Hydrometer, Specific Gravity 1.300 to 1.350, ASTM 131H
Manufacturer: Vee Gee Scientific
Calibrated at 60°F General Specifications for VEE GEE® ASTM Hydrometers: Manufactured in strict accordance to specifications of ASTM (American Society for Testing and Materials) for accuracy and design. All instruments are suitable for certification for use as a primary reference standard with NIST traceability. 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 VEE GEE® Specific Gravity Hydrometers listed are calibrated at 60°F/ 60°F.