Megger S1/MIT Insulation Testers – Essentials, Advanced, Expert

Find the right insulation tester for your job. Compare Essentials, Advanced, and Expert models in the S1/MIT range — accuracy, safety, and reliability.

Find the Right Insulation Tester for Your Job

Essentials, Advanced, or Expert — discover the model that fits your testing needs.


The Mark 2 range builds on what technicians already trust — now faster, clearer, and even more reliable where it matters. With improved noise rejection, smarter test workflows, and features like PI Predictor™ and Re>Act Mode that save time without sacrificing confidence, these insulation testers are engineered for real-world conditions. And because no two jobs are the same, the S1/MIT range is available in three clear tiers. Whether you’re carrying out routine checks, managing complex diagnostics across industrial sites, or working in high-noise substations, you’ll find the model that fits your environment and the standards you need to meet — without compromise. 
 

Why the S1 and MIT Mark 2 Range 

  • Safe – Built for Low Voltage through EHV environments. 
  • Fast – PI Predictor™ and Re>Act Mode reduce downtime. 
  • Reliable – Trusted by frontline technicians and high-voltage specialists worldwide. 

Range Overview

Essentials

For routine checks and straightforward testing 

  • Models: MIT515/2, MIT1015 
  • Best for: frontline technicians, go/no-go testing 
  • Features: IR, DAR, PI; Re>Act Mode; PI Predictor™ 
  • Affordable, portable, reliable 

Explore Essentials

Advanced

For more complex diagnostics and data management 

  • Models: MIT525/2, MIT1025/2, MIT1525/2 
  • Best for: utilities, industrial teams 
  • Features: DD, SV, Ramp, PDC (via software); internal data storage; Bluetooth + app connectivity 
  • Faster workflows, wider test options

Explore Advanced

Expert

For harsh substations and extreme accuracy 

  • Models: S1-568/2, S1-1068/2, S1-1568/2 
  • Best for: noisy substations, high-voltage specialists, OEMs, labs 
  • Features: Remote operation, superior noise rejection up to 1,000 kV environments 
  • Ultimate precision and reliability 

Explore Expert

At-a-Glance Comparison

If you're not sure which model is right for you, here's how they compare:

 

Essentials 

Advanced 

Expert 

Typical Use 

Routine checks 

Diagnostics & storage 

Harsh substations 

Max Voltage 

5–10 kV 

5–15 kV 

5–15 kV 

Data Storage 

❌ 

✔️ 

✔️ 

Connectivity 

❌ 

✔️ Bluetooth 

✔️ USB remote 

Best For 

Frontline technicians 

Utilities & industry 

HV/EHV specialists 

Download full comparison guide

Every test has to be done. With Megger, every test gets done right. 

Whether you choose Essentials, Advanced, or Expert, you get Megger accuracy, reliability, and support.