Electrical meters

thumb|Demonstration model of a moving iron ammeter. As the current through the coil increases, the plunger is drawn further into the coil and the pointer deflects to the right.

thumb|Demonstration analog voltmeter

thumb|Analog multimeter thumb|Digital multimeter

measuring instrument in electricity

thumb|An analog ohmmeter

thumb|upright|Wattmeter

thumb|Kolbe electrometer, precision form of gold-leaf instrument. This has a light pivoted aluminum vane hanging next to a vertical metal plate. When charged the vane is repelled by the plate and hangs at an angle.

measuring instrument

measuring instrument

meter that displays the frequency of an electronic signal

Tool to measure electrostatic potentials

device which measures the electrical waves on an electricity grid