Kibble balance
Balanza de Watt
- Date
- 1975 · confidence high
- Place
- Teddington, London, United Kingdom
- Credited to
- Bryan Kibble
- Field
- Knowledge & symbols
What it is
A precision electromechanical instrument that determines an object's mass by comparing it with an electromagnetic force generated by a measurable current and voltage, linking the kilogram to fundamental physical constants; devised by Bryan Kibble at the National Physical Laboratory.
What it led to
- Redefinition of the kilogram based on the Planck constant (2019)
- End of reliance on the International Prototype Kilogram
- Mass metrology traceable to universal constants