Insulation Resistance Tester


The ET600 Insulation Resistance Tester is perfect for electricians and maintenance professionals that install, troubleshoot, and maintain electrical wiring and equipment. This versatile tester features voltage test ranges from 125 to 1,000V, plus a convenient lock feature for hands-free insulation testing.


  • Test insulation resistance up to 4,000MΩ at 125, 250, 500, and 1,000V DC
  • Measures up to 1,000V AC/DC, low resistance, and continuity
  • Automatic ranging True Root Mean Square (TRMS) technology for increased accuracy
  • Test verification of conformity to EN61557-1, -2, -4
  • CAT IV 600V and CAT III 1,000V safety rating
  • Test and Lock buttons for simple insulation testing
  • Warning alarm and high voltage icon for detection of voltage
  • Backlit display with bar graph, APO, High Voltage, Max/Min, and Hold icons
  • Built-in stand and optional magnetic holder for hands-free operation
  • Includes both Right Angle Test Leads and Heavy-Duty Alligator Clip Test Leads
  • Low battery indicator with easily replaceable battery and fuse
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