• Extech MG302 13 Function Wireless True RMS MultiMeter/Insulation Tester

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

The MG302 is a true RMS multimeter with a built-in insulation resistance tester and 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. 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 4GΩ with 0.001MΩ resolution. The full-function, true RMS digital multimeter includes useful extras, like duty cycle measurements and milliamp readings for analog 4-20mA 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. The MG302 comes with a remote USB receiver, Windows compatible software, test leads with alligator clips, Type K bead wire temperature probe with adapter, carrying case, six AA batteries, and user manual.


  • 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



Specifications                                         Range
Insulation Tester                                                                                                                                

  Insulation Resistance                          4MΩ, 40MΩ, 400MΩ, 4000MΩ
  Insulation Test Voltages                    125V, 250V, 500V, 1000V
Multimeter
AC Voltage                                             1000V
DC Voltage                                             1000V
AC Current                                             10A
DC Current                                             10A
Resistance                                              40MΩ
Capacitance                                           40mF
Frequency                                             100MHZ
Duty Cycle                                             0.1 to 99.9%
Temperature                                        -58 to 1832°F
                                                              -50 to 1000°C
4-20mA%                                              -25 to 125%
Continuity/Diode                                Yes
Power source                                       6 x AA batteries
Dimensions                                          7.8 x 3.6 x 1.9” (200 x 92 x 50m
Weight                                                  20.5oz (582g)


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Extech MG302 13 Function Wireless True RMS MultiMeter/Insulation Tester


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