CCM.D-K1.2023
MEASURAND Density
NOMINAL VALUE 2329 kg/m3
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in 10-3 kg/m3.
Enlarged graph
CCM.D-K1.2023
MEASURAND Volume
NOMINAL VALUE 430 cm3
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm3.
Enlarged graph
CCM.D-K1.2023
MEASURAND Density
NOMINAL VALUE 2329 kg/m3
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in 10-3 kg/m3.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
10-3 kg/m³ |
10-3 kg/m³ |
10-3 kg/m³ |
||
| PTB | -0.04 | 0.48 | ||
| METAS | 4.49 | 20.44 | ||
| NRC | -9.94 | 3.80 | ||
| NIM | 1.03 | 1.45 | ||
| CENAM | 3.17 | 8.19 | ||
| NMIJ | -0.21 | 0.54 | ||
| NIS | 15.10 | 10.11 | ||
| NMIA | -2.39 | 11.11 | ||
| UME | -0.90 | 3.97 | ||
| SASO-NMCC | 6.71 | 9.79 |
CCM.D-K1.2023
MEASURAND Volume
NOMINAL VALUE 430 cm3
Degrees of equivalence represented by Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mm3.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mm³ |
mm³ |
mm³ |
||
| PTB | 0.01 | 0.10 | ||
| METAS | -0.82 | 3.73 | ||
| NRC | 1.84 | 0.70 | ||
| NIM | -0.19 | 0.26 | ||
| CENAM | -0.60 | 1.50 | ||
| NMIJ | 0.05 | 0.11 | ||
| NIS | -2.50 | 2.06 | ||
| NMIA | 0.66 | 2.09 | ||
| UME | 0.14 | 0.79 | ||
| SASO-NMCC | -1.25 | 1.81 |
| Metrology area, Sub-field | Mass and related quantities, Density |
| Description | Density measurement of a silicon sphere |
| Time of measurements | 2022 - 2023 |
| Status | Approved for equivalence |
| Final Reports of the comparisons | |
| References | |
| Measurand | Density and volume |
| Parameters | Temperature: 20 °C Pressure: 101325 Pa |
| Transfer device | 1 kg sphere made of natural silicon |
| Comparison type | Key Comparison |
| Consultative Committee | CCM (Consultative Committee for Mass and Related Quantities) |
| Conducted by | CCM (Consultative Committee for Mass and Related Quantities) |
| Comments | Silicon sphere with a nominal density of 2329 kg/m³ by hydrostatic weighing. Results published 18 March 2026 |
| Pilot institute |
PTB
Physikalisch-Technische Bundesanstalt Germany |
| Contact person | Daniela Eppers +495315921820 |
| Additional |
| Pilot laboratory | |
|---|---|
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| CENAM |
Centro Nacional de Metrologia, Mexico, SIM |
| INRIM |
Istituto Nazionale di Ricerca Metrologica, Italy, EURAMET |
| METAS |
Federal Institute of Metrology, Switzerland, EURAMET |
| NIM |
National Institute of Metrology, China, APMP |
| NIS |
National Institute for Standards, Egypt, AFRIMETS |
| NMIA |
National Measurement Institute, Australia, Australia, APMP |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| NRC |
National Research Council, Canada, SIM |
| SASO-NMCC |
National Measurement and Calibration Center - Saudi Standards, Metrology and Quality Organization, Saudi Arabia, GULFMET |
| UME |
TÜBITAK Ulusal Metroloji Enstitüsü, Türkiye, EURAMET |
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CCM.D-K1.2023
MEASURAND Density
NOMINAL VALUE 2329 kg/m3
The key comparison reference value xR and its associated standard uncertainty uR are computed from the weighted mean of the reported results, with NRC and NIS excluded as described in Section 8 of the CCM.D-K1.2023 Final report.
xR = 2329.082 94 kg/m3 uR = 0.000 23 kg/m3
The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in 10-3 kg/m3:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = 2 (ui2 - uR2)1/2.
CCM.D-K1.2023
MEASURAND Volume
NOMINAL VALUE 430 cm3
The key comparison reference value xR and its associated standard uncertainty uR are computed from the weighted mean of the reported results, with NRC and NIS excluded as described in Section 8 of the CCM.D-K1.2023 Final report.
xR = 429.366 664 cm3 uR = 0.000 045 cm3
The degree of equivalence of laboratory i relative to the key comparison reference value xR is given by a pair of terms, both expressed in mm3:
Di = (xi - xR) and its expanded uncertainty Ui at a 95 % level of confidence where Ui = 2 (ui2 - uR2)1/2.
CCM.D-K1.2023
MEASURAND Density
NOMINAL VALUE 2329 kg/m3
xi measurement result reported by laboratory i, Labi
ui combined standard uncertainty of xi
| Labi | xi | ui | |
| kg/m³ | kg/m³ | ||
| PTB | 2329.0829 | 0.0003 | |
| METAS | 2329.0874 | 0.0102 | |
| NRC | 2329.0730 | 0.0019 | |
| NIM | 2329.0840 | 0.0008 | |
| CENAM | 2329.0861 | 0.0041 | |
| NMIJ | 2329.0827 | 0.0004 | |
| NIS | 2329.0980 | 0.0050 | |
| NMIA | 2329.0805 | 0.0056 | |
| UME | 2329.0820 | 0.0020 | |
| SASO-NMCC | 2329.0896 | 0.0049 |
CCM.D-K1.2023
MEASURAND Volume
NOMINAL VALUE 430 cm3
xi measurement result reported by laboratory i, Labi
ui combined standard uncertainty of xi
| Labi | xi | ui | |
| cm³ | cm³ | ||
| PTB | 429.366677 | 0.000066 | |
| METAS | 429.365848 | 0.001864 | |
| NRC | 429.368505 | 0.000348 | |
| NIM | 429.366472 | 0.000136 | |
| CENAM | 429.366060 | 0.000750 | |
| NMIJ | 429.366711 | 0.000072 | |
| NIS | 429.364162 | 0.001030 | |
| NMIA | 429.367324 | 0.001048 | |
| UME | 429.366800 | 0.000400 | |
| SASO-NMCC | 429.365412 | 0.000904 |
