Abstract
The International System of Units (SI) of physical quantities is very important and necessary toolkit for any scientific development. The existing system adopted in 1960 by CGPM, France, is the globally well accepted, up-to-date, modern, coherent, having official status and even contemporary arrangement or form of the metric system starting with seven base units. It is almost dominant and globally accepted modern metric system of measurements used in science, engineering, technology, international trade and commerce. The system also embodied and agrees with limitless additional units, called derived units and special units, identified by special names and symbols which are always epitomized through seven base units. The SI is always envisioned to be an evolving system, wherein units, prefixes and definitions are created, modified and adapted as a result of international agreement arrived on the basis of advancement of measurement technologies and improvement in precision in measurements. As science evolves, advance technologies are developed which demand even more precise and accurate measurements. Due to advent of new technologies, the improvement in the accuracy of the products is carried out through development of new and improved measurement techniques, measurement standards and their definitions. Daily a number of precision measurements are performed which make our lives easier, comfortable, healthy and safer. In this chapter, authors have attempted to explain the historical aspects of metrology; international system of measurements, various international metrological organizations, for example, BIPM, NMIs, Metre Convention, MRA, etc. A brief overview of the importance and significance of the SI units; fundamental constants of nature (FCN) and their relevance in SI, historical aspects and evolution of SI units; redefinition of SI units in terms of FCN and current status and implication of redefined SI units, derived and other non-metric units, has also been presented. The whole contents are presented in a unique way to include scientific and analyzed data in tables, graphs, diagrams and flow charts to make the reading interesting for the readers.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
JCGM 200:2012, International vocabulary of metrology—basic and general concepts and associated terms (VIM), 2012
D.K. Aswal, Quality infrastructure of India and its importance for inclusive national growth. Mapan J. Metrol. Soc. India 35(2), 139–150 (2020). https://doi.org/10.1007/s12647-020-00376-3
P. Tavella, M.J.T. Milton, M. Inguscio, N. De Leo, Metrology: From Physics Fundamentals to Quality of Life. IOS Press, Proceedings of the International School of Physics “Enrico Fermi,” 2017
J. Fanton, A brief history of metrology: past, present, and future. Int. J. Metrol. Qual. Eng. 10(5), 1–8 (2019)
BIPM Meter Convention Webpage. https://www.bipm.org/en/worldwide-metrology/metre-convention/. Accessed 6 Jul 2020
World Metrology Day webpage. http://www.worldmetrologyday.org/. Accessed 6 Jul 2020
The role and objectives of the BIPM webpage. https://www.bipm.org/en/about-us/role.html. Accessed 6 Jul 2020
Consultative Committees of the CIPM. https://www.bipm.org/en/committees/cc/. Accessed 6 Jul 2020
BIPM SI-Brochure webpage. https://www.bipm.org/utils/common/pdf/si-brochure/SI-Brochure-9.pdf. Accessed 6 Jul 2020
International equivalence of measurements: the CIPM MRA webpage. https://www.bipm.org/en/cipm-mra/. Accessed 06 Jul 2020
BIPM KCDB webpage. https://www.bipm.org/kcdb/. Accessed 6 Jul 2020
Regional Metrology Organizations (RMOs) recognized within the framework of the CIPM MRA webpage. https://www.bipm.org/en/worldwide-metrology/regional/. Accessed 6 Jul 2020
Joint Committees of the BIPM and other international organizations, BIPM Webpage. https://www.bipm.org/en/committees/jc/. Accessed 7 Jul 2020
The International System of Units (SI) BIPM Webpage. https://www.bipm.org/en/measurement-units/. Accessed 7 Jul 2020
