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The key components are an infrared source, a light tube, an interference (wavelength) filter, and an infrared detector. The gas is pumped or diffuses into the light tube, and the electronics measure the absorption of the characteristic wavelength of light. NDIR sensors are most often used for measuring carbon dioxide. [2]
Air travel amid COVID outbreaks can be unnerving but a carbon dioxide detector can help gauge risks. Here's what a CO2 detector showed on a flight.
Before the development of electronic household carbon monoxide detectors in the 1980s and 1990s, carbon monoxide presence was detected with a chemically infused paper that turned brown when exposed to the gas. Since then, many electronic technologies and devices have been developed to detect, monitor, and alert the leak of a wide array of gases.
Colorimetric capnography is a qualitative measurement method that detects the presence of carbon dioxide (CO2, a relatively acidic gas) in a given gaseous environment. From a medical perspective, the method is usually applied by exposing litmus paper/film to an environment containing a patient's airway gases (i.e. placing it into their breathing circuit/airway circuit), where it will then ...
Carbon monoxide (CO) and carbon dioxide (CO 2) are measured by non-dispersive infrared (NDIR) light absorption based on the Beer-Lambert law. [49] CO can also be measured using electrochemical gel sensors and metal-oxide semiconductor (MOS) detectors, which are used in household carbon monoxide detectors. [50]
Most carbon monoxide toxicity victims breathe in excessive levels of this invisible gas without even knowing, which is why homes should have carbon monoxide detectors installed.
The carbon monoxide concentration in exhaust gases is closely related, and almost proportional to the air fuel ratio in the rich regions. It is, therefore, of great value when tuning an engine. Carbon dioxide emitted is theoretically directly proportional to the fuel consumed at a given and constant air fuel ratio.
A carbon dioxide recorder (or CO 2 recorder) is a machine that can record the level of carbon dioxide at different times. It is more sophisticated than a carbon dioxide detector which only has to indicate the presence of carbon dioxide. There are three main types of carbon dioxide recorder: chemical, physical, and electrical.
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