Portable Micro-Ohmmeter – High Precision Contact Resistance Tester (0.1 Class)

This portable micro-ohmmeter is engineered for precise measurement of low resistance values in electrical contacts and conductive joints. Using the four-wire (Kelvin) test method, it eliminates lead resistance influence to ensure accurate and repeatable micro-ohm measurements.

With a minimum resolution of 0.01µΩ and 0.1 accuracy class, the instrument is suitable for detecting:

• Loose or degraded contacts

• Oxidised or contaminated joints

• Busbar connection faults

• Circuit breaker contact wear

• Grounding and bonding integrity issues

Designed for field use, the unit includes a large-capacity lithium battery with charging capability, enabling portable operation during commissioning and maintenance activities.

The digital display provides clear readings, while internal memory supports storage of up to 999 test groups with convenient data lookup functionality for reporting and trend analysis.

Its compact, rugged design supports deployment in substations, industrial facilities, and utility environments.

Key Features

• High precision contact resistance measurement

• Four-wire (Kelvin) testing method

• Minimum resolution: 0.01µΩ

• Accuracy class: 0.1

• Data storage: 999 groups

• Data lookup function

• Rechargeable lithium battery

• CE & RoHS certified

• Portable field-ready design

Applications

• Switchgear commissioning

• Circuit breaker contact testing

• Busbar and joint resistance measurement

• Grounding system verification

• Substation preventive maintenance

• Industrial electrical inspections