Micro-Ohmmeters & Ductor Testers
Micro-Ohmmeters & Ductor Testers
Micro-ohmmeters, often called ductor testers or low resistance testers, are specialised instruments designed for measuring very small resistances with high accuracy. These devices are essential for identifying poor connections, verifying welded joints, and ensuring switchgear and busbar components maintain reliable contact resistance. With test currents ranging from 10A to 200A—and even models capable of delivering up to 1,000A—micro-ohmmeters are indispensable tools for engineers, contractors, and utilities across Australia.
Why Choose a Micro-Ohmmeter?
In high-current electrical systems, a small increase in resistance can result in overheating, wasted energy, and even catastrophic equipment failure. Standard resistance meters cannot achieve the accuracy required for such low values. Micro-ohmmeters overcome this by applying higher test currents, which ensures precise readings even in the micro-ohm range. This makes them far more accurate than standard milli-ohmmeters in critical applications.
Applications of Ductor Testers
- Switchgear and busbars: Verify contact resistance across joints and connections.
- Transformers and substations: Ensure integrity of high-current paths and prevent costly downtime.
- Generators and motors: Check windings and internal connections for deterioration.
- Welded joints: Confirm mechanical and electrical integrity in industrial environments.
- Rail and transport: Maintain safety and efficiency in rolling stock and infrastructure.
Popular AEMC Micro-Ohmmeters
We provide a complete range of AEMC micro-ohmmeters trusted by professionals worldwide:
- AEMC 6240: A highly portable 10A micro-ohmmeter that is extremely popular with contractors for everyday low resistance testing.
- AEMC 6255: An advanced 10A unit with extended features, widely used by utilities and industrial operators.
- AEMC 6292: A powerful 200A micro-ohmmeter designed for demanding high-voltage environments, providing exceptional accuracy for critical infrastructure.
Other Professional Options
For customers seeking cost-effective solutions, the SEW 9010UO offers a full 10A micro-ohmmeter at a lower price point while still delivering professional results. We also supply the latest MIKO range, specifically engineered for industrial applications in the high-end Australian market. These options provide flexibility depending on budget and project requirements.
10A vs High Current Micro-Ohmmeters
When selecting a micro-ohmmeter, it’s important to match the instrument to your application:
- 10A testers: Compact and portable, ideal for field service, contractors, and general maintenance.
- 200A+ testers: Heavy-duty units designed for utilities, power generation, and high-voltage scenarios where extreme accuracy and robustness are required.
Alternatives and Brand Comparisons
Globally, many engineers are familiar with the Megger DLRO series of ductor testers. While these are widely recognised, AEMC micro-ohmmeters provide proven, rugged alternatives for Australian conditions, supported with local expertise and service.
Explore More
To refine your choice, visit our related sub-categories:
Whether you need a portable 10A tester for everyday maintenance or a 200A unit for substation-level testing, our range of micro-ohmmeters and ductor testers delivers the accuracy and reliability required by Australian professionals.
