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The Next Generation of the NIST Watt Balance



David B. Newell, Richard L. Steiner, Edwin R. Williams, Alain Picard


Reduction in the total uncertainty of the NIST Watt Balance is limited by the present configuration of the experiment. Most of the major relative uncertainty components arise from the fact that the experiment is performed in air. To reduce the contribution of these components, a vacuum system for the NIST Watt Balance has been constructed. The vacuum system and other future modifications to the NIST Watt Balance are discussed.
Proceedings Title
Tech. Dig., Conf. on Precision Electromagnetic Measurements
Conference Dates
July 6-10, 1998
Conference Location
Washington, DC


fundamental constant, planck's constant, SI watt, kilogram monitoring


Newell, D. , Steiner, R. , Williams, E. and Picard, A. (1998), The Next Generation of the NIST Watt Balance, Tech. Dig., Conf. on Precision Electromagnetic Measurements, Washington, DC, [online], (Accessed April 21, 2024)
Created July 31, 1998, Updated October 12, 2021