BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 100 kV
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
Data older than 15 years are no longer included for degrees of equivalence
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 135 kV
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
Data older than 15 years are no longer included for degrees of equivalence
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 180 kV
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
Data older than 15 years are no longer included for degrees of equivalence
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 250 kV
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
Data older than 15 years are no longer included for degrees of equivalence
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 100 kV
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mGy/Gy |
mGy/Gy |
mGy/Gy |
||
| PTB | 2.7 | 5.2 | ||
| ENEA | 3.9 | 6.2 | ||
| BEV | 3.2 | 6.4 | ||
| NRC | 3.1 | 6.6 | ||
| NMIJ | -0.8 | 6.2 | ||
| VSL | -1.0 | 6.4 | ||
| NIST | -2.2 | 7.8 | ||
| NIM | 7.2 | 6.2 | ||
| NPL | 0.4 | 6.8 | ||
| KRISS | 4.1 | 4.4 | ||
| LNE-LNHB | 0.5 | 7.6 | ||
| VNIIM | 0.5 | 3.8 | ||
| GUM | 6.9 | 6.0 | ||
| ARPANSA | 3.8 | 8.2 | ||
| BFKH | -5.4 | 6.2 | ||
| CNEA | -6.0 | 14.3 | ||
| LMNRI/IRD | -9.5 | 12.1 | ||
| ININ | -9.3 | 16.1 | ||
| BARC | 11.4 | 14.1 | ||
| PTKMR-BATAN | 0.9 | 13.1 | ||
| INER | 2.1 | 10.1 | ||
| LNMRI/IRD | 1.4 | 9.8 | ||
| NMISA | -2.2 | 9.1 | ||
| NIS | 4.6 | 15.9 | ||
| Nuclear Malaysia | -1.9 | 12.1 |
Data older than 15 years are no longer included for degrees of equivalence
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 135 kV
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mGy/Gy |
mGy/Gy |
mGy/Gy |
||
| PTB | 4.5 | 5.2 | ||
| ENEA | 4.2 | 6.2 | ||
| BEV | 4.7 | 6.4 | ||
| NRC | 2.3 | 6.6 | ||
| NMIJ | -1.4 | 6.2 | ||
| VSL | -0.4 | 6.4 | ||
| NIST | -3.3 | 7.8 | ||
| NIM | 5.4 | 6.2 | ||
| NPL | 0.0 | 6.8 | ||
| KRISS | 5.1 | 4.4 | ||
| LNE-LNHB | -0.5 | 7.6 | ||
| VNIIM | 1.0 | 3.8 | ||
| GUM | 3.2 | 6.0 | ||
| ARPANSA | 5.2 | 8.2 | ||
| BFKH | -0.7 | 6.2 | ||
| CNEA | 1.1 | 14.3 | ||
| LMNRI/IRD | -9.4 | 12.1 | ||
| ININ | -12.1 | 16.1 | ||
| BARC | 10.0 | 15.7 | ||
| PTKMR-BATAN | 3.2 | 12.7 | ||
| INER | 4.0 | 10.0 | ||
| LNMRI/IRD | 1.0 | 9.4 | ||
| NMISA | 0.3 | 8.0 | ||
| NIS | 5.7 | 15.8 | ||
| Nuclear Malaysia | 2.2 | 10.2 |
Data older than 15 years are no longer included for degrees of equivalence
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 180 kV
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mGy/Gy |
mGy/Gy |
mGy/Gy |
||
| PTB | 4.9 | 5.2 | ||
| ENEA | 7.3 | 6.2 | ||
| BEV | 4.1 | 6.4 | ||
| NRC | 1.3 | 6.6 | ||
| NMIJ | -2.4 | 6.2 | ||
| VSL | 0.0 | 6.4 | ||
| NIST | -2.7 | 7.8 | ||
| NIM | 6.1 | 6.2 | ||
| NPL | -2.5 | 6.8 | ||
| KRISS | 4.3 | 4.4 | ||
| LNE-LNHB | -1.0 | 7.6 | ||
| VNIIM | 1.7 | 3.8 | ||
| GUM | 3.6 | 6.0 | ||
| ARPANSA | 5.4 | 8.2 | ||
| BFKH | -0.7 | 6.2 | ||
| CNEA | 2.1 | 14.3 | ||
| LMNRI/IRD | -8.0 | 12.1 | ||
| ININ | -11.1 | 16.1 | ||
| BARC | 7.9 | 14.5 | ||
| PTKMR-BATAN | -1.9 | 12.7 | ||
| INER | 2.6 | 9.7 | ||
| LNMRI/IRD | -0.1 | 9.3 | ||
| NMISA | -0.2 | 7.9 | ||
| NIS | 2.00 | 15.8 | ||
| Nuclear Malaysia | -0.9 | 9.2 |
Data older than 15 years are no longer included for degrees of equivalence
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 250 kV
Degrees of equivalence represented by Di = (xI - xR)/xR and its expanded uncertainty Ui at a 95 % level of confidence, both expressed in mGy/Gy.
