EXTECH MG302 13 Function Wireless True RMS MultiMeter/Insulation Tester


MultiMeter/1000V Insulation Tester with Wireless PC interface (433MHz)

Combines a 1000V Insulation Tester With a full-featured True RMS MultiMeter in a single, compact instrument


  • Wireless USB interface transmits measurement data to a PC
  • Backlit super large triple display
  • 125V, 250V, 500V, and 1000V test voltages
  • Insulation Resistance from 0.001MOhm to 4000MOhm
  • Auto discharge of capacitive voltage
  • Lock Power On Function for hands-free operation
  • Data Hold, Min/Max, Relative mode, Auto power off
  • Complete with USB receiver, Windows® software, test leads & alligator clips, bead wire temperature probe, carrying case and batteries

Authorised Australian Distributor

CE   FCC   IP67   CAT IV   1 Year

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EXTECH  MG302 13 Function Wireless True RMS MultiMeter/Insulation Tester

Designed for users outside of North America because of its 433 MHz wireless transmitter frequency, the Extech MG302 is a true RMS multimeter with built-in insulation resistance tester with the added safety of wireless data streaming for remote monitoring and data recording. By adding insulation testing capabilities to this CAT IV-rated digital multimeter, electrical troubleshooters will always be equipped for insulation testing, helping to make it a more routine part of predictive maintenance with faster troubleshooting and repairs without the need for additional tools.

MG302 Features Overview

The rugged and waterproof (IP67-rated) combination meter includes a digital insulation resistance tester (or megohmmeter) with four different test voltages for measuring resistance up to 4 GΩ with 0.001 MΩ resolution. The full-function, true RMS digital multimeter includes useful extras, like duty cycle measurements and milliamp readings for analog 4-20 mA current loops in industrial analog process controls. The MG302 also has built-in wireless data recording for safer troubleshooting and maintenance on moving equipment, one-person operation of remote safety switches, and the ability to monitor real-time readings on a laptop or computer screen from safe distances — up to 30 feet away — to detect intermittent anomalies.


Insulation testers can be used to test motor, transformer windings, instruments, and appliances, check for moisture in wire and cable assemblies, safely evaluate a new wiring installation, and check for carbon tracking in breakers, relays, and switches. Extech Insulation Testers offer high sensitivity to assure reliable monitoring of low resistance motor windings.


Product Type Insulation Testers
Display LCD
DC voltage range 1000 V
DC voltage accuracy ±0.06%
Insulation resistance resolution 0.001 MΩ
Insulation test voltages 125 V, 250 V, 500 V, 1000 V
AC current resolution 0.001 A
Power (6) AA batteries
Dimensions 7.8″ H x 3.6″ W x 1.9″ D
Resistance Measurement 40 MΩ
DC current range 10 A
DC current accuracy ±1.0%
Insulation resistance accuracy ±3%
Resistance Accuracy ±3%
AC voltage resolution 0.1 V
AC voltage range 1000 V
DC voltage resolution 0.1 V
Resistance Resolution 0.0001 MΩ
Weight 1 kg


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