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  2. Infrared thermometer - Wikipedia

    en.wikipedia.org/wiki/Infrared_thermometer

    A thermometer with a higher ratio of D to S is able to sense a more-specific, narrower surface at a greater distance than one with a lower ratio. A 12:1 rated device can sense a 1-inch circle at a distance of one foot, whereas a 10:1 ratio device achieves the same 1-inch circle at 10 inches, and a wider, less-specific circle of 1.2 inches at a ...

  3. Pyrometer - Wikipedia

    en.wikipedia.org/wiki/Pyrometer

    In the modern usage, it is a device that from a distance determines the temperature of a surface from the amount of the thermal radiation it emits, a process known as pyrometry, a type of radiometry. The word pyrometer comes from the Greek word for fire, "πῦρ" ( pyr ), and meter , meaning to measure.

  4. ASTM Subcommittee E20.02 on Radiation Thermometry

    en.wikipedia.org/wiki/ASTM_Subcommittee_E20.02...

    Target size test method; Response time test method; Warm-up time test method; Long-term drift test method; E2758-10 Standard Guide for Selection and Use of Wideband, Low Temperature Infrared Thermometers. E2847-11 Standard Practice for Calibration and Accuracy Verification of Wideband Infrared Thermometers

  5. Talk:Infrared thermometer - Wikipedia

    en.wikipedia.org/wiki/Talk:Infrared_thermometer

    Thus there is no need for the device to know its distance from the target. David.stuart.thompson 18:37, 3 March 2013 (UTC) It is commonly believed that these thermometers identify the peak in the black-body spectrum and so infer the temperature.

  6. Temperature measurement - Wikipedia

    en.wikipedia.org/wiki/Temperature_measurement

    Another type of thermometer that is not really used much in practice, but is important from a theoretical standpoint, is the gas thermometer. Other important devices for measuring temperature include: Thermocouples; Thermistors; Resistance temperature detector (RTD) Pyrometer; Langmuir probes (for electron temperature of a plasma) Infrared ...

  7. Thermometer - Wikipedia

    en.wikipedia.org/wiki/Thermometer

    A thermometer has two important elements: (1) a temperature sensor (e.g. the bulb of a mercury-in-glass thermometer or the pyrometric sensor in an infrared thermometer) in which some change occurs with a change in temperature; and (2) some means of converting this change into a numerical value (e.g. the visible scale that is marked on a mercury ...

  8. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    standing wave ratio Synthetic Aperture Radar: reflectivity and moisture tacheometer: distance tachometer: revolutions per minute, rate of blood flow, speed of aeroplanes taximeter: distance travelled, displacement tensiometer: surface tension of a liquid theodolite: angle, in the horizontal and vertical planes thermometer: temperature tiltmeter

  9. Minimum resolvable temperature difference - Wikipedia

    en.wikipedia.org/wiki/Minimum_resolvable...

    Minimum resolvable temperature difference (MRTD) is a measure for assessing the performance of infrared cameras, and is inversely proportional to the modulation transfer function. Typically, an operator is asked to assess the minimum temperature difference at which a 4-bar target can be resolved .

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