Ultra Precision Specific Gravity Hydrometers
Ultra Precision Specific Gravity Scale measures the ration 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 Specific Gravity Hydrometers listed are calibrated at 60°F/60°F.
General Specifications for ASTM Hydrometers: Manufactured in strict accordance to specifications for 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.