New value for the Planck constant may hasten electronic kilogram
Wednesday, January 15, 2014 - 10:30
in Physics & Chemistry
(Phys.org) —After two years of difficult and meticulous work examining, refurbishing, and testing the aging workhorse watt balance called NIST-3, PML researchers have used the instrument to obtain their latest measured value of the Planck constant – the first to be released since 2007, and presumably the last to be measured on NIST-3 before its successor, NIST-4, begins operation later this year.