mass metrology

BIPM technical services: Mass Metrology

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mass - INTRO

The principal role of the Physical Metrology Department is to promote world-wide compatibility in mass measurements by providing calibrations traceable to the kilogram. The Department also organizes key comparisons to determine the level of agreement between kilogram realizations from different NMIs and to provide information for the calculation of the CCM ‘consensus value’. The latter will be the basis for the internationally coordinated dissemination of the kilogram until the dispersion in values becomes compatible with the individual realization uncertainties. Research and development are carried out in several areas in order to improve our services and understanding of the fundamental problems of mass determinations at the kilogram level.

mass-comparator.jpg

The BIPM mass comparator with prototype kilograms in place

Contact

Contact

Dr Michael Stock

Physical Metrology Department

Asset Publisher

Calibrations

Technical service - Calibration

Prototype kilogram, 1 kg
Calibration in air
Combined expanded uncertainty 42 µg
(k = 2, level of confidence 95%)

Technical service - Calibration

Stainless steel mass standard, 1 kg
Calibration in air
Combined expanded uncertainty 42 µg
(k = 2, level of confidence 95%)

Completed comparisons

Technical service - Comparison

Realization of the kilogram
CCM.M-K8.2021

Technical service - Comparison

Realization of the kilogram
CCM.M-K8.2019

Technical service - Comparison

Future realizations of the kilogram
CCM Pilot Study

selected publications - TITLE

Selected publications

Asset Publisher

Final report on the CCM key comparison of kilogram realizations CCM.M-K8.2021

2023

Beginning of a new phase of the dissemination of the kilogram

2021

Report on the CCM key comparison of kilogram realizations, CCM.M-K8.2019

2020

A comparison of future realizations of the kilogram

2018

Maintaining and disseminating the kilogram following its redefinition

2017

certificates issued - TITLE h2

 

Certificates issued

Asset Publisher

Search filter :

Calibration certificate No.127 (2025)

1 kg Pt Iridium mass standard, 56
  • ZA
  • NMISA

Calibration certificate No.126 (2025)

1 kg Pt Iridium mass standard, 35
  • FR
  • LNE

Calibration certificate No.125 (2025)

1 kg stainless steel mass standard, KZ3
  • KZ
  • KazInMetr

Calibration certificate No.53 (2025)

1 kg Pt Iridium mass standard, 76
  • IT
  • INRIM

Calibration certificate No.114 (2024)

1 kg stainless steel mass standard, NSCCL
  • CL
  • CESMEC

Calibration certificate No.113 (2024)

1 kg stainless steel mass standard, 13504
  • GR
  • EIM

Calibration certificate No.112 (2024)

1 kg stainless steel mass standard, 13501
  • GR
  • EIM

Calibration certificate No.111 (2024)

1 kg stainless steel mass standard, 706641
  • CR
  • LACOMET

Calibration certificate No.110 (2024)

1 kg stainless steel mass standard, 116478
  • PT
  • IPQ

Calibration certificate No.109 (2024)

1 kg stainless steel mass standard, 116477
  • PT
  • IPQ

Calibration certificate No.108 (2024)

1 kg stainless steel mass standard, 116476
  • PT
  • IPQ

Calibration certificate No.107 (2024)

1 kg stainless steel mass standard, 116475
  • PT
  • IPQ

Calibration certificate No.106 (2024)

1 kg stainless steel mass standard, MS-S-14
  • NO
  • JV

Calibration certificate No.105 (2024)

1 kg stainless steel mass standard, LMN-5
  • NO
  • JV

Calibration certificate No.104 (2024)

1 kg Pt Iridium mass standard, 36
  • NO
  • JV

Calibration certificate No.103 (2024)

1 kg Pt Iridium mass standard, 64
  • CN
  • NIM

Calibration certificate No.90 (2024)

Barometer, ROTRONIC-ELEC-04
  • BIPM

Calibration certificate No.89 (2024)

Barometer, BAR-ELEC-08
  • BIPM

Calibration certificate No.88 (2024)

Barometer, BAR-ELEC-07
  • BIPM

Calibration certificate No.87 (2024)

Barometer, BAR-ELEC-06
  • BIPM

Calibration certificate No.86 (2024)

