CIPM MRA COMPARISON REPORTS

This report presents the results of the key comparison EURAMET.M.D-K4.2020.1 (EURAMET Project No 1787) that covered the calibration of high-resolution hydrometers for liquid in the density range 1000 kg/m³ to 2000 kg/m³ at the reference temperature of 20 °C.

Two laboratories participated in this key comparison, INRIM (Italy) and IPQ (Portugal). The results were linked to the CIPM key comparison CCM.D-K4 comparison using the measurements from INRIM, acting as pilot laboratory, which participated in both comparisons. The measurement range of this comparison has been reduced to the range from 1000 kg/m³ to 2000 kg/m³, when comparing to the CCM.D-K4 comparison.

Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/.

The final report has been peer-reviewed and approved for publication by the CCM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).