Which Insulation Tester Is Right for You?
You’re working against deadlines, with tight teams and unpredictable weather. And somewhere in the middle of all that, you’re expected to choose the right insulation tester — not just for today’s job, but for the long haul.
That’s why we rebuilt the MIT and S1 series as the new Mark 2 range: to make it easier to choose the tester that fits how you actually work.
All three performance levels — Essential, Advanced, and Expert — include the same core features, including PI Predictor™ and Re>Act Mode. However, what surrounds those features varies depending on your site, workload, and reporting needs.
All the Same Core — Different Performance Levels
That’s why every model in the MIT and S1 Mark 2 range includes two exclusive features — both patent applied:
- PI Predictor™ — early estimates to speed up decisions
- Re>Act Mode — safe retesting in as that allows you to monitor discharge little as 10 minutes
However, when it comes to memory, filtering, and test options, each level builds upon the specification to match different needs.
Find Your Fit — Based on How You Work
🟦 Essential – Straightforward Testing, No Extras
- Models: MIT515/2 / MIT1015
- Reliable results for routine IR, DAR, and PI tests
- No storage or remote features
- Ideal for frontline technicians or basic maintenance checks
🟨 Advanced – Smarter Diagnostics, Faster Reporting
- Models: MIT525/2, MIT1025/2, MIT1525/2
- Bluetooth with Mobile App support, export options, and advanced test modes (DD, SV, Ramp)
- Enhanced noise immunity
- Designed for users who need quick reporting and deeper insight
🟥 Expert – Built for Substations and Harsh Sites
- Models: S1-568/2, S1-1068/2, S1-1568/2
- Best noise filtering (up to 8 mA), full remote operation, and extended memory
- Ideal for extreme noisy environments and complex testing demands
Still deciding? See the full specs, features, and accessories.
View the full MIT and S1 Mark 2 range
What Matters Most in Your Workflow?
Not every job needs the top-tier model. And not every technician wants extra features they won’t use. That’s why the MIT and S1 Mark 2 range is structured to match different roles, not just different budgets.
Even better, every unit shares the same logic and interface, so teams can train once and test confidently across multiple models.
Want the full comparison at a glance? Download our quick reference guide below.
