ADVANCE AUTOMATION COMPANY LS-10L-NO REED SWITCH
ADVANCE AUTOMATION COMPANY 24VAC/DC 120VAC 1/2A 085A INDUSTRIAL CONTROL EQPT FOR HAZARDOUS LOCATIONS CLASS I.GRPS.A.B.C.D.DIV. 2 LISTED CLASS II.GRPS. F.G.DIV. 2 83G4 CLASS III.DIV. 2
A reed switch is an electromagnetic switch that controls the flow of electricity in a circuit by using magnetism Reed switches are made of two or more ferromagnetic metal wires or blades, called reeds, that are placed in a glass tube and slightly separated from each other. When a magnetic field is applied, the reeds become magnetized and are attracted to each other, closing the contact and allowing electricity to flow through the circuit. When the reeds are separated, the circuit is open and electricity cannot flow.
Reed switches are often used in mechanical systems as proximity sensors. Some examples include:
- Door and window sensors: Used in burglar alarm systems and tamperproofing
- Laptops: Used to put the laptop into sleep or hibernation mode when the lid is closed
- Bicycle wheel speed sensors: Used to briefly actuate each time a magnet on the wheel passes the sensor
- Computer terminal keyboards: Used in older keyboards where each key had a magnet and a reed switch that was activated when the key was depressed
- Medical devices: Used in tiny probes that are swallowed by patients, where a doctor can activate the probe with a magnet outside the body
Reed switches have several advantages, including:
- No power required: They don’t need an external power source to operate
- Reliable: They can withstand millions of operation cycles
- Contaminant free: They are hermetically sealed and have leak proof contact switching
- Fast operation: They can switch rapidly with very little bounce
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