Importance of Choosing a Reed Switch Over Other Methods of Providing Switches.
Security is the major function of a reed switch It depends on magnetic field for operation. It has two ferromagnetic metals which are flexibleThey flexible metal contacts are in a hermetically sealed glass envelop. They are dependent on magnets They are used in mechanical system to act as proximity sensors. Windows and door alarms and also tamper-proofing need these switchesThey are also used in laptops to enable off going of the computer when the computer lid is lowered. Electric flow in a circuit is provided by it Introduction of a magnetic field cause separation or moving together of the ferromagnetic switchesThese switches do not require any power to work. Presence of a magnet field is important for working of the switchThey are controlled by invisible magnetic fields.There are different types of reed switches. Normally closed and normally open switches are the main types.In the normally open switch, the two ferric reeds are designed in a way that they are not in contact. When a magnetic field is present, the reeds come together closing the switch.A normally closed reed switch will remain in contact with each other. The switch is open when there is a field Another type has three points It moves from one contact to another when a magnetic field is introduced. The initial contact is restored by the withdrawal of the field
Its working is totally depended on the field.The magnet to be used will depend on the size and structure of the reed switch. It also considers the distance of separation between itself and the magnetA large separation will require a stronger magnet. Permanent magnets are of less consideration compared to the flexible ones Neodymium and ferrite magnets are commonly used. Neodymium is the strongest magnetThe ferrite ones are chosen due to the deep production of magnetic field.
The switch is more important is advantageous. They do not require power to function.It is also beneficial because there is no mechanical wearing and damage as there are no physical application of stress on the switch.They are also advantageous as they can work at secret places due to their high sensitivity.They are also covered with glass tubes providing a protection against atmospheric corroding.They are more compact as compared to the other mechanical switches.
It is cheaper to maintain a reed switch as compared to the other mechanical switching The regular repairs are not needed since there is no mechanical wearing and tearing of the reed switch Power payments are not required as the switch is independent of power The private use makes it more secure.