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
![Kibble balance](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/06/053019_ec_kilogram_feat_REV-2.jpg?fit=860%2C460&ssl=1)
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