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  2. Carbon dioxide sensor - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide_sensor

    NDIR sensors are most often used for measuring carbon dioxide. [2] The best of these have sensitivities of 20–50 PPM. [2] Typical NDIR sensors cost in the (US) $100 to $1000 range. NDIR CO 2 sensors are also used for dissolved CO 2 for applications such as beverage carbonation, pharmaceutical fermentation and CO 2 sequestration applications.

  3. Carbon dioxide recorder - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide_recorder

    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.

  4. Gas detector - Wikipedia

    en.wikipedia.org/wiki/Gas_detector

    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.

  5. Nondispersive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Nondispersive_infrared_sensor

    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.

  6. Air pollution measurement - Wikipedia

    en.wikipedia.org/wiki/Air_pollution_measurement

    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]

  7. Smoke detector - Wikipedia

    en.wikipedia.org/wiki/Smoke_detector

    Smoke detector mounted on a ceiling. A smoke detector is a device that senses smoke, typically as an indicator of fire.Smoke detectors/alarms are usually housed in plastic enclosures, typically shaped like a disk about 125 millimetres (5 in) in diameter and 25 millimetres (1 in) thick, but shape and size vary.

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