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Beginning a new phase of the dissemination of the kilogram
Following completion of the first key comparison of realizations of the kilogram, CCM.M-K8.2019, the internationally coordinated dissemination of the kilogram is entering into a new phase. From 1 February 2021, the traceability of the mass unit to the Planck constant will be taken from the 'consensus value' of the kilogram.
BIPM Kibble balance makes significant progress towards realizing the new kilogram definition in 2019
Significant progress towards the completion of the BIPM Kibble balance for realizing the new kilogram definition has been made in 2019. The BIPM will participate in the first key comparison of realizations of the new definition of the kilogram, CCM.M-K8.2019.
Review paper in Metrologia: "The revision of the SI - the result of three decades of progress in metrology"
Following three decades of intensive work by the world-wide metrology community, the 26th meeting of the CGPM agreed a major revision of the SI on 16 November 2018. This open-access review paper in Metrologia describes the changes.