Hydrometer: nm A hydrometer is a graduated glass or metal device * used to measure the density of a liquid and the concentration of a solution. The operation of the instrument is based on Archimedes' principle. Thus, the Baumé hydrometer is used to calculate the weight of sugar contained in the must, and to assess the alcoholic degree that the wine will have after fermentation.
The use of the hydrometer is accompanied by that of a thermometer because the density of the must varies according to ...
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