Digital Multimeters (DMMs) are essential industrial test and measurement instruments used to measure electrical parameters such as voltage, current, resistance, and continuity with high accuracy. Featuring digital displays, auto-ranging capabilities, and advanced functions like data logging and connectivity (USB/Bluetooth), they are widely used in electrical maintenance, automation, and quality control. Rugged designs with CAT safety ratings ensure reliability in harsh industrial environments. Brands like Fluke, Keysight, and Hioki offer specialized models for applications in power systems, HVAC, and electronics manufacturing.