Hardness measurements is commonly used like Brinell, Rockwell, Vickers, Leeb, etc. Rockwell and Brinell with heavy loading force and big indentation, lead to serious destruction on the sample surface. Vickers apply optical measurement, but only professional technicians can operate smoothly, impossible to measure the hardness of heavy work pieces, installed machinery, and permanently assembled parts. Leeb hardness tester applies rebound and indirect methods to measure hardness, easily leading to big deviations when convert to Brinell, Rockwell, and Vickers scales.Ultrasonic hardness tester UHT-900 applies the ultrasonic contact impedance method to do comparative hardness measurement for testing pieces, with advantages of high accuracy, efficiency, portability and easy operation.Ultrasonic hardness tester UHT-900 is widely used to measure the hardness of small forgings, cast material, weld inspection, heat affected zone, Ion-nitride stamping dies and molds, forms, presses, thin-walled parts, bearings, tooth flanks, etc.

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