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First mass measurements with the NIST-4 watt balance



Darine El Haddad, Leon S. Chao, Frank C. Seifert, David B. Newell, Jon R. Pratt, Stephan Schlamminger


In the past four years, we have constructed a new watt balance at the National Institute of Standards and Technology (NIST), with the goal to realize the unit of mass after the redefinition of the International System of Units, expected to occur in 2018. The new watt balance has been operational since the fall of 2015 and we describe our first measurements with it.
Proceedings Title
CPEM 2016 Conference Digest
Conference Dates
July 10-15, 2016
Conference Location
Conference Title
Conference on Precision Electromagnetic Measurements (CPEM)2016


fundamental electrical measurements, mass metrology, Planck constant, revised SI, SI units, watt balance


El, D. , Chao, L. , Seifert, F. , Newell, D. , Pratt, J. and Schlamminger, S. (2016), First mass measurements with the NIST-4 watt balance, CPEM 2016 Conference Digest, Ottawa, -1, [online], (Accessed April 21, 2024)
Created July 10, 2016, Updated November 29, 2019