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MIT320 Digital Insulation Tester

Megger MIT320 Digital Insulation & Continuity Tester for Electricians comes with extra features like: insulation limit alarm (0.01 Megaohm to 999 Megaohms), adjustable buzzer 1 to 20 ohms, 10 ohms to 1 Megaohms resistance measurement range, backlit display, plus includes a switched test probe.

Part Number:

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Manufacturer's RRP

726.00 incl. VAT)
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Megger MIT320 Digital Insulation and Continuity Tester

The Megger MIT320 Digital Insulation and Continuity Tester features the popular Megger digital/analogue display complete with large 20mm high characters providing a very clear readout, combined with an analogue arc makes for an ‘analogue instrument‘ feel, with a true analogue response.


Megger MIT320 Key Features:

  • Tough:
    • Designed to take the bashing that testers receive on site, the Megger MIT insulation testers are rubber armoured
    • The rigid display cover folds right out of the way during testing and locks down to protect the display when it is finished
    • Weatherproof to IP54
  • Simple to use:
    • No buried functions mean it is obvious how to use the Megger MIT
    • Colour coded ranges help test selection, reducing testing time and help with fault location.
    • A user guide in the lid provides all the basic information.
  • Hands free use:
    • It hangs comfortably around the neck for hands-free use because the instrument is carefully balanced.
    • Continuity and buzzer testing starts automatically on connection to the circuit.
    • Insulation tests being activated from the instrument or the supplied switch probe
  • Backlighting:
    • Both the display and the range selected can be read in the dark because the backlit display and range selection
  • Safety features:
    • To protect the user and the tester from incorrect use the MIT series all have an extensive range of features known as the Megger Intelligent Safety System including:
      • Safety Interlock – Prevents unsafe connection of test leads
      • Safe contact detectors – Even if the MIT is connected to a live circuit whilst on continuity setting the tester will remain safe and not be damaged
      • Safety lockout – Prevents the test from operating when the circuit voltage is >50 V
      • Continuity check – Prevents a continuity test or buzzer test on a live circuit
  • USB interface
  • 3 years warranty

The MIT300, 310, 320 and 330 meet or exceed the UK and International Wiring Regulations, including requirements of BS7671 and VDE 0413 parts 1 and 4, HD 384, IEC 364, NFC15-100, NEN3140, ES59009 and EN 61557. In addition the range meets the requirements of IEC 61010-1 for safe connection to a 440 V Installation Category III supply (600 V Phase to Earth).


▶ Getting started with the Megger MIT Range:


What comes with the Megger MIT320?

  • Megger MIT320 Insulation and Continuity Tester
  • Test Leads Set with Crocodile Clips (1002-001)
  • SP4F Switched Probe (6220-809)
  • Manufacturer‘s Calibration Certificate


▶ What‘s in the box for the Megger MIT Range:


Comparison Chart for: Megger MIT320 Digital Insulation Tester

Insulation testing
250 V
500 V
1000 V
Test range999 MΩ999 MΩ999 MΩ999 MΩ999 MΩ
Insulation limit alarm (0.01 MΩ to 999 MΩ)
Continuity testing
Continuity to 100 Ω
Continuity buzzer
Lead null to 9ohms0.5 Ω
Adjustable buzzer 1 to 20 Ω
Audible buzzer disable
Voltage measurement
Volts AC/DC600 V600 V600 V600 V
Resistance measurement
10 Ω to 1 MΩ range
Voltage warning
Default voltmeter
Backlit display
Backlight selector ranges
Locking test button
Auto powerdown
Switched test probe
IP54 weatherproof
Accepts rechargeable batteries
1000 Test result storage
Calibration certificate
3 years warranty
The MIT Range
Voltage rangeUp to 1000 VUp to 1000 VUp to 1000 VUp to 500 V
Test Range1000 MΩ1000 MΩ200 GΩ100 GΩ
Voltage Measurement600 V600 V600 V
On board Memory
Rechargeable batteriesOnly available in MIT 485/2
Product Downloads


Accessory Code Description Price (Ex VAT)
1000-562 Probe Cap [clear] bag of 20 £26.00 ADD
1002-001B Standard test leads (Red/Black) with prods and clips (NEW) right angle plugs £46.00 ADD