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The Kelvin scale is an absolute temperature scale that starts at the lowest possible ... An ice water bath offered a practical calibration point for thermometers ...
These include helium vapor pressure thermometers, helium gas thermometers, standard platinum resistance thermometers (known as SPRTs) and monochromatic radiation thermometers. Although the Kelvin and Celsius temperature scales were (until 2019) defined using the triple point of water (273.16 K or 0.01 °C), it is impractical to use this ...
These include helium vapor pressure thermometers, helium gas thermometers, standard platinum resistance thermometers (known as SPRTs, PRTs or Platinum RTDs) and monochromatic radiation thermometers. Although the Kelvin and Celsius scales are defined using absolute zero (0 K) and the triple point of water (273.16 K and 0.01 °C), it is ...
Thermometers are calibrated in various temperature scales that historically have relied on various reference points and thermometric substances for definition. The most common scales are the Celsius scale with the unit symbol °C (formerly called centigrade ), the Fahrenheit scale (°F), and the Kelvin scale (K), with the third being used ...
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:
About – Thermometer Archived 2020-01-22 at the Wayback Machine – Thermometers – Early History, Anders Celsius, Gabriel Fahrenheit and Thomson Kelvin. Thermometers and Thermometric Liquids – Mercury and Alcohol. The NIST Industrial Thermometer Calibration Laboratory Archived 2016-07-22 at the Wayback Machine; Thermometry at the Nanoscale ...