The Fluke 1503 Insulation Resistance Tester is the ideal tool for testing insulation resistance on electrical equipment. It features a wide measurement range of 0.01 MΩ to 10 GΩ, making it suitable for testing a variety of equipment, including motors, generators, transformers, and cables. The 1503 also features a high-resolution display that provides clear and accurate readings, even in low-light conditions. Additionally, the 1503 is equipped with a built-in continuity tester, which can be used to quickly and easily test for continuity in electrical circuits.