Amprobe PRM-4 Phase Sequence and Motor Rotation Tester

The Amprobe PRM-4 Phase Sequence and Motor Rotation Tester is a 2-in-1 precision electrical test tool that is perfect for installing conveyor lines, pump systems, and interconnected drivers. This PRM-4 tester accurately measures the phase sequence of a three-wire system, checks open phase and measures motor shaft rotation with the use of a nine-volt battery. It features a three-phase load of nearly seven milliamps per phase of AC power source.