The mobile circuit galvanometer.
The mobile circuit galvanometer, a galvanometer improved by Arsène d’Arsonval in association with Marcel Deprez in 1880. Instead of a magnetised needle moving when electrical current flows through a surrounding wire coil the Deprez-d'Arsonval galvanometer has a fixed magnet and moveable coil. If a pointer is attached to the coil it can move over a suitably calibrated scale. The d'Arsonval galvanometer is the basis for most modern galvanometers.
Comptes rendus de l’Académie des sciences, 1882, 94: 1347-1350.
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