Electricity meter
device · 1889 · Electric age
A device for metering electricity.
What it is made of
- Rotating aluminium disc — has part. It is turned by eddy currents.
- Current and voltage coils — has part. They create fields proportional to current and voltage.
- Counter register — has part. Gears count the revolutions of the disc.
- Permanent magnet — has part. A braking magnet.
Principles and materials it uses
- Electromagnetic induction — uses. An induction meter has a rotating disc.
- Aluminium — is made of. An aluminium disc rotates.
- Copper — is made of. The coils are copper.
History: what it evolved from and what it influenced
- Smart meter — evolved into. A digital meter.