MG811 Gas Sensor (Carbon Dioxide Detection)

The MG811 Gas Sensor is a high-performance sensor for detecting carbon dioxide (CO₂) concentrations. Unlike typical MQ-series sensors, it uses a solid electrolyte technology that provides better selectivity for CO₂. It is widely used in HVAC systems, indoor air quality monitoring, greenhouses, and environmental control systems. The sensor requires proper signal conditioning due to its low output voltage but offers reliable and accurate CO₂ detection.

$40.00

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All MQ sensors use SnO₂ semiconductor technology with resistance varying according to gas concentration.
Typical detection ranges: 10 ppm to 10,000 ppm depending on the gas type.
Require preheating (20–60 seconds or more) for stable readings.
Provide analog output + digital threshold output (via comparator board).

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