Extech MG325: CAT IV Insulation Tester/True RMS MultiMeter

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  • $439.99
  • Regular price $549.99


200GOhm/1000V Insulation Tester/DMM with Datalogging

Combines a 200GΩ/1000V high range Insulation Tester with a full-featured True RMS MultiMeter in a single, compact instrument. CAT IV safety rating ensures the highest level of protection.

Product Specs
Specifications Range Resolution Basic Accuracy
Insulation Resistance 50MΩ, 100MΩ, 200MΩ,500MΩ, 2000MΩ, 1GΩ, 10GΩ, 20GΩ, 50GΩ, 100GΩ, 200GΩ 0.001MΩ ±(3%+3d)
Insulation Test Voltages 50V, 100V, 250V, 500V, 1000V _ 0 to 20%
AC/DC Voltage 600V 0.01V AC: ±(1.5%+5d)/ DC: ±(2%+3d)
Leakage Current 2000µA 10µA ±(10%+3d)
Resistance 10MΩ 0.01kΩ ±(3%+3d)
Low Resistance 100Ω 0.01Ω ±(1.5%+5d)
Capacitance 500µF 0.1nF ±(5%+5d)
Frequency 1kHZ 0.1HZ ±(0.1%+3d)
Continuity (audible) Yes
Dimensions/ Weight 8.9 x 4.1 x 2.3" (225 x 103 x 59mm)/ 1.5lbs (0.7kg)
  • Test Voltages of 250V, 500V, and 1000V
  • Measure Insulation Resistance to 5.5GOhm (autoranging)
  • AC Voltage measurement from 30 to 600V
  • Polarization Index measurement (PI)
  • Dielectric Absorption Ratio measurement (DAR)
  • 10MOhm internal resistance test
  • Low Resistance measurement with Zero function
  • Continuity beeper
  • Large 2000 count dual display with backlight
  • High voltage and overload indication
  • Auto-discharge and voltage output warning functions
  • Low battery indication
  • Complete with test leads, alligator clips, 6 AA batteries, hard cover, and soft carrying case

Free Shipping


Our policy lasts 30 days. If 30 days have gone by since you received purchase, unfortunately we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.