Barometer, BAR-ELEC-05
  • BIPM

Calibration certificate No.85 (2024)

Barometer, BAR-ELEC-04
  • BIPM

Calibration certificate No.84 (2024)

Barometer, BAR-ELEC-03
  • BIPM

Calibration certificate No.83 (2024)

Barometer, BAR-ELEC-02
  • BIPM

Calibration certificate No.62 (2024)

Barometer, PS10
  • BIPM

Calibration certificate No.61 (2024)

Barometer, PS9
  • BIPM

Calibration certificate No.60 (2024)

Barometer, PS7
  • BIPM

Calibration certificate No.59 (2024)

Barometer, PS3
  • BIPM

Calibration certificate No.58 (2024)

Barometer, PS2
  • BIPM

Calibration certificate No.42 (2024)

1 kg stainless steel mass standard, S
  • NZ
  • MSL

Calibration certificate No.21 (2024)

1 kg stainless steel mass standard, 11116701
  • BG
  • BIM

Calibration certificate No.13 (2024)

1 kg Pt Iridium mass standard, 93
  • SA
  • SASO

Calibration certificate No.12 (2024)

1 kg Pt Iridium mass standard, 53
  • NL
  • VSL

Calibration certificate No.11 (2024)

1 kg Pt Iridium mass standard, 18
  • GB
  • NPL

Study note No.1 (2024)

Barometre, CHEM-099
  • BIPM

Calibration certificate No.167 (2023)

1 kg stainless steel mass standard, 81
  • RO
  • INM

Calibration certificate No.166 (2023)

1 kg stainless steel mass standard, 6
  • RO
  • INM

Calibration certificate No.165 (2023)

1 kg Pt Iridium mass standard, 2
  • RO
  • INM

Calibration certificate No.164 (2023)

1 kg Pt Iridium mass standard, 60
  • CN
  • NIM

Calibration certificate No.87 (2023)

1 kg stainless steel mass standard, R0
  • TH
  • NIMT

Calibration certificate No.86 (2023)

1 kg stainless steel mass standard, E0
  • TH
  • NIMT

Calibration certificate No.85 (2023)

1 kg stainless steel mass standard, C1
  • TH
  • NIMT

Calibration certificate No.84 (2023)

1 kg Pt Iridium mass standard, 80
  • TH
  • NIMT

Calibration certificate No.80 (2023)

1 kg Pt Iridium mass standard, 55
  • DE
  • PTB

Calibration certificate No.79 (2023)

1 kg stainless steel mass standard, 83700
  • SG
  • NMC, A*STAR

Calibration certificate No.78 (2023)

1 kg stainless steel mass standard, LM-043
  • SI
  • MIRS

Calibration certificate No.77 (2023)

1 kg stainless steel mass standard, LM-091
  • SI
  • MIRS

Calibration certificate No.76 (2023)

1 kg stainless steel mass standard, LM-090
  • SI
  • MIRS

Calibration certificate No.75 (2023)

1 kg Pt Iridium mass standard, 83
  • SG
  • NMC, A*STAR

Calibration certificate No.74 (2023)

1 kg stainless steel mass standard, 22597
  • UY
  • LATU

Calibration certificate No.73 (2023)

1 kg stainless steel mass standard, 112493
  • ID
  • SNSU-BSN

Calibration certificate No.72 (2023)

1 kg stainless steel mass standard, 112491
  • ID
  • SNSU-BSN

Calibration certificate No.71 (2023)

1 kg stainless steel mass standard, 74
  • ID
  • SNSU-BSN

Calibration certificate No.70 (2023)

1 kg stainless steel mass standard, M003
  • EE
  • Metrosert

Calibration certificate No.56 (2023)

1 kg stainless steel mass standard, P120684
  • HR
  • DZM

Calibration certificate No.55 (2023)

1 kg stainless steel mass standard, P0296
  • HR
  • DZM

Calibration certificate No.54 (2023)

1 kg stainless steel mass standard, B6
  • AT
  • BEV

Calibration certificate No.53 (2023)

1 kg stainless steel mass standard, B3
  • AT
  • BEV

Calibration certificate No.9 (2023)

1 kg stainless steel mass standard, MTE1
  • EC
  • INEN

Calibration certificate No.8 (2023)

