Calibrated hydrometers
and thermohydrometers are available from Koehler with an ISO/IEC 17025
and ANSI/NCSL Z-540-1 Report of Calibration.
When inquiring about calibrated hydrometers and
thermohydrometers, please refer to the catalog number for the
corresponding hydrometer or thermohydrometer and replace the middle
three zeros in the catalog number with 004. Example: 251-000-01H API
Gravity Hydrometer would be 251-004-01H Certified API Gravity
Hydrometer.
Specifications
Conforming to the specifications of: ASTM E100
Applicable Test Method Standards
ASTM D287, D1298, D6074, D6158; API MPMS Chapter 9.1; IP 160; ISO 3675; DIN 51757