The magnetic switch means that it is induced by magnets. This “magnetic” is a magnet, and there are several types of magnets. The magnets commonly used in the market include rubber magnets, permanent magnet ferrites, sintered NdFeB, and so on. The switch is a reed switch. Reed switch is the abbreviation of dry reed switch. It is a kind of contactless passive electronic switch element. It has the advantages of simple structure, small volume and easy control. Its housing is generally a sealed glass tube. There are two iron elastic reeds, also filled with inert gas. At ordinary times, two reeds made of special material in the glass tube are separated. When there is a magnetic substance near the glass tube, the two reeds in the tube are magnetized and attracted to each other under the action of the magnetic force lines of the magnetic field, and the reeds are sucked together so that the circuit connected to the node is connected. After the external magnetic force disappears, the two reeds are separated due to their own elasticity and the circuit is disconnected. Therefore, as a line switching device controlled by a magnetic field signal, the reed switch can be used as a sensor for counting, limiting, etc. (in the security system, it is mainly used for making door magnets and window magnets). It is widely used in various communication devices. In practice, the permanent magnets are usually used to control the turning on or off of the two metal plates. Therefore, they are also called “magnetrons”.
The reed switch is also called a magnetron. It is similar to a Hall element, but its principle is different. It is a switching element controlled by a magnetic field signal. It can be used to detect the state of a circuit or a mechanical movement without a magnetic disconnect.
Another kind of magnetic switch is the proximity switch, door magnetic switch, also called induction switch in the market. It has a dry mold and is a standard-size plastic housing. The reed switch is sealed in the black housing and leads out. The other half of the plastic housing with the magnets is fixed to the other end. When the magnet is close to the switch with the conductor, a switch signal is issued! The general signal distance is 10mm connected. This product is widely used in security doors, home doors, printers, fax machines, telephones, and other electronic equipment.
There is also a kind of magnetic switch in a closed metal or plastic tube, one or more points of the reed switch, and then the tube is penetrated through one or more, hollow and the ring-shaped magnet inside the floating ball, and the use of fixed ring, The control float and the reed switch are in relevant positions so that the float floats up and down within a certain range. The magnet in the float ball is used to attract the contact of the reed switch to generate an on and off action.