Professional Tool Reviews for Pros

Klein Tools Insulation Resistance Tester ET600

Klein Tools Insulation Resistance Tester ET600

Klein ET600 Helps Suss Out Insulation Issues

Troubleshooting electrical issues can get tricky, but the Klein Insulation Resistance Tester can make the process a whole lot less ambiguous. The ET600 is perfect for electricians and maintenance Pros that install, troubleshoot, and maintain electrical wiring and equipment.



10-Second Summary

  • Model: Klein ET600
  • Tests insulation resistance up to 4000MΩ at 125V, 250V, 500V, and 1000V DC
  • Test and Lock buttons for simple insulation testing
  • Warning alarm and high voltage icon for detection of voltage
  • Measures up to 1000V AC/DC, low resistance, and continuity
  • Automatic ranging True Root Mean Square tech for better accuracy
  • Backlit display with bar graph, auto-power off, high voltage, max/min, and hold icons
  • Warranty: 2-year
  • Price: $149.99

What Klein Is Saying About the ET600

“A resistance tester is essential for professionals to verify that electrical insulation is intact, or if an electrical system is exhibiting leakage current that needs maintenance. Our Insulation Resistance Tester is built for testing at installation, during troubleshooting, or at annual maintenance.”

—Sabrina Kalsi, product manager at Klein Tools

Key Features

The Klein Insulation Resistance Tester tests insulation resistance up to 4000MΩ at 125V, 250V, 500V, and 1000V DC. Yes, that’s MEGAohms. It also measures up to 1000V AC/DC, and it looks for low resistance and continuity.

The ET600 features automatic ranging using True RMS technology for better accuracy, and for test verification, it conforms to EN61557-1, -2, and -4 specs. It also has a CAT IV 600V and CAT III 1000V safety rating. A warning alarm and visual indicator let you know when the ET600 detects voltage.

The Klein Insulation Resistance Tester also features a built-in stand so you can use it hands-free. Optionally, you can pick up a magnetic holder so you can hang it on an electrical box. The backlit display shows bar graphs, APO, High Voltage, Max/Min, and Hold icons as well.

The Klein ET600 runs on 6 AA batteries, and it comes with right-angle test leads and heavy-duty alligator clip test leads. You can pick it up for $149.99, and it comes with Klein’s 2-year limited warranty.

Klein Tools Insulation Resistance Tester Specs

  • Model: Klein ET600
  • Ohms: 4000MΩ
  • Standard: CAT IV 600V/CAT III 1000V, EN61557-1, EN61557-2, EN61557-4
  • Dimensions (LxHxW): 7.93 x 2.32 x 3.59 in.
  • Weight: 1.4 lbs.
  • Batteries: 6 x AA
  • Display: 4000 Count LCD
  • Functions: Insulation Resistance, Voltage AC/DC, Low Resistance, and Continuity
  • Voltage: 125V, 250V, 500V, and 1000V DC; 1000V AC/DC
  • Warranty: 2-year
  • Price: $149.99

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Richard Wurm

Please note that it measures up to 4000MegOhm. A substantial difference from just 4000ohms.

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