| LABi | Di | Uneg,i | Upos,i | |
|---|---|---|---|---|
mGy/Gy |
mGy/Gy |
mGy/Gy |
||
| PTB | 5.5 | 5.2 | ||
| ENEA | 5.6 | 6.2 | ||
| BEV | 1.1 | 6.4 | ||
| NRC | 0.4 | 6.6 | ||
| NMIJ | -3.7 | 6.2 | ||
| VSL | -2.1 | 6.4 | ||
| NIST | -5.8 | 7.8 | ||
| NIM | 6.0 | 6.2 | ||
| NPL | -4.4 | 6.8 | ||
| KRISS | 2.8 | 4.4 | ||
| LNE-LNHB | -2.8 | 7.6 | ||
| VNIIM | 2.2 | 3.8 | ||
| GUM | 2.7 | 6.0 | ||
| ARPANSA | 4.5 | 8.2 | ||
| BFKH | -0.7 | 6.2 | ||
| CNEA | 1.4 | 14.3 | ||
| LMNRI/IRD | -8.5 | 12.1 | ||
| ININ | -12.0 | 16.1 | ||
| PTKMR-BATAN | 2.4 | 13.0 | ||
| INER | 2.2 | 9.9 | ||
| LNMRI/IRD | -0.2 | 9.3 | ||
| NMISA | -1.1 | 8.1 | ||
| Nuclear Malaysia | -6.8 | 9.1 |
Data older than 15 years are no longer included for degrees of equivalence
| Metrology area, Sub-field | Ionizing Radiation, Section I (x and gamma rays, electrons) |
| Description | Measurement of air kerma for medium energy X-rays |
| Time of measurements | 1975 - |
| Status | Continuous, approved for equivalence |
| References | |
| Measurand | Air-kerma rate relative to the BIPM evaluation |
| Parameters | Radiation type: X-rays Radiation quality: 100 kV to 250 kV |
| Transfer device | Ionization chambers |
| Comparison type | Key Comparison |
| Consultative Committee | CCRI (Consultative Committee for Ionizing Radiation) |
| Conducted by | BIPM (Bureau International des Poids et Mesures) |
| Comments | The Final Report for each bi-lateral comparsion is listed in the tab "Participants" First results published on 28 November 2003 Update on 18 September 2009 following a re-evaluation of the BIPM international standards for air kerma in x-rays Most recent update : 29 January 2024 |
| Pilot institute |
BIPM
Bureau International des Poids et Mesures BIPM - International Organization |
| Contact person | D. T. Burns +33 (0) 1 45 07 70 80 |
| Pilot laboratory | |
|---|---|
| BIPM |
Bureau International des Poids et Mesures, BIPM - International Organization, N/A |
| ARPANSA |
Australian Radiation Protection and Nuclear Safety Agency, Australia, APMP |
| 1988 |
|
| 2010 | |
| 2020 |
| BEV |
Bundesamt für Eich- und Vermessungswesen, Austria, EURAMET |
| 2002 | |
| 2014 |
| BFKH |
Government Office of the Capital City Budapest, Hungary, EURAMET |
| 1998 |
comparison carried out with OMH (Országos Mérésügyi Hivatal) |
| 2010 |
comparison carried out with OMH (Országos Mérésügyi Hivatal) |
| 2021 |
| ENEA-INMRI |
Istituto Nazionale di Metrologia delle Radiazioni Ionizzanti, Italy, EURAMET |
| 1998 | |
| 2014 |
| GUM |
Glowny Urzad Miar, Central Office of Measures, Poland, EURAMET |
| 1994 | |
| 2010 | |
| 2020 |
| KRISS |
Korea Research Institute of Standards and Science, Korea, Republic of, APMP |
| 2017 |
| LNE-LNHB |
Commissariat à l'énergie atomique / Laboratoire National Henri Becquerel, France, EURAMET |
| 2007 |
|
| 2018 |
| NIM |
National Institute of Metrology, China, APMP |
| 2001 | |
| 2017 |
| NIST |
National Institute of Standards and Technology, United States, SIM |
| 1991 | |
| 2003 | |
| 2016 |
| NMIJ AIST |
National Metrology Institute of Japan, Japan, APMP |
| 2006 | |
| 2015 |
| NPL |
National Physical Laboratory, United Kingdom, EURAMET |
| 1997 | |
| 2007 | |
| 2017 |
| NRC |
National Research Council, Canada, SIM |
| 1998 | |
| 2014 |
| PTB |
Physikalisch-Technische Bundesanstalt, Germany, EURAMET |
| 1999 | |
| 2014 |
| VNIIM |
D.I. Mendeleyev Institute for Metrology, Rosstandart, Russian Federation, COOMET |
| 1998 | |
| 2010 | |
| 2020 |
|
| VSL |
VSL, Netherlands, EURAMET |
| 1991 |
comparison carried out with NMi (Nederlands Meetinstituut - Van Swinden Laboratorium) |
| 2002 |
comparison carried out with NMi (Nederlands Meetinstituut - Van Swinden Laboratorium) |
| 2016 |
This page proposes print-out on A4 paper (portrait) of the comparison details (best printed out using a black and white printer).
