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The Permanent Magnet System for NIST-4



Stephan Schlamminger


At the National Institute of Standards and Technology a new watt balance, NIST-4, is currently being designed. This apparatus will be used to realize the base unit of mass after the redefinition of the SI has taken effect. As a realization device, NIST-4 shall be easy to use and of low maintenance. Guided by these requirements we decided to use a permanent magnet sys-tem to generate the magnetic flux for NIST-4. A brief overview of the permanent magnet system is given.
Proceedings Title
CPEM 2012 Digest
Conference Dates
July 1-6, 2012
Conference Location
National Harbor, MD
Conference Title
CPEM 2012


NIST, Planck constant, watt balance, SI units


Schlamminger, S. (2012), The Permanent Magnet System for NIST-4, CPEM 2012 Digest , National Harbor, MD (Accessed March 3, 2024)
Created July 2, 2012, Updated February 19, 2017