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Home / Products / HARE Series – 100/200/300A digital micro-ohmmeter
HARE-series 100/200/300A micro-ohmmeter
The HARE series is a micro-ohmmeter manufactured using advanced engineering technologies that can apply up to 100A/ 200A/ 300A test current. With its easy-to-use software, the HARE series can easily measure the contact resistance of circuit breakers, shunt and disconnectors by applying an adjustable test current of up to 100A/ 200A/ 300A, depending on the model.
The HARE Series lets you measure low resistances in switches, disconnectors and shunts quickly and reliably. Depending on the model, you apply a test current of up to 100 A / 200 A / 300 A for a stable measurement with high resolution. The measuring range of 0.1 µΩ to 5 Ω, the 4.3″ colour touch screen and internal storage (≈ 1000 records) make the HARE the practical workhorse for field and workshop.
Key benefits
- High test currents – up to 100 A / 200 A / 300 A (model dependent) for reliable contact resistance measurements
- Wide measuring range – 0.1 µΩ to 5 Ω with high resolution for contact points and shunts
- Quickly ready – user-friendly interface, all results clearly displayed on one screen
- Smart data handling – internal storage (≈ 1000 measurements) and USB export for reporting
- Field-capable – compact, robust, designed for fast on-site diagnosis
Applications
- Circuit breakers –Check static contact resistance of main contacts
- Disconnectors & separators – verify very low resistance connections
- Shunts – main and measurement shunts measured through at high currents
Why choose the HARE Series?
- You get stable measurements at high test current: it breaks through oxide layers on the contacts and gives a reproducible value
- You work quickly and flawlessly thanks to the clear touchscreen and easy workflow
- You document instantly with internal storage and easy USB export for reporting or quality records
Which HARE variant do I need: 100 A, 200 A or 300 A?
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For standard contact measurements, 100 A is often sufficient. Choose 200 A or 300 A for heavy power switches, thicker conductors or when you want maximum penetration and low-Ω stability.
Does the HARE also measure dynamic resistance?
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No. The HARE only measures static contact resistance; HighTest supplies it as a static contact resistance tester. For a dynamic resistance measurement, use the ARES-200D or a breaker analyser with a DRM function.
Answers to your questions on micro-ohm measurements
What is a micro-ohmmeter?
How does the 4-wire (Kelvin) method work?
What do you use a micro-ohmmeter for?
Which measurement ranges and resolutions are common?
Why is test current important?
Is more testcurrent always better?
What does ‘accuracy’ mean in micro-ohmmeters?
What is temperature correction?
Can I measure inductive loads (motor/trafo)?
What are common measurement errors?
How do you interpret contact resistance?
How does a micro-ohmmeter compare to a winding-resistance tester?
Gijsbert from IONIO will be happy to help.
At IONIO, we not only supply advanced testing and measurement systems, but also offer clear and expert advice to optimise the testing of your product. Find out how we can improve your business processes. A consultation can be scheduled in no time!
