HIOKI Insulation Tester IR4057-50

Hioki IR4057-50 Insulation Tester All-in-One | 50–1000 V | CAT III 600 V The Hioki IR4057-50 is a 5-range digital insulation tester with selectable 50–1000 V test voltages, fast 0.3s PASS/FAIL check, and up to 4000 MΩ measurement. Rugged, drop-proof, and safety rated, it’s built for electricians and field use. Key Benefits: 50 V to 1000 V, 5 test ranges All-in-one rugged design with lead storage Bargraph display for fast visual assessment CAT III 600 V safety rated for industrial use

• 5 selectable test voltages (50 V to 1000 V) — supports insulation resistance from 100 MΩ up to 4000 MΩ.
• Rapid PASS/FAIL comparator — ~0.3-second response with visual & audio indication for quick field decisions.
• Built-in AC/DC voltage meter & continuity check — lets you inspect live circuits or verify safety conductors without switching tools.
• Tough, jobsite-ready design — drop proof from 1 m, luminous backlit display & bright LED for use in low light conditions.
• Live-circuit indicator & automatic discharge — protects both user and device by warning of live voltage and safely discharging after tests.