlights: Specifically designed for Carbon Dioxide (CO₂) detection. High sensitivity and good selectivity to CO₂. Analog voltage output. Built in signal conditioning circuit. Suitable for continuous air quality monitoring. Compatible with popular development boards. Specifications: Operating Voltage: 5V (sensor heating circuit). Signal Output Voltage: 0-2V (analog). Detectable Gas: Carbon Dioxide (CO₂). Detection Range: ~350-10,000 ppm. Preheat Time: 3-5 minutes recommended. Operating Temperature: -10°C to +50°C. Module Type: Electrochemical CO₂ sensor. Dimensions: ~33×20×34mm. Interface: 4-pin (VCC, GND, A0, D0). Ideal For: 🏠 Indoor air quality monitoring. 🏢 Smart buildings & HVAC systems. 🌍 IoT environmental monitoring stations. 🔬 University research projects. 🎓 Arduino & STEM education projects. Note: Product appearance may vary slightly from the images shown. Text or markings on the sensor may differ depending on the batch.
