The Amprobe AM-530 True-rms Electrical Contractor Multimeter is the fully-featured multimeter of choice for the professional electrical contractor. Measure and verify presence of voltage in order to connect equipment or to perform repairs, run new wiring, check continuity of electrical connections, identify blown fuses, troubleshoot motors or check transformers. The AM-530 is true-rms sensing to accurately measure voltage on systems affected by harmonics as well as a built-in flashlight to detect wire colors in the dark, a “third hand probe holder and VolTect ™ non-contact voltage detection. Measures low DC Voltage (400 mV) ideal for use with any of our biasing test probes.