TES
Insulation Tester TES 3660
The TES 3660 is a high-accuracy auto-range insulation tester designed for professional electricians, engineers, and maintenance technicians. With multiple test voltages, automatic ranging, and advanced safety protection, the TES 3660 delivers reliable insulation resistance measurements for industrial, commercial, and electrical installations. Its rugged design and easy-to-read display make it ideal for field and laboratory testing.