The Measure of All Things: A Brief History of Metrology Webpage. https://www.azom.com/article.aspx?ArticleID=12035. Accessed 6 Jul 2020
History of Measurement Webpage. http://www.historyworld.net/wrldhis/plaintexthistories.asp?historyid=ac07. Accessed 7 Jul 2020
History of the SI BIPM Webpage. https://www.bipm.org/en/measurement-units/history-si/. Accessed 6 Jul 2020
Physical Constant Wikipedia, webpage. https://en.wikipedia.org/wiki/Physical_constant. Accessed 18 Jul 2020
Resolution 1 of the 26th CGPM (2018), BIPM Webpage. https://www.bipm.org/en/CGPM/db/26/1/. Accessed 2 Jul 2020
Official Website of BIPM. https://www.bipm.org/en/measurement-units/. Accessed 9 May 2019
M. de Podesta, The impact of the kelvin redefinition and recent primary thermometry on temperature measurements for meteorology and climatology. https://www.wmo.int/pages/prog/www/IMOP/publications/IOM-125_TECO_2016/Session_1/O1(1)_dePodesta.pdf. Accessed 18 Jul 2020
R.M. Godun et al., Frequency ratio of two optical clock transitions in 171 Yb + and constraints on the time variation of fundamental constants. Phys. Rev. Lett. 210801(November), 1–5 (2014). https://doi.org/10.1103/PhysRevLett.113.210801
N. Huntemann, B. Lipphardt, C. Tamm, V. Gerginov, S. Weyers, E. Peik, Improved limit on a temporal variation of mp/me from comparisons of Yb+ and Cs atomic clocks. Phys. Rev. Lett. 210802(November), 1–5 (2014). https://doi.org/10.1103/PhysRevLett.113.210802
P.J. Mohr, D.B. Newell, B.N. Taylor, E. Tiesinga, Data and analysis for the CODATA 2017 special fundamental constants adjustment*. Metrologia 55, 125–146 (2018)
Practical realizations of the definitions of some important units, BIPM Webpage. https://www.bipm.org/en/publications/mises-en-pratique/. Accessed 16 Jul 2020
Information for users about the redefinition of the SI Webpage. https://www.bipm.org/utils/common/pdf/SI-statement.pdf. Accessed 16 Jul 2020
S. Yadav, D.K. Aswal, Redefined SI units and their implications. Mapan - J. Metrol. Soc. India 35(March), 1–9 (2020). https://doi.org/10.1007/s12647-020-00369-2
M. Stock, R. Davis, E. De Mirandés, M.J.T. Milton, Corrigendum: the revision of the SI—the result of three decades of progress in metrology (Metrologia (2019) 56 (022001). Metrologia, 56(4), 2019. https://doi.org/10.1088/1681-7575/ab0013, https://doi.org/10.1088/1681-7575/ab28a8
K. Blaum, D. Budker, A. Surzhykov, J. Ullrich, The revised SI: fundamental constants, basic physics and units. Ann. Phys. 531(5), 12–13 (2019). https://doi.org/10.1002/andp.201900148
CCM detailed note on the dissemination process after the redefinition of the kilogram, webpage. https://www.bipm.org/cc/CCM/Allowed/17/06B_CCM-DetailedNote_Dissemination-after-redefinition.pdf. Accessed 18 Jul 2020
J. Fischer, The Boltzmann constant for the definition and realization of the Kelvin. Ann. Phys. 531(5), 1–12 (2019). https://doi.org/10.1002/andp.201800304
A. Sperling, S. Kück, The SI Unit Candela. Ann. Phys. 531(5), 1–6 (2019). https://doi.org/10.1002/andp.201800305
Acknowledgements
Authors wish to express their whole hearted thanks to all the authors, organizations, members and students of CSIR-NPL past and present, whose works and activities are accommodated in this chapter. Authors also place on record our thanks for all even if the works of some of the organizations are not properly cited, which may be unintentional.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About this chapter
Cite this chapter
Yadav, S., Mandal, G., Shivagan, D.D., Sharma, P., Zafer, A., Aswal, D.K. (2020). International Harmonization of Measurements. In: Aswal, D.K. (eds) Metrology for Inclusive Growth of India. Springer, Singapore. https://doi.org/10.1007/978-981-15-8872-3_2
Download citation
DOI: https://doi.org/10.1007/978-981-15-8872-3_2
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-15-8871-6
Online ISBN: 978-981-15-8872-3
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)