Harris, Forest K. Electrical Measurements Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland.
Dziuba, Ronald F. Electrical Measurements Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland
Kibble, Bryan P. Formerly, Division of Electrical Science, National Physical Laboratory, Teddington, Middlesex, United Kingdom.
Last reviewed:January 2020
- D'Arsonval galvanometer
- Portable galvanometers
- Ballistic galvanometer
- Related Primary Literature
- Additional Reading
A device for indicating very small, usually direct, electric currents. Although the deflection of a galvanometer results from current in the moving coil, the voltage in a closed circuit producing this current is frequently the quantity of interest to the user. In this mode, galvanometers are used to detect a null or an unbalanced condition in a bridge or potentiometer circuit. Galvanometers have played a pivotal role in the evolution of electrical measurements but electronic instruments that employ amplifying circuits to achieve sensitivities approaching the nanovolt level are now more frequently used instead.
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