1 kg stainless steel mass standard, T**
  • EC
  • INEN

Calibration certificate No.7 (2023)

1 kg stainless steel mass standard, T*
  • EC
  • INEN

Calibration certificate No.138 (2022)

1 kg stainless steel mass standard, KS5
  • KE
  • KBS

Calibration certificate No.137 (2022)

1 kg stainless steel mass standard, KS4
  • KE
  • KBS

Calibration certificate No.136 (2022)

1 kg stainless steel mass standard, KS3
  • KE
  • KBS

Calibration certificate No.135 (2022)

1 kg stainless steel mass standard, KS2
  • KE
  • KBS

Calibration certificate No.134 (2022)

1 kg stainless steel mass standard, KS1
  • KE
  • KBS

Calibration certificate No.133 (2022)

1 kg Pt-Ir mass prototype, 95
  • KE
  • KBS

Calibration certificate No.121 (2022)

1 kg stainless steel mass standard, 143131
  • AE
  • EMI

Calibration certificate No.120 (2022)

1 kg stainless steel mass standard, 143130
  • AE
  • EMI

Calibration certificate No.119 (2022)

1 kg stainless steel mass standard, 4S2
  • NL
  • VSL

Calibration certificate No.118 (2022)

1 kg stainless steel mass standard, 3S2
  • NL
  • VSL

Calibration certificate No.117 (2022)

1 kg stainless steel mass standard, EGE1
  • EG
  • NIS

Calibration certificate No.116 (2022)

1 kg stainless steel mass standard, EGA
  • EG
  • NIS

Calibration certificate No.115 (2022)

1 kg Pt-Ir mass prototype, 58
  • EG
  • NIS

Calibration certificate No.114 (2022)

1 kg stainless steel mass standard, SMD1+
  • BE
  • SMD

Calibration certificate No.113 (2022)

1 kg stainless steel mass standard, SMD1
  • BE
  • SMD

Calibration certificate No.112 (2022)

1 kg Pt-Ir mass prototype, 37
  • BE
  • SMD

Calibration certificate No.111 (2022)

1 kg Pt-Ir mass prototype, 69
  • PT
  • IPQ

Calibration certificate No.110 (2022)

1 kg Pt-Ir mass prototype, 10
  • PT
  • IPQ

Calibration certificate No.109 (2022)

1 kg Pt-Ir mass prototype, 57
  • IN
  • NPLI

Calibration certificate No.108 (2022)

1 kg Pt-Ir mass prototype, 23
  • FI
  • MIKES

Calibration certificate No.66 (2022)

Baromètre, BAR-ELEC-08, sn° Z2830001
  • BIPM (PMD)

Calibration certificate No.65 (2022)

Baromètre, PS9, sn° 93212
  • BIPM (PMD)

Calibration certificate No.64 (2022)

Baromètre, BAR-ELEC-07, sn° Z3310006
  • BIPM (PMD)

Calibration certificate No.63 (2022)

Baromètre, BAR-ELEC-02, sn° 64314
  • BIPM (PMD)

Calibration certificate No.62 (2022)

Baromètre, BAR-ELEC-03, sn°4
  • BIPM (PMD)

Calibration certificate No.61 (2022)

Baromètre, BAR-ELEC-04, sn°64312
  • BIPM (PMD)

Calibration certificate No.60 (2022)

Baromètre, Rotronic_ELEC-04, sn° 61444896
  • BIPM (PMD)

Calibration certificate No.59 (2022)

Baromètre, BAR-ELEC-05, sn° 79557
  • BIPM (PMD)

Calibration certificate No.58 (2022)

Baromètre, BAR-ELEC-06, sn° 65492
  • BIPM (PMD)

Calibration certificate No.57 (2022)

Baromètre, PS8, sn° 97549
  • BIPM (PMD)

Calibration certificate No.36 (2022)

New 1 kg Pt-Ir mass prototype, 115
  • CN
  • NIM

Calibration certificate No.23 (2022)

New 1 kg Pt-Ir mass prototype, 114
  • CN
  • NIM

Study note No.8 (2022)

Baromètre, RPM4 A100ks, sn° 4021
  • BIPM (CHEM)

Study note No.7 (2022)

Baromètre, RPM4 A100ks, sn° 2132
  • BIPM (CHEM)

