Megger MIT220 Insulation and Continuity Tester

  • Can perform continuity testing at 200mA, which ensures compliance for international requirements
  • The MIT220 has insulation ranges of 250V and 500V, and can run insulation testing to 1000MΩ
  • Comes with a durable carry case, a 2 Wire Test Lead Set, and a 3 year Megger manufacturer warranty
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Megger MIT220 Insulation and Continuity Tester

The Megger MIT220 Insulation and Continuity Tester will find applications in electrical contracting, both on domestic and industrial systems as well as site maintenance and service departments. The MIT220 insulation and continuity tester is ideal for testing transformers, motors, generators, switchgear, panel building, domestic appliances, power tools as well as fixed electrical wiring systems. The compact nature of the MIT 220 makes it ideal for engineers that need to carry them for extended periods. The MIT220 offers a range of safety and operation features. The display provides a combination of digital readout and analogue display using Megger’s patented DART display technology. The Megger MIT220 has the benefits of an LCD screen with clear and accurate measurement display and an analogue pointer response for evaluating circuit charge and discharge characteristics. This digital/analogue insulation and continuity tester's housing is in tough ABS, designed to withstand the rigours of hard use and is small enough to drop into your pocket when not in use.

Automatic continuity testing is performed at 200 mA to ensure compliance with international requirements. The Megger MIT 220 insulation and continuity tester will measure up to 100Ω on continuity, of which 0-10Ω is performed at greater than 200mA to meet international electrical testing requirements. Lead null is possible up to 9.99Ω of test lead resistance, ensuring the ability to null fused test leads as well as standard leads. The continuity buzzer operates at a 2 ohm threshold and provides a means of rapid cable testing and circuit identification, with voltage protection should you accidentally touch a live circuit. Insulation testing is possible up to 1000MΩ on both 250V and 500V ranges. Auto discharge ensures all circuits are safely discharged after testing.

Megger MIT220 tester Features:

  • Insulation ranges of 250V and 500V
  • Insulation testing to 1000 MΩ
  • Automatic continuity testing at 200 mA down to 0.01 Ω
  • Live circuit warning with voltage display and test inhibit
  • Test lead zero allows compensation for test lead resistance.
  • Digital/Analogue display
  • Automatic power-off if left unattended
  • Conforms to EN61557-1, CAT III 600V

What's In The Box?

  • Megger MIT220 250V/500V Insulation & Continuity Tester
  • Robust fitted carry case
  • 2 Wire Test lead set with prods and clips
  • Calibration Certificate issued by Megger
  • 3 Year Manufacturers Warranty
  • Insulation Ranges: 500V, 250V DC
  • Measuring Range: 10kΩ to 1000MΩ on all ranges
  • Terminal Voltage On Open Circuit (DC): 0% + 25% of rated voltage
  • Short Circuit Current: 205mA + 10mA - 5mA
  • Test Current on Load: >1mA at minimum pass values of insulation as specified in BS7671, HD384, IEC364 and VDE0413 Part 1
  • Accuracy (at 20°C):
    ±3% of reading ± 2 digits up to 10MΩ
    ±5% of reading ± 2 digits up to 100MΩ
    ±30% of reading up to 1000MΩ


  • Measuring Range: 0.01Ω to 100Ω (0-50Ω on analogue scale)
  • Open Circuit Voltage: 5V ± 1V
  • Short Circuit Current: 205mA, ±5mA (0 to 10Ω) > 20mA (0-100Ω)
  • Accuracy (at 20°):
    ±0.01Ω to 9.99Ω ±3% ± 2 digits
    10.0Ω to 99.9Ω ±5% ± 2 digits
  • Zero Offset Adjust: 0 to 9.99Ω
  • Continuity Buzzer: Operates at <2Ω


  • Voltmeter: <25V AC or DC
  • Test Inhibit: If more than 50V is detected, testing will be inhibited
  • Range: 25V to 600V @ 50/60Hz and DC
  • Accuracy:
    25V to 450V AC/DC ±1% ± 1 digit
    450V to 600V AC ±2% ± 1 digit

General Specifications

  • Auto Power Down: Operates after 10 minutes if left in standby mode
  • Temperature and Humidity Operating Range: -10 to +55°C (14 to 130°F)
  • Storage Range: -25 to +65°C (-13 to 150°F)
  • Environmental Protection: IP40
  • Fuse Terminals: 500mA (F) 600V, 32 x 6mm ceramic HBC 50kA minimum, display shows if fuse is ruptured
  • Safety: Meets the requirements of EN61010-1 CAT III 600V phase to earth
  • Automatic Discharge: After an insulation test the item under test will be discharged automatically. Any voltage present will be indicated on the display so that the discharge can be monitored
  • Power Supply:
    6 x 1.5V cells IEC LR6 (AA)
    Rechargeable NiMH cells may also be used
    Battery condition is constantly shown on the display so that the discharge can be monitored
  • Battery Life: 3000 consecutive test (5 seconds per test) on any testung 2Ah batteries
  • Weight: 500gms approximately (1.2lbs)
  • Dimensions: 195 x 98 x 40mm (7.7 x 3.9 x 1.6 inches)
  • E.M.C: In accordance with IEC 61326-1