Magnetic float is one of the core components of level sensor switches. The float is the welded part through a fixed size injection molded or punched stainless steel plasma and is embedded with magnetic system, and a liquid level control component that is simple and easy to use. It is not complicated in circuit and will not be disturbed; and as long as the material selection is correct, the liquid, pressure and temperature of whatever nature can be used. Its quality determines the reliability and the service life of the level sensor switch.