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Extech MG320 CAT IV Insulation Tester/True RMS Multimeter
Extech MG320 CAT IV Insulation Tester/True RMS MultiMeter/Insulation Tester
Our Price: $421.29
Sale Price: $370.95
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Product Code: EXT-MG320

NIST Certificate (Adds 10-12 weeks):

The Extech MG320 Insulation Tester/True RMS Multimeter, CAT IV 20GΩ/1000V combines a portable 20GΩ/1000V Insulation Tester with a True RMS Multimeter. Insulation tester includes PI/DAR modes, programmable timer, and a comparator for custom test configurations and quick results. Multimeter functions include AC/DC Voltage, Resistance, and Continuity Test. Manually store/recall up to 99 readings.


  • Measure Insulation Resistance to 20GΩ
  • 5 Test Voltage ranges
  • Polarization Index (PI) and Dielectric Absorption Ratio measurements (DAR)
  • Low Resistance measurement with Zero function
  • Programmable Timer feature sets the duration of test
  • Comparison Mode allows user to set the Pass/Fail values for insulation measurements
  • Step Voltage (10% steps at 50% to 120% of range)
  • Auto-discharge of voltage test signal
  • Lock Power On Function for hands-free operation
  • Manually store/recall up to 99 readings
  • Backlit 6,000 count display with analog bargraph
  • High voltage and overload indication
  • Data Hold to freeze displayed reading
  • Auto Power Off and Low battery indication

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Manufacturers > Extech / Flir