Reversing thermometer

Unlike most conventional mercury thermometers, a reversing thermometer is able to record a given temperature to be viewed at a later time. If the thermometer is flipped upside down, the current temperature will be shown until it is turned upright again. This was the primary device used by oceanographers to determine water temperatures below the surface of the ocean from around 1900 to 1970.

It consists of a conventional bulb connected to a capillary in which a constriction is placed so that upon reversal the mercury column breaks off in a reproducible manner. The mercury runs down into a smaller bulb at the other end of the capillary, which is graduated to read temperature. A 360° turn in a locally widened portion of the capillary serves as a trap to prevent further addition of mercury if the thermometer is warmed and the mercury expands past the break-off point. The remote-reading potentialities of reversing thermometers make them particularly suitable for use in measuring subsea temperature as a function of pressure. In this application, both protected thermometers and unprotected thermometers are used, each of which is provided with an auxiliary thermometer. They are generally used in pairs in Nansen bottles. They are usually read to 0.01°C, and after the proper corrections have been applied, their readings are considered reliable to 0.02°C.

External links

* [http://oceanworld.tamu.edu/resources/ocng_textbook/contents.html "Introduction to Physical Oceanography" by Robert H. Stewart] (Open Source Textbook)

* [http://amsglossary.allenpress.com/glossary/search?id=reversing-thermometer1 Glossary of Meteorology(American Meteorological Society)]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • reversing thermometer — gelminis termometras statusas T sritis Standartizacija ir metrologija apibrėžtis Termometras temperatūrai įvairiame vandens telkinių gylyje matuoti. atitikmenys: angl. reversing thermometer; sea water thermometer vok. Tiefenthermometer, n;… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • reversing thermometer — gelminis termometras statusas T sritis fizika atitikmenys: angl. reversing thermometer; sea water thermometer vok. Tiefenthermometer, n; Tiefseekippthermometer, n; Tiefwasserthermometer, n rus. глубинный термометр, m; глубоководный термометр, m;… …   Fizikos terminų žodynas

  • reversing thermometer — noun a thermometer that registers the temperature in deep waters • Hypernyms: ↑thermometer * * * noun : a thermometer for registering temperature in deep water by means of the breaking of a column of mercury when the thermometer inverts at a… …   Useful english dictionary

  • Thermometer — A clinical mercury in glass thermometer …   Wikipedia

  • sea-water thermometer — gelminis termometras statusas T sritis Standartizacija ir metrologija apibrėžtis Termometras temperatūrai įvairiame vandens telkinių gylyje matuoti. atitikmenys: angl. reversing thermometer; sea water thermometer vok. Tiefenthermometer, n;… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • sea-water thermometer — gelminis termometras statusas T sritis fizika atitikmenys: angl. reversing thermometer; sea water thermometer vok. Tiefenthermometer, n; Tiefseekippthermometer, n; Tiefwasserthermometer, n rus. глубинный термометр, m; глубоководный термометр, m;… …   Fizikos terminų žodynas

  • Mercury-in-glass thermometer — Closeup of a maximum thermometer. The break in the column of mercury is visible. A mercury in glass thermometer, also known as a mercury thermometer, was invented by German physicist Daniel Gabriel Fahrenheit in 1724 and is a thermometer… …   Wikipedia

  • Nansen bottle — Pettersen Nansen Bottle A U.S. Coast Guard sailor holding a Na …   Wikipedia

  • undersea exploration — Introduction       the investigation and description of the ocean waters and the seafloor and of the Earth beneath. Primary objectives and accomplishments       Included in the scope of undersea exploration are the physical and chemical… …   Universalium

  • Tiefenthermometer — gelminis termometras statusas T sritis Standartizacija ir metrologija apibrėžtis Termometras temperatūrai įvairiame vandens telkinių gylyje matuoti. atitikmenys: angl. reversing thermometer; sea water thermometer vok. Tiefenthermometer, n;… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.