he UNI-T UT575B Insulation Resistance Tester is a professional instrument designed for accurate and reliable insulation testing of electrical systems. Ideal for checking cables, motors, transformers, and electrical installations, it helps detect insulation faults and ensure safety compliance. With stable performance, easy operation, and a durable handheld design, the UT575B supports preventive maintenance, reduces risk, and gives technicians confidence in electrical safety testing.