Proximity & Reed Switch Assembly

An "assembly" is set of manufactured parts or components that work together in unison as one mechanism or device. Proximity switches or sensors measure "closeness" to a targeted object and open or close an electrical circuit when they make contact with or come within a certain distance of an object. There are four basic types of proximity switches: infrared, acoustic, capacitive, and inductive. The reed switch is an electrical switch operated by an applied magnetic field. It was invented at Bell Telephone Laboratories in 1936. In its simplest and most common form, it consists of a pair of ferromagnetic flexible metal contacts in a hermetically sealed glass envelope. The contacts are usually normally open, closing when a magnetic field is present, or they may be normally closed and will open when a magnetic field is applied. The switch may be actuated by an electromagnetic coil, making a reed relay, or by bringing a permanent magnet near it. When the magnetic field is removed, the contacts in the reed switch return to their original position. In electrical engineering, a switch is an electrical component that can disconnect or connect the conducting path in an electrical circuit, interrupting the electric current or diverting it from one conductor to another. The most common type of switch is an electro-mechanical device consisting of one or more sets of movable electrical contacts connected to external circuits. When a pair of contacts is touching, current can pass between them, while when the contacts are separated no current can flow.

• Proximity & Reed Switch Assembly
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