Study note No.5 (2022)

Baromètre, RPM4 A100ks, sn° 2132
  • BIPM (CHEM)

Study note No.4 (2022)

Hygromètre, HMT334, sn° C4840009
  • BIPM (PMD)

Study note No.3 (2022)

Hygromètre, BT-RS1, sn° 11714015
  • BIPM (PMD)

Study note No.2 (2022)

Hygromètre, M4-DP sn° 1971198
  • BIPM (PMD)

Study note No.1 (2022)

Baromètre, RPM4 A100ks, sn° 2132
  • BIPM (CHEM)

Calibration certificate No.108 (2021)

1 kg Pt-Ir mass prototype, No. 96
  • MX
  • CENAM

Calibration certificate No.107 (2021)

1 kg Pt-Ir mass prototype, No. 21
  • MX
  • CENAM

Calibration certificate No.106 (2021)

1 kg Pt-Ir mass prototype, No. 48
  • DK
  • DFM

Calibration certificate No.43 (2021)

1 kg stainless steel mass standard, 1950507
  • UY
  • LATU

Calibration certificate No.42 (2021)

1 kg stainless steel mass standard, LM-043
  • SI
  • MIRS

Calibration certificate No.41 (2021)

1 kg stainless steel mass standard, LM-091
  • SI
  • MIRS

Calibration certificate No.40 (2021)

1 kg stainless steel mass standard, LM-090
  • SI
  • MIRS

Calibration certificate No.39 (2021)

1 kg stainless steel mass standard, MP3
  • ES
  • CEM

Calibration certificate No.20 (2021)

1 kg stainless steel mass standard, 4S2
  • NL
  • VSL

Calibration certificate No.19 (2021)

1 kg stainless steel mass standard, 3S2
  • NL
  • VSL

Calibration certificate No.18 (2021)

1 kg stainless steel mass standard, SMD1+
  • BE
  • SMD

Calibration certificate No.17 (2021)

1 kg stainless steel mass standard, SMD1
  • BE
  • SMD

Calibration certificate No.16 (2021)

1 kg Pt-Ir mass prototype, 28
  • BE
  • SMD

Calibration certificate No.15 (2021)

1 kg stainless steel mass standard, S
  • NZ
  • MSL

Calibration certificate No.14 (2021)

1 kg stainless steel mass standard, KZ3
  • KZ
  • KazStandard

Calibration certificate No.13 (2021)

1 kg stainless steel mass standard, KZ2
  • KZ
  • KazStandard

Calibration certificate No.12 (2021)

1 kg stainless steel mass standard, KZ1
  • KZ
  • KazStandard

Calibration certificate No.11 (2021)

1 kg stainless steel mass standard, NIM 010108
  • CO
  • INM

Calibration certificate No.10 (2021)

1 kg stainless steel mass standard, NIM 010107
  • CO
  • INM

Calibration certificate No.9 (2021)

1 kg stainless steel mass standard, NIM 010103
  • CO
  • INM

Calibration certificate No.8 (2021)

1 kg stainless steel mass standard, NIM 010102
  • CO
  • INM

Calibration certificate No.7 (2021)

1 kg stainless steel mass standard, NIM 010101
  • CO
  • INM

Calibration certificate No.6 (2021)

1 kg stainless steel mass standard, NIM 010100
  • CO
  • INM

Calibration certificate No.5 (2021)

1 kg stainless steel mass standard, 57635
  • PL
  • GUM

Calibration certificate No.4 (2021)

1 kg Pt-Ir mass prototype, 51
  • PL
  • GUM

Calibration certificate No.3 (2021)

1 kg stainless steel mass standard, 51701
  • CZ
  • CMI

Calibration certificate No.2 (2021)

1 kg Pt-Ir mass prototype, 67
  • CZ
  • CMI

Calibration certificate No.1 (2021)

1 kg stainless steel mass standard, 11116701
  • BG
  • BIM

Calibration certificate No.98 (2019)

1 kg Pt-Ir mass prototype, No. 112
  • ID
  • SNSU-BSN

Calibration certificate No.56 (2019)

1 kg stainless steel mass standard, No. B3
  • AT
  • BEV

Calibration certificate No.55 (2019)

1 kg stainless steel mass standard, No. E7
  • SK
  • SMU

Calibration certificate No.54 (2019)

