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6604-4
Specific Gravity, also known as relative density, is the ratio of the mass of a solid or liquid to be mass of an equal volume of distilled water. The standard temperature of calibration in the U.S. is 60°F / 60°F. All our Bellwether Specific Gravity Hydrometers listed are calibrated at 60°F / 60°F. Bellwether Hydrometer Catalog
Specific Gravity = Mass of X at 60°F ÷ Mass of Distilled water at 60°F
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