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Balling hydrometer scale

A hydrometer scale calibrated so that readings at a specified temperature (in the United States, usually 20°C) equal the percentage by weight of sugar in the solution. It is numerically equivalent to the Brix scale, but is chiefly used by brewers, whereas the Brix scale is used by sugar refineries and vintners. The Brix scale is also known as the Plato scale.