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  2. Mercury-in-glass thermometer - Wikipedia

    en.wikipedia.org/wiki/Mercury-in-glass_thermometer

    To avoid this, some weather services require that all mercury-in-glass thermometers be brought indoors when the temperature falls to −37 °C (−35 °F). To measure lower meteorological temperatures, a thermometer containing a mercury-thallium alloy which does not solidify until the temperature drops to −61.1 °C (−78.0 °F) may be used.

  3. Medical thermometer - Wikipedia

    en.wikipedia.org/wiki/Medical_thermometer

    A medical thermometer or clinical thermometer is a device used for measuring the body temperature of a human or other animal. The tip of the thermometer is inserted into the mouth under the tongue (oral or sub-lingual temperature), under the armpit (axillary temperature), into the rectum via the anus (rectal temperature), into the ear (tympanic temperature), or on the forehead (temporal ...

  4. Thermometer - Wikipedia

    en.wikipedia.org/wiki/Thermometer

    A thermometer is a device that measures temperature (the hotness or coldness of an object) or temperature gradient (the rates of change of temperature in space). 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 ...

  5. Temperature measurement - Wikipedia

    en.wikipedia.org/wiki/Temperature_measurement

    The first sealed thermometer was constructed in 1654 by the Grand Duke of Tuscany, Ferdinand II. [1]: 19 The development of today's thermometers and temperature scales began in the early 18th century, when Daniel Gabriel Fahrenheit produced a mercury thermometer and scale, both developed by Ole Christensen Rømer.

  6. Room temperature - Wikipedia

    en.wikipedia.org/wiki/Room_temperature

    Mercury-in-glass thermometer measuring an ambient temperature of 23 °C (73 °F) a little above the normal "room temperature" range. Room temperature, colloquially, denotes the range of air temperatures most people find comfortable indoors while dressed in typical clothing. Comfortable temperatures can be extended beyond this range depending on ...

  7. Alcohol thermometer - Wikipedia

    en.wikipedia.org/wiki/Alcohol_thermometer

    Ethanol-filled thermometer are used in preference to mercury for meteorological measurements of minimum temperatures and can be used down to −70 °C (−94 °F). [2] The physical limitation of the ability of a thermometer to measure low temperature is the freezing point of the liquid used. Ethanol freezes at −114.9 °C (−174.82 °F).

  8. Rectal thermometry - Wikipedia

    en.wikipedia.org/wiki/Rectal_thermometry

    The thermometer tip must then be left in place until a reading can be derived, usually about 3 minutes for mercury thermometers and 1 minute for newer electronic types. It is important to remember that the normal human core temperature range measured with a rectal thermometer spans from 37.0 to 38.0 degrees Celsius.

  9. Six's thermometer - Wikipedia

    en.wikipedia.org/wiki/Six's_thermometer

    Marker showing the maximum temperature. Mercury has retreated to about 26.5°C as the temperature has dropped below its maximum of about 28.3°C. The thermometer shows a reading at the top of the mercury section on both the maximum and minimum scales; this shows the current temperature and should be the same on both scales.