The BIPM Kibble Balance for the Realization of the Redefined Kilogram

This paper reports the latest status of the Kibble balance experiment that the BIPM is developing for the realization of the upcoming redefined mass unit. The apparatus is now capable of working with a mass of 1 kg and fully operational in vacuum with a day-to-day repeatability at the 10 −7 level. Studies are being conducted to evaluate various corrections such as those due to the coil-current effect and the self-attraction correction.