China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Magnetron switch is a switching device controlled by the magnetic changes of a magnet. It is widely used in our homes, industrial automation, and electronic devices. For magnetron switches, the magnet is one of the core components that triggers the switch. So, is its size arbitrary?
Answer: No, the magnetic field strength and distribution of the magnet directly determine whether the switch can work properly.
Magnetic Switch Bar Block Ferrite Magnets
Many Hall sensors have a sensitivity to magnetic fields in the range of 50 to 200 gauss (or higher), and if the magnet is too small or insufficiently magnetic, it may not be able to provide enough magnetic field strength to trigger the switch properly.
The size of the magnet determines the range of the magnetic field; a larger magnet can trigger the switch at a greater distance, while a smaller magnet needs to be closer to the switch in order to generate a sufficient magnetic field. If the actual use scenario requires a certain triggering distance, you need to choose a large enough magnet.
If the magnet is too large, the magnetic field will be too strong, which may lead to false triggering. In some precision equipment, it is necessary to control the magnetic field not to exceed the preset working range of the switch, otherwise it may lead to unstable switch action.
At present, the magnet material used is mainly neodymium and ferrite, and the shape is mainly bar, round, cylindrical, for example, in the intelligent doors and windows, the magnetic control switch is usually installed on the door frame, and the magnet is installed on the door sash. Since the gaps in doors and windows are usually between a few millimeters and a few centimeters, small NdFeB magnets are usually chosen to ensure that the magnetic field is strong enough but not excessive. Magnetic switches are used in some water meters to record changes in water flow. In this scenario, magnets need to work for a long time and in close proximity, so low-cost ferrite magnets are mostly used.
Therefore, the magnets used in magnetic switches are not random in size. When choosing magnets, you need to consider factors such as size, material, shape and magnetic field strength, etc. If you are not sure, you can refer to the technical parameters of magnetic switches or optimize your choice through actual testing.
Related magnetic switch magnets;
Reed switch magnet orientation