The UCI method is a sophisticated hardness testing technique that uses a diamond-tipped rod vibrating at ultrasonic frequencies to measure material resistance. Unlike traditional rebound testers, UCI measures the shift in frequency when the diamond indenter is pressed into a surface, making it the ideal solution for testing thin-walled components, heat-affected zones (HAZ) of welds, and surface-hardened parts. This category features high-precision UCI Probes and Digital Display Units that provide laboratory-grade accuracy in a portable format. Because it requires very low indentation force, UCI is perfect for delicate or finished surfaces where minimal marking is essential, offering a fast and non-destructive way to verify material properties on-site.