TH320 Universal Rockwell Hardness Tester is a multi-function hardness tester integrating Rockwell hardness tester, surface Rockwell hardness tester, and plastic Rockwell hardness tester. It adopts the Rockwell (ROCKWELL) measurement principle to directly perform Rockwell hardness measurement, surface Rockwell hardness measurement, plastic Rockwell hardness measurement, and convert Rockwell hardness value to HB, HV, HLD, HK, σb. It is suitable for hardness testing of carbon steel, alloy steel, cast iron, non-ferrous metals, and engineering plastics, and has the characteristics of high testing accuracy, wide measurement range, automatic loading and unloading of main test force, digital display of measurement results and automatic printing or communication with external computers.