gal·va·nom·e·ter 
(găl′və-nŏmĭ-tər)
(găl′və-nŏmĭ-tər)n.
An instrument used to detect, measure, and determine the direction of small electric currents by means of mechanical effects produced by a current-carrying coil in a magnetic field.
gal′va·no·metric (-nō-mĕtrĭk) adj.
gal′va·nome·try n.