An ammeter is a device which measures the flow of electrical current. The current may be either continuous (DC) or alternating (AC) and is measured in amperes (A), microamps (mA) or milliamps (µA).

Unlike a voltmeter, an ammeter is normally inserted in series with the circuit being measured.

Indirect measurement of current is also possible, typically with larger currents, through the use of a clamp meter or current transformer.

Related Topics