Ductor Testers

Ductor testers, also known as micro-ohmmeters or low resistance ohmmeters, are specialised instruments for testing electrical resistance in conductors, joints, and connections. By applying a controlled current and measuring the voltage drop, ductor testers accurately detect contact resistance, ensuring that systems operate efficiently and safely.

Why Ductor Testing is Essential

High resistance at joints or connections can cause overheating, inefficiency, or catastrophic equipment failure. Ductor testing provides precise, repeatable data to identify weak points before they lead to costly outages. It is a standard procedure in utilities, industrial facilities, and transport networks.

Applications

• Switchgear: Verifying low resistance contacts to prevent arcing.
• Transformers: Testing windings and ensuring safe current flow.
• Rail networks: Checking critical high-current connections.
• Industrial plants: Routine maintenance for motors and busbars.

Test Current Options

• 10A testers: Compact, portable ductors for everyday work.
• 200A and above: High current ductors for critical heavy-duty testing.

Professionals often associate ductor testers with the Megger DLRO series, but AEMC models such as the 6240, 6255, and 6292 provide excellent alternatives, offering accuracy, rugged construction, and value for money.

View our Micro-Ohmmeters main category to explore all available options, including 10A Micro-Ohmmeters and High Current Micro-Ohmmeters.