Uni-T UT620C+ digital micro-ohmmeter

Uni-T UT620C+ is a precise digital micro-ohmmeter for measuring very low resistances over a wide range. It offers measurement from 0.001 mΩ to 300.0 kΩ, high resolution down to 1 μΩ, a four-wire method to minimize lead resistance influence, and memory for up to 500 results. Thanks to the backlit LCD, IP54 protection, and battery power, it is suitable for both workshop and field use.

The Uni-T UT620C+ digital micro-ohmmeter is designed for technical diagnostics and accurate verification of joints, conductors, connectors, windings, and metal components. It combines a wide measurement range with high accuracy, enabling it to detect even small resistance changes that may indicate a fault or deteriorating contact.

For stable and repeatable measurements it uses the four-wire (Kelvin) method, which eliminates the effect of test-lead resistance—crucial especially at micro-ohm values. The instrument works with a test current up to 1 A and a speed of approximately 2 readings per second, making it practical for service work and routine inspections.

Main advantages:

Wide range of resistance measurement: 0.001 mΩ to 300.0 kΩ
High resolution down to 1 μΩ and accuracy ±0.1% FS
Memory for up to 500 data sets for later analysis
Safer operation thanks to input protection up to 36 V AC/DC
Rugged design with IP54 protection rating
Backlit LCD for good readability
USB-C interface for communication with a computer (functions per manufacturer documentation)