Please, select items to be printed out, then click on "OK" :
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 100 kV
BIPM.RI(I)-K3
For a comparison with laboratory i , the key comparison reference value is the BIPM air kerma determination xR,i and its standard uncertainty uR,i .
The degree of equivalence of each laboratory i with respect to the key comparison reference value xR,i is given by a pair of terms:
Di and Ui = 2ui , its expanded uncertainty (k = 2), both expressed in mGy/Gy:
When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms:
Dij = Di - Dj and Uij = 2uij , its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij , account should be taken of correlation between uij and uj (see the BIPM.RI(I)-K3 Summary Report Metrologia 2003 40 06036). For regional comparisons involving secondary standards, this includes correlation related to traceability (see the and SIM.RI(I)-K3 Final Report and APMP.RI(I)-K3.2013 Final Report).
Linking SIM.RI(I)-K3 to BIPM.RI(I)-K3
The results of SIM.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via NIST (United States) who participated in both comparisons.
Linking APMP.RI(I)-K3.2013 to BIPM.RI(I)-K3
The results of APMP.RI(I)-K3.2013 were linked to those of BIPM.RI(I)-K3 via NMIJ (Japan) and ARPANSA (Australia) who participated in both comparisons.
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 135 kV
BIPM.RI(I)-K3
For a comparison with laboratory i , the key comparison reference value is the BIPM air kerma determination xR,i and its standard uncertainty uR,i .
The degree of equivalence of each laboratory i with respect to the key comparison reference value xR,i is given by a pair of terms:
Di and Ui = 2ui , its expanded uncertainty (k = 2), both expressed in mGy/Gy:
When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms:
Dij = Di - Dj and Uij = 2uij , its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij , account should be taken of correlation between uij and uj (see the BIPM.RI(I)-K3 Summary Report Metrologia 2003 40 06036). For regional comparisons involving secondary standards, this includes correlation related to traceability (see the and SIM.RI(I)-K3 Final Report and APMP.RI(I)-K3.2013 Final Report).
Linking SIM.RI(I)-K3 to BIPM.RI(I)-K3
The results of SIM.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via NIST (United States) who participated in both comparisons.
Linking APMP.RI(I)-K3.2013 to BIPM.RI(I)-K3
The results of APMP.RI(I)-K3.2013 were linked to those of BIPM.RI(I)-K3 via NMIJ (Japan) and ARPANSA (Australia) who participated in both comparisons.
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 180 kV
BIPM.RI(I)-K3
For a comparison with laboratory i , the key comparison reference value is the BIPM air kerma determination xR,i and its standard uncertainty uR,i .
The degree of equivalence of each laboratory i with respect to the key comparison reference value xR,i is given by a pair of terms:
Di and Ui = 2ui , its expanded uncertainty (k = 2), both expressed in mGy/Gy:
When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms:
Dij = Di - Dj and Uij = 2uij , its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij , account should be taken of correlation between uij and uj (see the BIPM.RI(I)-K3 Summary Report Metrologia 2003 40 06036). For regional comparisons involving secondary standards, this includes correlation related to traceability (see the and SIM.RI(I)-K3 Final Report and APMP.RI(I)-K3.2013 Final Report).
