- NIST Traceable
- Temperature of Standardization 60°F/60°F
- Metal Ballast
- Individually Serialized
For liquids heavier than water, each hydrometer is calibrated in our triple accredited ISO/IEC 17025:2005, A2LA accredited laboratory against equipment whose calibration is traceable to NIST. Individually packaged with a multi-language Statement of Accuracy indicating accuracy traceable to NIST.