26th General Conference on Weights and Measures

E57428

General Conference on Weights and Measures diplomatic conference international scientific conference

The 26th General Conference on Weights and Measures was the 2018 international meeting where member states adopted a landmark revision of the SI, redefining several base units in terms of fundamental physical constants.

Observed surface forms (1)

Surface form	Occurrences
General Conference on Weights and Measures	1

Statements (50)

Predicate	Object
instanceOf	General Conference on Weights and Measures ⓘ diplomatic conference ⓘ international scientific conference ⓘ
adopted	CGPM resolutions ⓘ surface form: Resolution 1 (On the revision of the International System of Units, the SI) fixed numerical value of the Avogadro constant NA ⓘ fixed numerical value of the Boltzmann constant k ⓘ fixed numerical value of the Planck constant h ⓘ fixed numerical value of the elementary charge e ⓘ landmark revision of the SI ⓘ multiple resolutions concerning the SI ⓘ redefinition of the ampere ⓘ redefinition of the kelvin ⓘ redefinition of the kilogram ⓘ redefinition of the mole ⓘ revised definitions of all seven SI base units ⓘ
basedOn	fundamental physical constants ⓘ quantum electrical standards ⓘ thermodynamic temperature scale ⓘ
confirmedDefinitionOfUnit	candela ⓘ metre ⓘ second ⓘ
convenedBy	International Bureau of Weights and Measures ⓘ
country	France ⓘ
effectiveDateOfNewDefinitions	2019-05-20 ⓘ World Metrology Day 2019 ⓘ
endDate	2018-11-16 ⓘ
followedBy	27th General Conference on Weights and Measures ⓘ
goal	ensure long-term stability of SI units ⓘ improve universality and accessibility of SI realizations ⓘ
hasNumberOfMemberStatesRepresented	member states of the Metre Convention ⓘ
location	France ⓘ Château de Versailles ⓘ surface form: Palace of Versailles Versailles ⓘ Île-de-France region ⓘ surface form: Île-de-France
mainTheme	redefinition of SI base units using fundamental physical constants ⓘ
ordinalNumber	26 ⓘ
organizedBy	General Conference on Weights and Measures ⓘ surface form: General Conference on Weights and Measures (CGPM)
partOf	series of General Conferences on Weights and Measures ⓘ
precededBy	25th General Conference on Weights and Measures ⓘ
redefinedUnit	ampere ⓘ kelvin ⓘ kilogram ⓘ mole ⓘ
significance	ended dependence of the kilogram on a material artefact ⓘ marked the most extensive revision of the SI since its creation ⓘ
startDate	2018-11-13 ⓘ
subjectOf	revision of the International System of Units ⓘ
timePeriod	2010s ⓘ 21st century ⓘ November 2018 ⓘ

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Boltzmann constant → fixedBy → 26th General Conference on Weights and Measures ⓘ

International System of Units → governingBody → 26th General Conference on Weights and Measures ⓘ

this entity surface form: General Conference on Weights and Measures