UCI Hardness Tester use ultrasonic contact impedance method of measuring hardness standardized according to ASTM A1038 .
The method allows making measurement very fast and easy; install the probe, load the spring for indentation the indenter with necessary load, read the hardness value on the device's display 

Ultrasonic Contact Impedance ( UCI ) is used for measurement of hardness of small products , object with a thin wall, complex shape with thickness from 1 mm and weight over 0.1 kg for measuring the hardness of hardened layer's surface.

There are available UCI probes with different loads, 10N, 50N, 98N for hadrness testing of different surface finish products.