1、 The mechanical processing and manufacturing industry mainly focuses on metal processing and manufacturing. The roughness meter was originally developed to detect the surface roughness of machined parts. Especially the stylus roughness measuring instrument is more suitable for detecting metal surfaces with relatively hard textures. For example, automotive parts processing and manufacturing industry, mechanical parts processing and manufacturing industry, etc. As long as these manufacturing industries involve the surface quality of workpieces, the application of roughness meters for detection is *.

2、 With the advancement and development of technology, more and more new materials are being applied to non-metallic processing and manufacturing industries, such as ceramics, plastics, polyethylene, and so on. Some bearings are now made from special ceramic materials, and pumps and valves are made from polyethylene materials. These materials have a hard texture and can be used as a substitute for metal materials to make workpieces in some applications. Their surface roughness also needs to be tested during the production and processing process.

3、 With the continuous strengthening and improvement of the technology and functions of roughness meters, as well as their deep promotion and application, more and more industries have been found to require roughness detection. In addition to mechanical processing and manufacturing, roughness evaluation is also required in the production and processing of power, communication, electronics, such as couplings on switches, integrated circuit semiconductors, etc. Even stationery, tableware, and human teeth surfaces used in people's daily lives require surface roughness inspection.