Milli-Ohmmeters

Milli-ohmmeters are precision instruments designed to measure low resistances in the milliohm and micro-ohm range. They are often grouped with micro-ohmmeters and ductor testers, all of which perform low resistance testing for critical electrical systems. These testers are essential tools for ensuring that connections, joints, and conductors operate efficiently and safely.

Why Measure in Milliohms?

In high-current circuits, very small resistances can have a large impact. Measuring down to the milliohm level allows engineers and technicians to detect issues such as loose connections, contamination, or deterioration that could cause failures. Preventive testing with a milli-ohmmeter helps extend the life of equipment and avoid unexpected breakdowns.

Applications

• Motors and generators: Verifying winding and connection integrity.
• Switchgear and busbars: Checking for low resistance across contacts and joints.
• Industrial maintenance: Preventive testing across high-current equipment.
• Utilities: Substation and transformer connection verification.

Types of Milli-Ohmmeters

• 10A portable testers: Compact, easy-to-use field instruments.
• High current units (200A and above): Advanced models for utilities and large-scale industrial applications.

Brands & Professional Options

Professionals often know Megger DLRO ductor testers as industry standards. However, AEMC milli-ohmmeters such as the 6240, 6255, and the 6292 offer excellent alternatives, delivering precision and rugged reliability with support in Australia.

See our main Micro-Ohmmeters category to compare milli-ohmmeters, ductor testers, and high-current models suited to your needs.