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A CO2 gas detector uses a carbon dioxide sensor to measure the CO2 levels in the air and sends a signal to a control or display.

Arduino source code and application notes to connect the Uno, Mega or Mega2560 microcontrollers with many of the most popular CO2 sensors.

CO2 Monitoring Systems have 2 parts. Each need to be installed differently. Here's what you need to know.

Reliable carbon dioxide and oxygen measurement and control is critical in many applications. When comparing gas measurement devices, vendors use the terms "diffusion sensor" or "sampling sensor" to differentiate between the two major uses of gas sensors. Having a general understanding of these terms can help you better evaluate which sensor is right for your application. Diffusion – Measurement for Environment From indoor air quality to plant growth to personal safety: all of these involve people and areas where gases are diffused in ambient air. In other words, the sensor measures the gas concentrations diffused around it. Since the sensor...

Low-Cost Indoor Air Quality Monitor used by a church to measure CO2 levels for their occupants.