Megger MIT525/2 Insulation Resistance Tester

Includes patented RE>ACT mode and PI Predictor for faster diagnostics, measuring up to 15TΩ with an accuracy of ±5% up to 1 TΩ, then ±20% up to 10 TΩ.

Features

  • Accuracy:
    • ±5% up to 1TΩ
    • ±20% up to 10TΩ
  • Resistance measurement up to 15TΩ at 5kV
  • RE>Act mode ensures accurate insulation measurements
  • Safety rated CAT IV 600V up to 3000m altitude
  • Test capability: IR, IR(t), PI, DAR, PI predictor (PIp), DD, ramp, PDC
  • User‑defined test voltages from 40V to 1kV in 10V steps
  • Fast‑charging Li‑ion battery, up to 6 hours operation
  • Operates from battery or AC mains supply

The Megger MIT525/2 insulation resistance tester provides accurate insulation resistance measurements for electrical systems. It measures resistance from 10kΩ up to 15TΩ. The MIT525/2 includes ±5% up to 1TΩ, and extended range up to 15 TΩ with reduced accuracy (±20% up to 10 TΩ). It features RE>ACT mode, which helps reduce errors caused by absorption currents, and the PI predictor function to speed up Polarization Index testing without sacrificing accuracy.

The device supports various test modes such as insulation resistance(IR), Polarization Index(PI), Dielectric Absorption Ratio(DAR), Dielectric Discharge(DD), Polarization Depolarization Current(PDC), and ramp testing, providing detailed information about insulation conditions. It has noise rejection up to 6mA, making it suitable for use in environments with electrical interference. Measurement results appear on a color display and can be saved with time and date stamps. Data can be transferred via USB or Bluetooth to software like CertSuite Asset.

The MIT525/2 runs on a battery, offering about 6 hours of continuous use at 5kV with a 100MΩ load. It can also be powered from AC mains and features auto power off to save battery life. The device has a rugged dual-case design with an IP65 rating when closed and meets CAT IV 600V safety standards for use up to 3000m altitude. It comes with a 3 meter medium clip insulated test lead set compliant with IEC safety standards, suitable for various insulation testing tasks.

Test Leads

Megger 6220-822 Control Circuit Test Leads
Megger 6220-822 Control Circuit Test Leads

3m (9.8ft) red and black lead set with 1kV insulated clips for MIT5/10 Series.

$225.00

Accessories

Please consider these optional accessories.

Megger CB101 5kV Calibration Box
Megger CB101 5kV Calibration Box

Calibration box suitable for checking the accuracy of insulation testers.

$575.00
Megger 1002-913 Fused 1kV HV Lead Set
Megger 1002-913 Fused 1kV HV Lead Set

For safe voltage measurements of​ ​5 & 10kV for use with MIT515, 525, & 1025 insulation resistance testers.

$305.00
Megger MIT Test Leads with Compact Clips
Megger MIT Test Leads with Compact Clips

10kV rated shielded test leads with bare test clips for MIT 5 &10kV.

Starting at $795.00
Megger 1005-817 10kV Screened Test Lead Set
Megger 1005-817 10kV Screened Test Lead Set

60ft lead set with compact clips for MIT5 & 10 series insulation resistance testers .

$1,260.00
Megger 1014-293 Test Lead Set
Megger 1014-293 Test Lead Set

Replacement red and black test lead set with crocodile clips.

$54.00