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Megger MIT420/2 Insulation Tester (1kV / 200 GΩ)
The Megger MIT420/2 is a professional-grade CAT IV 600V insulation resistance and continuity tester engineered for demanding industrial, utility, and aerospace maintenance. Featuring feedback-controlled test voltages from 50V to 1000V (plus variable 10V–1000V), measurement up to 200 GΩ, automated PI/DAR calculations, and on-board storage for over 1,000 test results, it delivers bench-grade accuracy in a rugged IP54 weatherproof housing.
Megger MIT420/2 Insulation Tester — CAT IV with Result Storage
The Megger MIT420/2 is a rugged CAT IV 600 V insulation and continuity tester from the MIT400/2 range, adding on-board storage for over 1000 test results to a full 50–1000 V range, measurement to 200 GΩ and PI/DAR diagnostics. With fast continuity and true-RMS voltage measurement in an IP54 handheld, it is ideal for professional testing that needs record-keeping, to EN 61557.
What’s in the Box
What comes with the MIT420/2:
- Megger MIT420/2 insulation tester
- Test lead set (red/black) with probes and clips
- SP5 switched probe
- 6 × AA alkaline batteries and hard carry case
- Calibration certificate and owner information
Description
Key Features
What the Megger MIT420/2 covers on site:
- Insulation testing — 50, 100, 250, 500 and 1000 V DC test voltages measuring up to 200 GΩ.
- Result storage — on-board memory for over 1000 test results.
- PI & DAR diagnostics — polarisation-index and dielectric-absorption-ratio timers.
- Continuity testing — 200 mA or 20 mA, one auto range from 0.01 Ω to 999 kΩ, adjustable buzzer limit (1–200 Ω).
- True-RMS voltage — DC 0–600 V and true-RMS AC 10 mV–600 V (15–400 Hz).
- CAT IV 600 V & IP54 — rugged, dust- and splash-resistant for industrial use.
- Long battery life — about 3000 insulation tests from 6 × AA cells (alkaline or NiMH); 228 × 108 × 63 mm.
Applications
The MIT420/2 is ideal for electricians and industrial maintenance teams needing insulation-resistance and continuity testing with result storage — on cables, motors, switchgear and installations — for documented preventive maintenance to EN 61557.
Technical Specifications
| Specification Parameter | Value / Range |
| Brand / Manufacturer | Megger Ltd. |
| Model | MIT420/2 (Part No. 1004-739 / 1006-740) |
| Insulation Test Voltages | 50 V, 100 V, 250 V, 500 V, 1000 V |
| Variable Test Voltage | 10 V to 1000 V (adjustable in 1 V steps) |
| Test Voltage Accuracy | -0% / +2% ± 2 V |
| Insulation Resistance Range | 10 GΩ (at 50 V) up to 200 GΩ (at 1000 V) |
| Leakage Current Display | 0.1 µA to 2000 µA |
| Diagnostic Test Ratios | Polarization Index (PI) and Dielectric Absorption Ratio (DAR) |
| Continuity Testing | Auto-ranging 0.01 Ω to 999 kΩ (at 200 mA or 20 mA) |
| Continuity Lead Null | Up to 9.00 Ω |
| Voltage Measurement | True-RMS 0.01 V to 600 V AC (15–400 Hz) / DC |
| Capacitance Measurement | 0.1 nF to 10.0 µF |
| Data Storage Capacity | > 1000 test results with test ID logging and recall |
| Live Circuit Test Inhibit | Selectable threshold: 25 V, 30 V, 50 V (default), 75 V, or 100 V |
| Safety Compliance | CAT IV 600 V / CAT III 1000 V (IEC 61010-1, EN 61557) |
| Ingress Protection | IP54 Weatherproof & Dust-Resistant |
| Power Supply | 6 × 1.5 V AA Alkaline (or 1.2 V NiMH cells) (~3000 tests) |
| Dimensions & Weight | 228 × 108 × 63 mm (9.0 × 4.25 × 2.5 in); Approx. 775 g |
| Included Accessories | SP5 Remote Switched Probe, Red/Black Silicone Test Leads with Probes & Clips, 6× AA Alkaline Batteries, Calibration Certificate, Hard Carry Case |
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