News

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NML sent its 1 kg International Prototype in Pt/Ir to BIPM for periodical calibration in April.  The artifact was obtained from BIPM in 1995 numbered 78.  To ensure the accuracy of mass and weight measurements, we have sent the primary standard back for re-calibration against the IPK at an interval of 10 years, i.e. in 2004 & 2014.

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