The Hioki IR4057-50 Insulation Tester features an all-in-one design, built-in rugged case and test lead storage compartment. The IR4057-50 is a 5-range, 50 V to 1000 V digital insulation resistance tester with bar graph, and delivers efficient functions and features to help shorten work time associated with field insulation testing. It performs EV and HEV continuity checks as well as resistance measurement of safety conductors in building electrical equipment as defined by IEC 60364.

Compare measured values to pre-set reference values to generate a pass or fail judgment with the Comparator function. The insulation tester gives pass/fail results using a beeping sound, LCD light, and indication right on the test lead with remote control switch (option), letting you check for insulation integrity without needing to look at the instrument.

It features a robust design that can withstand being dropped onto concrete from a height of 1 m. Difficult to damage, this insulation tester is ideal for use in the field. The scale is lit by a white LED, ensuring that insulation resistance values are easy to read, even when using the instrument in a dim location. The measurement switch can be operated with just the thumb. Press for a single measurement or lift up for continuous measurement of insulation resistance.