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• Galvanometer

  A galvanometer is an electromechanical instrument used for detecting and indicating an electric

• Mirror galvanometer

  A mirror galvanometer is an electromechanical instrument that indicates that it has sensed

• String galvanometer

  The string galvanometer, also known as the Einthoven galvanometer, invented around 1901 by Dutch

• Thermo galvanometer

  The thermo-galvanometer is an instrument for measuring small electric currents. It was invented

• E-meter

  The E-meter is an electronic device for displaying the electrodermal activity (EDA) of a human being. The device is used for auditing in Scientology and divergent groups. The efficacy and legitimacy of Scientology's use of the E-meter has been subject to extensive debate and litigation and in accordance with a federal court order, the Church of Scientology now publishes disclaimers in its books and publications declaring that the E-meter "by itself does nothing" and that it is used specifically for spiritual purposes.

• Frog galvanoscope

  The frog galvanoscope was a sensitive electrical instrument used to detect voltage in the late eighteenth and nineteenth centuries. It consists of skinned frog's leg with electrical connections to a nerve. The instrument was invented by Luigi Galvani and improved by Carlo Matteucci. The frog galvanoscope, and other experiments with frogs played a part in the dispute between Galvani and Alessandro Volta over the nature of electricity. The instrument is extremely sensitive and continued to be used well into the nineteenth century, even after electromechanical meters came into use.

• Vibration galvanometer

  A vibration galvanometer is a type of mirror galvanometer, usually with a coil suspended in the gap

• Ballistic galvanometer

  A ballistic galvanometer is a type of sensitive galvanometer; commonly a mirror galvanometer

• Johannes Bosscha

  doctoral degree (promotor Pieter Rijke) with a thesis on galvanometry. After a brief sojourn in Berlin he returned to the physics department in Leiden.

• Jacques-Arsène d'Arsonval

  , and inventor of the moving-coil D'Arsonval galvanometer and the thermocouple ammeter. D'Arsonval