1 kg stainless steel mass standard, No. E6
  • SK
  • SMU

Calibration certificate No.53 (2019)

1 kg stainless steel mass standard, No. E5
  • SK
  • SMU

Calibration certificate No.52 (2019)

1 kg stainless steel mass standard, No. E4
  • SK
  • SMU

Calibration certificate No.51 (2019)

1 kg stainless steel mass standard, No. SMD1+
  • BE
  • SMD

Calibration certificate No.50 (2019)

1 kg stainless steel mass standard, No. SMD1
  • BE
  • SMD

Calibration certificate No.49 (2019)

1 kg stainless steel mass standard, No. LATU 22597
  • UY
  • LATU

Calibration certificate No.48 (2019)

1 kg stainless steel mass standard, No. DSTU 02-01-09/1kg
  • UA
  • NSC

Calibration certificate No.47 (2019)

1 kg Pt-Ir mass prototype, No. 65
  • SK
  • SMU

Calibration certificate No.46 (2019)

1 kg Pt-Ir mass prototype, No. 49
  • AT
  • BEV

Calibration certificate No.45 (2019)

1 kg Pt-Ir mass prototype, No. 37
  • BE
  • SMD

Calibration certificate No.44 (2019)

1 kg Pt-Ir mass prototype, No. 20
  • US
  • NIST

Calibration certificate No.12 (2019)

1 kg stainless steel mass standard, No. 1kr2
  • MY
  • NMIM

Calibration certificate No.11 (2019)

1 kg stainless steel mass standard, No. M1
  • MY
  • NMIM

Calibration certificate No.10 (2019)

1 kg stainless steel mass standard, No. LM-043
  • SI
  • MIRS

Calibration certificate No.9 (2019)

1 kg stainless steel mass standard, No. LM-042
  • SI
  • MIRS

Calibration certificate No.8 (2019)

1 kg stainless steel mass standard, No. LM-040
  • SI
  • MIRS

Calibration certificate No.7 (2019)

1 kg stainless steel mass standard, No. PTB48
  • AR
  • INTI

Calibration certificate No.6 (2019)

1 kg stainless steel mass standard, No. K30
  • AR
  • INTI

Calibration certificate No.5 (2019)

1 kg stainless steel mass standard, No. MP070
  • BR
  • INMETRO

Calibration certificate No.4 (2019)

1 kg stainless steel mass standard, Np. MP060
  • BR
  • INMETRO

Calibration certificate No.3 (2019)

1 kg mass prototype, No. 66
  • BR

Calibration certificate No.2 (2019)

1 kg mass prototype, No. 18
  • GB

Calibration certificate No.1 (2019)

1 kg mass prototype, No. 55
  • DE

Calibration certificate No.41 (2018)

1 kg mass standard, 4S2
  • NL
  • VSL

Calibration certificate No.40 (2018)

1 kg mass standard, 3S2
  • NL
  • VSL

Calibration certificate No.39 (2018)

1 kg mass prototype, No. 16
  • HU

Calibration certificate No.11 (2018)

1 kg mass standard, No. 33
  • RS
  • DMDM

Calibration certificate No.10 (2018)

1 kg mass standard, No. P120684
  • HR
  • HMI

Calibration certificate No.9 (2018)

1 kg mass standard, No. P0296
  • HR
  • HMI

Calibration certificate No.8 (2018)

1 kg mass standard, No. 013504/00
  • GR
  • EIM

Calibration certificate No.7 (2018)

1 kg mass standard, No. 013501/00
  • GR
  • EIM

Calibration certificate No.6 (2018)

1 kg mass standard, No. 112492
  • ID
  • RCM-LIPI

Calibration certificate No.5 (2018)

1 kg mass standard, No. 75
  • ID
  • RCM-LIPI

Calibration certificate No.4 (2018)

1 kg mass standard, No. 74
  • ID
  • RCM-LIPI

Calibration certificate No.3 (2018)

1 kg mass standard, No. 1950507
  • UY
  • LATU

Calibration certificate No.2 (2018)

1 kg mass standard, No. ID142131
  • AE
  • EMI

Calibration certificate No.1 (2018)

1 kg mass standard, No. ID142130
  • AE
  • EMI