[See Appearance] Most of the good switches are made of high-grade materials such as bulletproof rubber. The fireproof performance, moisture resistance, and impact resistance are all high. The surface is smooth. You should consider the feel of your own touch when you purchase. Switch the material and ask the dealer. In general, the surface is not very smooth and has a thin, brittle feel. The performance is unreliable. The panels of a good proximity switch socket require no bubbles, scratches, or smudges. The touch of the switch is light but not tight, and the socket of the socket needs to be equipped with a protective door. The plug must be plugged and unplugged to a certain degree of force and cannot be inserted on one foot. [掂 component] When purchasing a proximity switch, you should also weigh the components of a single switch. Because only the copper in the switch is thick, the weight of a single switch will be heavy, and the copper inside is the most critical part of the switch. If it is alloyed or thin, the copper will not have the same weight and quality. ã€Select Brand】 It is best to use well-known brands. Because the quality of the switch is related to the normal use of electrical appliances, and even the convenience of living. Proximity switches produced by many small manufacturers sometimes have very unreliable outlets, and it may not take long for them to be replaced. It is obviously very troublesome to replace them frequently; however, most well-known brands will make effective commitments to consumers, such as "guaranteeing 12 years of service life. "," can be continuously switched 10000 times" and so on. [Marked] Pay attention to the marks on the base of proximity switches and sockets: such as national compulsory product certification (CCC), rated current and voltage value, product model, date, and so on. [Whole package] The product package is complete, there should be a clear manufacturer's address phone above, with instructions and certificate. [To see the protection door] Use a screwdriver or small key to smash one side of the two holes and one hole below the three holes. With a bit of strength, it's unilaterally protecting the door. It's no. This socket is obviously not safe enough. [See copper materials] If you see it is bright yellow through the jack, then give it up. Brass easily rusts, and its texture is soft, and its conductive properties deteriorate as time passes. If the color of copper is purple, it is better. Copper is tough and does not easily rust. It is not enough to look at it directly, but generally you must open it up. Many sockets are jacks. Copper is used here, and brass is used inside. It is also easy to rust. Even if you use copper, you have high points. Most brands of copper pieces are several pieces of splicing, with rivets interface, so that the interface will also heat, affecting the conductivity. Compared with the current technology, the current brand will use the entire piece of copper as the copper part inside, so that the conductive performance is greatly improved. [Look at the power] Now that the power of household appliances is getting larger and larger, the load requirements on the switches are also higher, especially in the moment when the appliances are powered on (many poor quality switches are burned when the electricity is energized). A good switch should be able to pass more than 16A of current, while normal can only pass 10A at most. Experience switch socket buy furniture brand switch socket electrical Stainless Steel Pipe Fitting, Brass Pipe Fitting, Elbow Pipe Fitting, Water Pipe Fitting ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsir-valves.com