Sandia Lab weighs in on new definition for kilogram

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Hy Tran examines a kilogram sample in a mass comparator at Sandias Primary Standards Laboratory. Credit: Randy Montoya
Hy Tran examines a kilogram sample in a mass comparator at Sandia’s Primary Standards Laboratory. Credit: Randy Montoya

The kilogram is losing weight and many international scientists, including some at Sandia National Laboratories, agree that it’s time to redefine it. Scientists are hoping to redefine the kilogram by basing it on standards of universal constants rather than on an artifact standard.


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