Weston standard cell (cadmium)
Pila patrón de Weston (cadmio)
- Date
- 1893 · confidence high
- Place
- Newark, New Jersey, United States
- Credited to
- Edward Weston
- Field
- Matter & energy
What it is
A cadmium-mercury cell that keeps a very stable voltage of 1.018 V, almost independent of temperature. It was the international voltage standard until the Josephson effect replaced it.
What it led to
- international volt standard (adopted 1908)
- calibration of voltmeters and potentiometers
- precision electrical metrology until 1990