– the intergovernmental organization through which Member States act together
     on matters related to measurement science and measurement standards.
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Calibration and characterization certificates: Length and frequency
The BIPM's Length Section closed its doors at the end of 2006, after many decades of activity at the BIPM. The members of the group were transferred to the Time, Frequency and Gravimetry Section, which in 2010 became the Time Department.

For other services offered by the BIPM, please refer to the summary charts for chemistry, electricity, ionizing radiation, mass and time.
2001
No. 89 Helium-neon laser at 633 nm, No. 132 NPL, United Kingdom
No. 88 Helium-neon laser at 633 nm, No. 107 CEM, Spain
No. 87 Helium-neon laser at 633 nm, No. 116 CEM, Spain
No. 78 Helium-neon laser at 633 nm, No. 180 NMIJ AIST, Japan
No. 75 Helium-neon laser at 633 nm, No. 137 IMGC, Italy
No. 74 Helium-neon laser at 633 nm, No. 129 BKG, Germany
No. 73 Helium-neon laser at 633 nm, No. 113 BKG, Germany
No. 53 Helium-neon laser at 633 nm, No. 158 IAG, Germany
No. 52 Helium-neon laser at 633 nm, No. 164 IAG, Germany
No. 51 Helium-neon laser at 633 nm, No. 159 METAS, Switzerland
No. 50 Helium-neon laser at 633 nm, No. 136 ORB, Belgium
No. 49 Helium-neon laser at 633 nm, No. 176 IGN, Spain
No. 48 Helium-neon laser at 633 nm, No. 160 GSD, Canada
No. 47 Helium-neon laser at 633 nm, No. 130 GSD, Canada
No. 46 Helium-neon laser at 633 nm, No. 102 NIST, United States of America
No. 45 Helium-neon laser at 633 nm, No. 148 BEV, Austria
No. 44 Helium-neon laser at 633 nm, No. 146 EOST, France
No. 7 Laser à hélium-néon de longueur d'onde 633 nm, NCM2 NCM, Bulgaria
No. 6 Laser à hélium-néon de longueur d'onde 633 nm, NCM1 NCM, Bulgaria
No. 5 Laser à hélium-néon de longueur d'onde 633 nm, no 68902 OMH, Hungary
No. 4 Laser à hélium-néon de longueur d'onde 633 nm, no 116 CEM, Spain

Study Notes
2001
No. 8 Laser à hélium-néon de longueur d'onde 633 nm, no 19 FGI, Finland
No. 7 Laser à hélium-néon de longueur d'onde 633 nm, no 18 FGI, Finland
No. 6 Laser à hélium-néon de longueur d'onde 633 nm, A10 BKG, Germany
No. 5 Laser à hélium-néon de longueur d'onde 633 nm, no 118 EOST, France
Traceability to the SI through the BIPM
Subject area:
What is traceability?
BIPM policy on stating uncertainties
Provision of BIPM technical services per Member State
Chemistry
Electricity
Ionizing Radiation
Mass
Time
Related articles
BIPM calibration and measurement services
Comparisons piloted by the BIPM