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  • Usually ships in 3-5 business days



  • Insulation Resistance 800kΩ to 500GΩ (autoranging)
  • Resolution 1kΩ
  • Basic Accuracy ±5%
  • Test Voltages 500VDC to 10kVDC (adjustable in 500V steps)
  • Preset Buttons 1kV, 2.5kV, 5kV, 10kV
  • Polarization index (PI) measurement
  • Dielectric absorption ratio
  • Voltage output warning
  • Automatic discharge


The Extech MG500 High Voltage Insulation Tester tests voltages up to 10kV and measures Insulation Resistance to 500GΩ. Designed inside a rugged hard case and includes heavy duty test leads and alligator clips. The MG500 featuresa polarization index and a dielectric absorption ratio measurements. The Enersave limits test duration to 10 seconds to save energy.

The Extech MG500 High Voltage Insulation Tester ships complete with:

  • Built-in heavy duty carrying case with cover
  • Test leads
  • Alligator clips
  • 8 x C batteries