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The carbon dioxide gas sensor measures gaseous carbon dioxide levels by detecting the quantity of IR radiation absorbed by carbon dioxide molecules. The sensor employs a hot metal filament that acts as an IR source to generate IR radiation. The IR source is located at one end of a sensor tube, and another end is provided with an IR sensor.
/ APPLICATION NOTE How to Measure Carbon Dioxide Carbon dioxide measurement is required in many applications from building automation and greenhouses to life science and safety.uch gases are detectable using IR techniques. Water vapor, methane, carbon dioxide, and carbon monoxide are examples of gases that can be measured with an IR sensor. Their characteristic absorption bands are shown in Figure 1.IR sensing is the most widely applied technology for CO 2 detection.