Linking SIM.RI(I)-K3 to BIPM.RI(I)-K3
The results of SIM.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via NIST (United States) who participated in both comparisons.
Linking APMP.RI(I)-K3.2013 to BIPM.RI(I)-K3
The results of APMP.RI(I)-K3.2013 were linked to those of BIPM.RI(I)-K3 via NMIJ (Japan) and ARPANSA (Australia) who participated in both comparisons.
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 250 kV
BIPM.RI(I)-K3
For a comparison with laboratory i , the key comparison reference value is the BIPM air kerma determination xR,i and its standard uncertainty uR,i .
The degree of equivalence of each laboratory i with respect to the key comparison reference value xR,i is given by a pair of terms:
Di and Ui = 2ui , its expanded uncertainty (k = 2), both expressed in mGy/Gy:
When required, the degree of equivalence between two laboratories i and j can be evaluated by a pair of terms:
Dij = Di - Dj and Uij = 2uij , its expanded uncertainty (k = 2), both expressed in mGy/Gy. In evaluating uij , account should be taken of correlation between uij and uj (see the BIPM.RI(I)-K3 Summary Report Metrologia 2003 40 06036). For regional comparisons involving secondary standards, this includes correlation related to traceability (see the and SIM.RI(I)-K3 Final Report and APMP.RI(I)-K3.2013 Final Report).
Linking SIM.RI(I)-K3 to BIPM.RI(I)-K3
The results of SIM.RI(I)-K3 were linked to those of BIPM.RI(I)-K3 via NIST (United States) who participated in both comparisons.
Linking APMP.RI(I)-K3.2013 to BIPM.RI(I)-K3
The results of APMP.RI(I)-K3.2013 were linked to those of BIPM.RI(I)-K3 via NMIJ (Japan) and ARPANSA (Australia) who participated in both comparisons.
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 100 kV
xi air kerma determined by Labi at the BIPM, relative to the reference value determined by the BIPM standard
ui combined standard uncertainty of xi taking correlation into account
BIPM.RI(I)-K3
| Labi | xi | ui | year of measurement | |
| PTB | 1.0027 | 0.0026 | 2014 | |
| ENEA | 1.0039 | 0.0031 | 2014 | |
| BEV | 1.0032 | 0.0032 | 2014 | |
| NRC | 1.0031 | 0.0033 | 2014 | |
| NMIJ | 0.9992 | 0.0031 | 2015 | |
| VSL | 0.9990 | 0.0032 | 2016 | |
| NIST | 0.9978 | 0.0039 | 2016 | |
| NIM | 1.0072 | 0.0031 | 2017 | |
| NPL | 1.0004 | 0.0034 | 2017 | |
| KRISS | 1.0041 | 0.0022 | 2017 | |
| LNE-LNHB | 1.0005 | 0.0038 | 2018 | |
| VNIIM | 1.0005 | 0.0019 | 2020 | |
| GUM | 1.0069 | 0.0030 | 2020 | |
| ARPANSA | 1.0038 | 0.0041 | 2020 | |
| BFKH | 0.9946 | 0.0031 | 2021 |
SIM.RI(I)-K3
| Labi | xi | ui | year of measurement | |
| CNEA | 0.9940 | 0.0072 | 2008 | |
| LMNRI/IRD | 0.9905 | 0.0061 | 2008 | |
| ININ | 0.9907 | 0.0081 | 2008 |
APMP.RI(I)-K3.2013
APMP.RI(I)-K3.2013 comparison results for each laboratory are listed in Section 4 and appendices of the APMP.RI(I)-K3.2013 Final Report.
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 135 kV
xi air kerma determined by Labi at the BIPM, relative to the reference value determined by the BIPM standard
ui combined standard uncertainty of xi taking correlation into account
BIPM.RI(I)-K3
| Labi | xi | ui | year of measurement | |
| PTB | 1.0045 | 0.0026 | 2014 | |
| ENEA | 1.0042 | 0.0031 | 2014 | |
| BEV | 1.0047 | 0.0032 | 2014 | |
| NRC | 1.0023 | 0.0033 | 2014 | |
| NMIJ | 0.9986 | 0.0031 | 2015 | |
| VSL | 0.9996 | 0.0032 | 2016 | |
| NIST | 0.9967 | 0.0039 | 2016 | |
| NIM | 1.0054 | 0.0031 | 2017 | |
| NPL | 1.0000 | 0.0034 | 2017 | |
| KRISS | 1.0051 | 0.0022 | 2017 | |
| LNE-LNHB | 0.9995 | 0.0038 | 2018 | |
| VNIIM | 1.0010 | 0.0019 | 2020 | |
| GUM | 1.0032 | 0.0030 | 2020 | |
| ARPANSA | 1.0052 | 0.0041 | 2020 | |
| BFKH | 0.9993 | 0.0031 | 2021 |
SIM.RI(I)-K3
| Labi | xi | ui | year of measurement | |
| CNEA | 1.0011 | 0.0072 | 2008 | |
| LMNRI/IRD | 0.9906 | 0.0061 | 2008 | |
| ININ | 0.9879 | 0.0081 | 2008 |
APMP.RI(I)-K3.2013
APMP.RI(I)-K3.2013 comparison results for each laboratory are listed in Section 4 and appendices of the APMP.RI(I)-K3.2013 Final Report.
