Analog ammeters are metered instruments that measure current flow in amperes.

Shunts resistors are connected in parallel with an instrument or component to divert electrical current.

Digital ammeters are instruments that measure current flow in amperes and display current levels on a digital display.

Clamp meters are ammeters that can measure current without the need to disconnect the wires where the measurement occurs.

Analog multimeters are instruments that are used to measure electrical quantities such as voltage, current, resistance, frequency and signal power

Digital multimeters (or multi-meters) are used to measure electrical quantities such as voltage, current, resistance, frequency, temperature, capacitance, and time period measurements.

DC motors are most commonly used in variable speed and torque applications.