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The Baumé scale is a pair of hydrometer scales developed by French pharmacist Antoine Baumé in 1768 to measure density of various liquids. Notated variously as degrees Baume, degrees Baumé; B°, Be°, Bé°, Baume. One scale measures the density of liquids heavier than water and the other, liquids lighter than water. The Baumé of plain water would be 0.

Contents

Conversions

At 20 °C, the relationship between specific gravity (s.g.) (relative density) and degrees Baumé is

  • For liquids denser than water: s.g. = 145 ÷ (145 - degrees Baumé);
  • For liquids less dense than water: s.g. = 140 ÷ (degrees Baumé + 130).

An older version of the scale for liquids heavier than water, at a reference temperature of 15.5 °C, uses 144.32 rather than 145.

Definitions

Baumé degrees (heavy) originally represented the percent by mass of sodium chloride in water at 60 degrees Fahrenheit (15.5 °C). Baumé degrees (light) was calibrated with 0°Bé (light) being the density of 10% NaCl in water by mass and 10°Bé (light) set to the density of water.

Other scales

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.

Use

Before standardization on specific gravity around the time of World War II the Baumé scale was generally used in industrial chemistry and pharmacology for the measurement of density of liquids. Today the Baumé scale is still used in various industries such as brewing, sugar beet processing and winemaking.

See also

References

Further reading

  • Boulton, Roger; Vernon Singleton, Linda Bisson, Ralph Kunkee (1996). Principles and Practices of Winemaking. Chapman & Hall.   ISBN 0-412-06411-1
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Wiktionary

Up to date as of January 15, 2010

Definition from Wiktionary, a free dictionary

Contents

English

Etymology

From the name of French pharmacist and chemist Antoine Baumé (1724-1804)

Noun

Singular
Baumé scale

Plural
uncountable

Baumé scale (uncountable)

  1. The original scale used on the Baumé type of densimeter to quantify the density of liquids.

Translations

See also


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