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 180 kV
xi air kerma determined by Labi at the BIPM, relative to the reference value determined by the BIPM standard
ui combined standard uncertainty of xi taking correlation into account
BIPM.RI(I)-K3
| Labi | xi | ui | year of measurement | |
| PTB | 1.0049 | 0.0026 | 2014 | |
| ENEA | 1.0073 | 0.0031 | 2014 | |
| BEV | 1.0041 | 0.0032 | 2014 | |
| NRC | 1.0013 | 0.0033 | 2014 | |
| NMIJ | 0.9976 | 0.0031 | 2015 | |
| VSL | 1.0000 | 0.0032 | 2016 | |
| NIST | 0.9973 | 0.0039 | 2016 | |
| NIM | 1.0061 | 0.0031 | 2017 | |
| NPL | 0.9975 | 0.0034 | 2017 | |
| KRISS | 1.0043 | 0.0022 | 2017 | |
| LNE-LNHB | 0.9990 | 0.0038 | 2018 | |
| VNIIM | 1.0017 | 0.0019 | 2020 | |
| GUM | 1.0036 | 0.0030 | 2020 | |
| ARPANSA | 1.0054 | 0.0041 | 2020 | |
| BFKH | 0.9993 | 0.0031 | 2021 |
SIM.RI(I)-K3
| Labi | xi | ui | year of measurement | |
| CNEA | 1.0021 | 0.0072 | 2008 | |
| LMNRI/IRD | 0.9920 | 0.0061 | 2008 | |
| ININ | 0.9889 | 0.0081 | 2008 |
APMP.RI(I)-K3.2013
APMP.RI(I)-K3.2013 comparison results for each laboratory are listed in Section 4 and appendices of the APMP.RI(I)-K3.2013 Final Report.
BIPM.RI(I)-K3, SIM.RI(I)-K3 and APMP.RI(I)-K3.2013
MEASURAND Air kerma
Radiation quality 250 kV
xi air kerma determined by Labi at the BIPM, relative to the reference value determined by the BIPM standard
ui combined standard uncertainty of xi taking correlation into account
BIPM.RI(I)-K3
| Labi | xi | ui | year of measurement | |
| PTB | 1.0055 | 0.0026 | 2014 | |
| ENEA | 1.0056 | 0.0031 | 2014 | |
| BEV | 1.0011 | 0.0032 | 2014 | |
| NRC | 1.0004 | 0.0033 | 2014 | |
| NMIJ | 0.9963 | 0.0031 | 2015 | |
| VSL | 0.9979 | 0.0032 | 2016 | |
| NIST | 0.9942 | 0.0039 | 2016 | |
| NIM | 1.0060 | 0.0031 | 2017 | |
| NPL | 0.9956 | 0.0034 | 2017 | |
| KRISS | 1.0028 | 0.0022 | 2017 | |
| LNE-LNHB | 0.9972 | 0.0038 | 2018 | |
| VNIIM | 1.0022 | 0.0019 | 2020 | |
| GUM | 1.0027 | 0.0030 | 2020 | |
| ARPANSA | 1.0045 | 0.0041 | 2020 | |
| BFKH | 0.9993 | 0.0031 | 2021 |
SIM.RI(I)-K3
| Labi | xi | ui | year of measurement | |
| CNEA | 1.0014 | 0.0072 | 2008 | |
| LMNRI/IRD | 0.9915 | 0.0061 | 2008 | |
| ININ | 0.9880 | 0.0081 | 2008 |
APMP.RI(I)-K3.2013
APMP.RI(I)-K3.2013 comparison results for each laboratory are listed in Section 4 and appendices of the APMP.RI(I)-K3.2013 Final Report.
