electroscope

noun

1. measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign
   Terjemahkan ke Indonesia sumber: wordnet30
2. An instrument for detecting the presence of electricity, or changes in the electric state of bodies, or the species of electricity present, as by means of pith balls, and the like.
   Terjemahkan ke Indonesia sumber: webster1913