Insulation Tester, rapid 50ms testing speed, 25 to 1000V test voltage with 1V resolution, insulation resistance test: up to 9990MOhm (at 500 to 1000V), Memory / Comparator / Timer function, Built-in external I/O and BCD output

The Hioki electrical safety testers are designed for insulation resistance and voltage withstand testing of electrical devices and components according to various safety standards. The ST5520-01 is the fastest insulation tester in the industry, delivering pass/fail assessment in as fast as 50 ms. 25 to 1000 V test voltage with 1 V resolution.