Megger MIT40X CAT IV Insulation Tester
Need Help? Call 1-800-884-4967
Mo-Th 8am to 5:30pm. Fr 8am to 5pm ET


  • Insulation testing up to 1000 V and 200 GΩ
  • Analog arc and dual digital display
  • CAT IV 600 V rating
  • TRMS & DC Voltage measurement
  • IP54 rated

What's in the Box

  • Silicone test leads
  • Rubber boot with built-in stand
  • Carrying case
  • Info CD
  • 3yr warranty

The Megger MIT40X insulation resistance tester provides a new solution for unique insulation voltage measurement requirements. The MIT40X has a variable insulation test voltage from 10 V to 100 V in 1 V steps, selectable in the "Set-Up" menu.

Applications for the Megger MIT40X CAT IV:

  • Commercial avionics testing
  • Military land, marine and air communications testing
  • Manufacturing/production line testing
  • Electrostatic test and measurement
  • Component testing
  • Battery powered traction and lifting equipment testing

The MIT400 Series instruments are designed to meet all of the requirements of IEC1010-2 and EN61557 and meets the safety requirements for use on CAT IV 600 V. Also, fast detection circuitry prevents damage to the instruments if accidentally connected to live circuits or across phases. Specific safety features include:

  • Any live circuit detection inhibits any insulation testing on circuits above 50 V (75 volts on Telecom models)
  • Any live circuit detection and test inhibit on continuity measurements
  • Default display of live circuit voltage on all ranges
  • Detection and inhibit features function even if the protections fuse has failed


Minimum Test Voltage10 V
Maximum Test Voltage100 V
Maximum Reading20 GΩ
Data StorageNone
PC InterfaceNone
AlarmLimit Alarm
Please consider these optional accessories.
Megger 1002-001 Test Lead Set
Replacement red and black test lead set with crocodile clips
Megger 1007-157 SP5 Remote Probe
Replacement CAT IV 600 V switched test probe for the MIT400 Series Insulation Tester