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A carbon dioxide sensor or CO 2 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.
A nondispersive infrared sensor (or NDIR sensor) is a simple spectroscopic sensor often used as a gas detector.It is non-dispersive in the fact that no dispersive element (e.g a prism or diffraction grating as is often present in other spectrometers) is used to separate out (like a monochromator) the broadband light into a narrow spectrum suitable for gas sensing.
Carbon dioxide sensor; Carbon monoxide detector; Catalytic bead sensor; Chemical field-effect transistor; Chemiresistor; Electrochemical gas sensor; Electronic nose; Electrolyte–insulator–semiconductor sensor; Energy-dispersive X-ray spectroscopy; Fluorescent chloride sensors; Holographic sensor; Hydrocarbon dew point analyzer; Hydrogen ...
Infrared point sensors can be used to detect hydrocarbons [7] and other infrared active gases such as water vapor and carbon dioxide. IR sensors are commonly found in waste-water treatment facilities, refineries, gas turbines, chemical plants, and other facilities where flammable gases are present and the possibility of an explosion exists.
Sensors are most often used for measuring carbon monoxide. [4] The best of these have sensitivities of 20–50 PPM. [4] Most CO sensors are fully calibrated prior to shipping from the factory. Over time, the zero point of the sensor needs to be calibrated to maintain the long term stability of the sensor. [5]
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