Galvanometer /(?)/

Gal·va·nom·e·ter

Galvanometer

n.
  1. An instrument or apparatus for measuring the intensity of an electric current, usually by the deflection of a magnetic needle. (Elec.)

Phrases & Compounds
Differential galvanometer
See under Differental, a.
Sine galvanometer
a galvanometer in which the sine, cosine, or tangent respectively, of the angle through which the needle is deflected, is proportional to the strength of the current passed through the instrument.