How do magnetic switches work?

• As the name implies, a magnetic switch is a switch that is induced by a magnet.

Magnet, refers to the market commonly used rubber magnets, ferrite magnets, ndfeb magnets.The switch is a reed tube.Dry reed tube is the abbreviation of dry reed tube, it is a kind of passive electronic switch element with contacts, it has the advantages of simple structure, small volume, easy to control and so on.The shell is a sealed glass tube with two elastic reeds of stickers inside.There is also an inert gas filled with the metal rhodium.

Usually, the two reeds made of special materials in the glass tube are separated.When a magnetic substance is close to the glass tube, under the action of magnetic field magnetic force line, the two storage pieces inside the tube are magnetized and attract each other to contact, and the storage pieces will be sucked together to make the circuit connected by the junction ".After the external magnetic force disappeared, the two plates were separated due to their own elasticity, and the circuit was broken.Therefore, as a circuit switch device controlled by magnetic field signal, reed tube can be used as a sensor, for counting, limit, etc. (in the security system is mainly used for the manufacture of door magnetic, window magnetic), but also widely used in a variety of communication equipment.In practice, a permanent magnet is used to control whether the two pieces of metal are connected or not, so it is also called a magnetron.

Another kind of magnetic switch is to set a point or more reed switch in a closed metal or plastic tube, and then put the tube through one or more hollow float balls with ring magnet inside, and use the fixed ring to control the float ball and the magnetic fence switch in the relevant position, so that the float ball can float up and down within a certain range.The magnet in the float ball is used to attract the contacts of the reed switch and generate the open and close motions.

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