Carbon Dioxide Detector Controls Indoor Carbon Dioxide Concentration
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It is generally believed that the concentration of carbon dioxide is one of the office and home air quality indicators, which can tell people whether they need ventilation. The CO2 detector described in this article not only displays the CO2 concentration level, but also compares the measured value with a preset threshold and triggers the relay when the limit is exceeded, thereby controlling the power peripherals such as the ventilation fan or the ventilation system to start working.
The best carbon dioxide detector carbon dioxide measurement device at present is a sensor made using a non-dispersive infrared absorption method. The application is mainly based on the absorption of carbon dioxide to the infrared wavelength of 4270 nm. The sensor measures the partial pressure of carbon dioxide in the air with high precision, especially the exact concentration of carbon dioxide at high concentrations.
If the carbon dioxide detector measures a lower concentration of carbon dioxide, it requires a longer optical path and requires a larger area sensor. Due to the high precision of the optics, the cost is very high. The wet electrolysis type carbon dioxide sensor is generally not a preferred sensor because of its stability and short life. Due to the poor stability and reproducibility of the gas-type CO2 sensor, the output is easily affected by environmental humidity, temperature, and dust, which also hinders its large-scale application.