Specific Gravity, also known as relative density, is the ratio of the mass of a solid or liquid to the mass of an equal volume of distilled water. The standard temperature of calibration in the U .S. is 60°F/ 60°F. All Bellwether Specific Gravity Hydrometers listed are calibrated at 60°F/ 60°F.
VEEGEE Model No : 6604-1,6604-2,6604-3,6604-4,6604-5
