Hardness tester is a special equipment used to measure the hardness of hull surface. Compared with mechanical hardness testing equipment, the product is easier to carry and measurement is more convenient. At the same time, it can measure the hardness of various materials. The product can wirelessly transmit data to the background for real-time data analysis. The new generation of digital hardness tester eliminates the boring procedures of manual reading of mechanical hardness tester in the past, and realizes the real sense of intelligence and portability.