Measuring Instruments - History and Etymology

The following information responds to the principle questions asked by our clients. We hope that this paragraph will be useful to your technical directors as well as your after sales service. Certainly, we remain at your disposal for every information.



Voluminal mass HYDROMETER photo     from Greek : "HUDÔR" = water and "METRON" = measure    
An instrument of measurement which functions based on Archimede 's Principle. The reading is determined at the surface level of a liquid when the hydrometer floats freely. It is used for estimating the composition of a liquid or for preparing an identified liquid. Among all of the units of measurement, the voluminous mass is recommended by ISO.



Alcoholmeter photo      from Latin :"ALKO(HO)L" and from Arabic : "AL-KUHL" = pulverized antimony
     and from Greek : "METRON" = measure

Hydrometer measuring the alcohol content of liquids, specially calibrated for use with water/ethanol solutions. The official unit of measure is the % of Volume at 20 °C. Other less commonly used units exist: Tralles, Cartier, Gay-Lussac, Richter, which you will find, as well, in our website.



Saccharometer photo      from Latin : "SACCARUM" and from Greek : "SAKKHAROS" = sugar
     and from Greek : "METRON" = measure

Hydrometer used to determine or to measure the proportion of sugar concentration in a solution. It is graduated in % MASS or weight of sugar in a WATER/SUGAR solution.




Thermometer photo     from Greek : "THERMOS" = hot and "METRON" = measure    
Instrument which measures temperature. There are a large number of thermometers. The most simple rest on the fact that the substance dilates as the temperature increases : liquid filled thermometers (mercury derived from oil or alcohol), or gas filled thermometers (helium).
These thermometers are composed of a liquid-filled glass reservoir linked with a glass capillary tube. A variation in temperature provokes a variation in the volume of the liquid, interpreted by a rise or descent of the liquid column inside the   capillary.


     from Arabic : "QÂLIB" = form, mould
The set of operations which establish, under specified conditions, the relationship between values indicated by a measuring instrument, and the corresponding known values of a measurand.





Some names of interest ...

287 - 212 av. J.C. / B.C.
the most well-known physicist in history who notably determined the push that a surrounding fluid exerts on a solid.

1728 - 1804
French chemist, the basis on which was formed the graduated hydrometers in degrees Baumé. This unit of measure is no longer used in most countries today.

1701 - 1744
Swedish astronomist who made known the centesimal graduation of the thermometer.
Degree Celsius = °C.

1686 - 1736
Prussian physicist who gave his name to a scale of temperature. This scale is still used in Great Britain and North America. 0 °C corresponds to 32 °F and 100 °C corresponds to 212 °F. You will find a conversion table of °C / °F in our website (section:  CONVERSION TABLE)

1564 - 1642
Italian physicist, mathematician and astronomer, founder of experimental science and inventor of the Thermometer.

1778 - 1850
French physicist and chemist who discovered the law of expansion of gases which holds his name.

1683 - 1757
French physicist and chemist, inventor of the alcohol thermometer (around 1730). The Réaumur thermometric scale has been replaced by the Celsius scale.

Copyright © 2008 - Alla France - All rights reserved - Sitemap - Powered by Fictis