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A carbon dioxide sensor or CO2 sensor is an instrument for the measurement of carbon dioxide gas. The most common principles for CO 2 sensors are infrared gas sensors (NDIR) and chemical gas sensors. Measuring carbon dioxide is important in monitoring indoor air quality, [ 1 ] the function of the lungs in the form of a capnograph device, and ...
Carbon dioxide and nitrogen dioxide sensors at Birmingham New Street train station. Carbon monoxide (CO) and carbon dioxide (CO 2) are measured by non-dispersive infrared (NDIR) light absorption based on the Beer-Lambert law. [47] CO can also be measured using electrochemical gel sensors and metal-oxide semiconductor (MOS) detectors. [48]
Oxygen sensor. An oxygen sensor (or lambda sensor, where lambda refers to air–fuel equivalence ratio, usually denoted by λ) or probe or sond, is an electronic device that measures the proportion of oxygen (O 2) in the gas or liquid being analyzed. It was developed by Robert Bosch GmbH during the late 1960s under the supervision of Günter ...
Sensors for carbon dioxide are an example of this approach and they have been commercially available for several years. Cross-sensitivity of electronic chemical sensors may also be utilized to design chemical sensor arrays , which utilize a variety of specific sensors that are cross-reactive for fingerprint detection of target gases in complex ...
Instead of setting throughput at a fixed air replacement rate, carbon dioxide sensors are used to control the rate dynamically, based on the emissions of actual building occupants. One way of quantitatively ensuring the health of indoor air is by the frequency of effective turnover of interior air by replacement with outside air.
Carbon dioxide levels measured in a space are commonly used to control DCV systems because CO 2 level is generally proportional to the level of bioeffluents, or occupant generated pollutants, in a space. [4] Carbon dioxide sensors monitor carbon dioxide levels in a space by strategic placement.
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