The reed switch in a magnetic switch, also known as a magnetron, is a switching component that uses magnetic field signals for control. When there is no magnetism, the circuit is disconnected, and it can be used to detect mechanical movement or the state of the circuit. When the magnetic switch is not in operation, the two reeds in the glass tube do not come into contact. When magnetic substances approach the glass tube, under the influence of the magnetic field, the two reeds will be magnetized and attract each other, thus connecting the circuit. When the magnetic substance disappears and there is no influence of external magnetic force, the two reeds will separate again due to their own elasticity, breaking the circuit.

2. There is a type of magnetic switch that sets multiple or one reed switch points inside a sealed plastic tube or metal container. The entire container is hollow, and a float ball with a ring-shaped magnet is installed inside. The reed switch and the float ball are controlled at relevant positions by a fixed ring, and the float ball can float within a certain range. The on and off actions of the switch are generated by the magnet inside the float ball attracting the contacts of the reed switch.

3. Another type of magnetic switch is the commonly known proximity switch, also called door magnetic switch or induction switch. It has a standard-sized plastic casing with the reed switch encapsulated inside the black casing. The wire is led out, and the other half of the plastic casing with a magnet is fixed at the other end. When a magnetic substance approaches the switch with the wire at a distance of about 10mm, the switch will send out a switch signal.