Insulation Testers are specialized electrical testing devices used to measure the integrity and resistance of insulation in wires, cables, and electrical equipment. These tools are essential for preventive maintenance, ensuring safety, and compliance with industry standards. They typically feature high-voltage testing capabilities, digital displays, and durable designs for industrial environments. Common applications include testing motors, transformers, and switchgear in manufacturing, utilities, and construction. Key brands like Megger, Fluke, and Hioki offer models with advanced features such as automated testing, data logging, and rugged portability for field use.