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  2. Daniel Gabriel Fahrenheit - Wikipedia

    en.wikipedia.org/wiki/Daniel_Gabriel_Fahrenheit

    [6]: 116 In 1708, Fahrenheit met with the mayor of Copenhagen and astronomer, Ole Rømer, and was introduced to Rømer's temperature scale and his methods for making thermometers. Rømer told Fahrenheit that demand for accurate thermometers was high. [8]: 4 The visit inspired Fahrenheit to try to improve his own offerings. [9]

  3. Fahrenheit - Wikipedia

    en.wikipedia.org/wiki/Fahrenheit

    Fahrenheit proposed his temperature scale in 1724, basing it on two reference points of temperature. In his initial scale (which is not the final Fahrenheit scale), the zero point was determined by placing the thermometer in "a mixture of ice , water, and salis Armoniaci [ note 1 ] [transl. ammonium chloride ] or even sea salt". [ 11 ]

  4. Timeline of temperature and pressure measurement technology

    en.wikipedia.org/wiki/Timeline_of_temperature...

    1709 — Daniel Gabriel Fahrenheit constructed alcohol thermometers which were reproducible (i.e. two would give the same temperature) 1714 — Daniel Gabriel Fahrenheit invents the mercury-in-glass thermometer giving much greater precision (4 x that of Rømer). Using Rømer's zero point and an upper point of blood temperature, he adjusted the ...

  5. 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 ...

  6. Meteorological instrumentation - Wikipedia

    en.wikipedia.org/wiki/Meteorological_instrumentation

    In 1714, Gabriel Fahrenheit creates a reliable scale for measuring temperature with a mercury-type thermometer. [2] In 1742, Anders Celsius, a Swedish astronomer, proposed the 'centigrade' temperature scale, the predecessor of the current Celsius scale. [3] In 1783, the first hair hygrometer is demonstrated by Horace-Bénédict de Saussure.

  7. Temperature measurement - Wikipedia

    en.wikipedia.org/wiki/Temperature_measurement

    Such thermometers are usually calibrated so that one can read the temperature simply by observing the level of the fluid in the thermometer. 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:

  8. Scale of temperature - Wikipedia

    en.wikipedia.org/wiki/Scale_of_temperature

    Such temperature scales that are purely based on measurement are called empirical temperature scales. The second law of thermodynamics provides a fundamental, natural definition of thermodynamic temperature starting with a null point of absolute zero. A scale for thermodynamic temperature is established similarly to the empirical temperature ...

  9. Six's thermometer - Wikipedia

    en.wikipedia.org/wiki/Six's_thermometer

    A maximum–minimum thermometer. The scales are Fahrenheit on the inside of the U and Celsius on the outside. The current temperature is 23 degrees Celsius, the maximum recorded is 25, and the minimum is 15; both read from the base of the small markers in each arm of the U tube. The bulbs are hidden by a plastic housing.

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