Micro ohm meter is a digital instrument for measuring micro resistance. Its basic principle is that it is measured by the four-wire method of Kelvin principle. Its advantage is that the measured data are close to the real resistance value of the resistance in the working state, and the influence of the resistance of the test line itself is eliminated. Therefore, when measuring micro-resistance, Micro Ohm Meter is more responsive to the real resistance. UNI-T Micro Ohm Meter has the advantages of simple operation, time saving, digital display, easy for operators and so on.