A multimeter such as the Tektronix DMM 4020 is a tool used to measure two or more electrical values. These values are usually voltage, current, and resistance. It is most commonly seen as a diagnostic tool used by electricians to find issues within circuits.

The DMM 4020 in particular can look at both AC and DC voltages and currents - no electrical project is off limits. It is a powerful and accurate multimeter suited for almost any benchtop electrical project.