Wiring terminal is a kind of accessory product used to realize electrical connection, which is divided into the category of connector in industry. With the increasing degree of industrial automation and the increasingly strict and accurate requirements of industrial control, the consumption of wiring terminals is gradually increasing. With the development of the electronic industry, more and more terminals are used, and there are more and more types. In addition to PCB board terminals, there are hardware terminals, nut terminals, spring terminals and so on.Wiring terminals are gradually widely used in various fields and play a connecting role in transmitting electrical signals and conducting electricity, which reduces the consumption of workload and production cost, brings a lot of convenience to production and use, and avoids a lot of trouble. So as to simplify the product structure and save the manufacturing cost. Therefore, according to the benefits of terminal detection and combined with market analysis, it is recommended that the instruments suitable for terminal detection can be tested by professional testing equipment. Commonly used terminal detection equipment include: tool microscope and optical imager.