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  2. Infrared thermometer - Wikipedia

    en.wikipedia.org/wiki/Infrared_thermometer

    The most common infrared thermometer is the spot infrared pyrometer or infrared pyrometer, which measures the temperature at a spot on a surface (actually a relatively small area determined by the D:S ratio). These usually project a visible red dot onto the center of the area being measured that identifies the spot being measured, but plays no ...

  3. Pyrometer - Wikipedia

    en.wikipedia.org/wiki/Pyrometer

    The current through the filament was adjusted until it was of the same colour (and hence temperature) as the object, and no longer visible; it was calibrated to allow temperature to be inferred from the current. [10] The temperature returned by the vanishing-filament pyrometer and others of its kind, called brightness pyrometers, is dependent ...

  4. Thermopile - Wikipedia

    en.wikipedia.org/wiki/Thermopile

    Thermopiles are used to provide an output in response to temperature as part of a temperature measuring device, such as the infrared thermometers widely used by medical professionals to measure body temperature, or in thermal accelerometers to measure the temperature profile inside the sealed cavity of the sensor. [4]

  5. Thermal remote sensing - Wikipedia

    en.wikipedia.org/wiki/Thermal_Remote_sensing

    Thermal Infrared Image by Mars Odyssey's thermal emission imaging system of Mars. Thermal remote sensing is a branch of remote sensing in the thermal infrared region of the electromagnetic spectrum. [1] Thermal radiation from ground objects is measured using a thermal band in satellite sensors. [2]

  6. Occupancy sensor - Wikipedia

    en.wikipedia.org/wiki/Occupancy_sensor

    Occupancy sensor types include: PIR sensors, which work on heat difference detection, measuring infrared radiation.Inside the device is a pyroelectric sensor which can detect the sudden presence of objects (such as humans) who radiate a temperature different from the temperature of the background, such as the room temperature of a wall.

  7. 10 most common eBay scams to look out for

    www.aol.com/article/finance/2020/09/23/10-most...

    According to eBay policy, if a buyer opens an Item Not as Discussed (INAD) ticket, then you must accept the return and refund the money. The buyer keeps the items and sends an empty box back ...

  8. Satellite temperature measurement - Wikipedia

    en.wikipedia.org/wiki/Satellite_temperature...

    Infrared radiation can be used to measure both the temperature of the surface (using "window" wavelengths to which the atmosphere is transparent), and the temperature of the atmosphere (using wavelengths for which the atmosphere is not transparent, or measuring cloud top temperatures in infrared windows).

  9. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    A PIR sensor can detect changes in the amount of infrared radiation impinging upon it, which varies depending on the temperature and surface characteristics of the objects in front of the sensor. [2] When an object, such as a person, passes in front of the background, such as a wall, the temperature at that point in the sensor's field of view ...

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