This tabletop device turns the quantum definition of a kilogram into a real mass
The mini Kibble balance will measure 10 grams to a few ten-thousandths of a percent accuracy
WEIGH IN Small enough to fit on a table, this mini Kibble balance measures smaller units of mass, such as a few grams, to an accuracy of a few ten-thousandths of a percent. A Lego figurine (top right) holds a 1-gram mass for scale.
Leon Chao/NIST