Baumé scale: Difference between revisions
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== External links == |
== External links == |
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*[http://www.atago.net/usa/index.html ATAGO Baumé Refractometers] |
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refractometer for Baumé: |
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* [http://www.misco.com Refractometer Resource] |
* [http://www.misco.com Refractometer Resource] |
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Revision as of 17:24, 15 May 2006
A hydrometer scale developed by French pharmacist Antoine Baumé to measure density of various liquids. Notated variously as: degrees Baume, degrees Baumé; B°, Be°, Bé°, Baume.
The formula for deriving degrees Baumé is:
- liquids less dense than water: sp. gr. = 140/(°Bé + 130)
- liquids more dense than water: sp. gr. = 145/(145 - °Bé)
Originally the scale was based on salinity of water and brine. Because of vague instructions or errors in translation a large margin of error was introduced when the scale was adopted. The API gravity scale is a result of adapting to the subsequent errors from the Baumé scale. The Baumé scale is related to the Balling, Brix, Plato and 'specific gravity times 1000' scales. The Baumé scale is sometimes used by US brewers.
It is far easier to measure Baume using a temperature compensated refractometer than with the specific gravity method since the refractometer requires only a couple of drops of fluid and automaticaly compensates for temperature.