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The reed switch is an electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin Kovalenkov at the Petrograd Electrotechnical University , [1] and later evolved at Bell Telephone Laboratories in 1936 by Walter B. Ellwood into the reed relay.
What is a Reed Switch? A reed switch is an electromechanical switching device. The overall structure is simple. Two ferromagnetic blades that are hermetically sealed in a glass envelope. In other words, these components can exist or be used in almost any environment.
Nov 27, 2021 · Reed switches come in two main varieties called normally open (normally switched off) and normally closed (normally switched on). The key to understanding how they work is to realize that they don't just work as an electrical bridge but as a magnetic one as well: magnetism flows through them as well as electricity.
Aug 14, 2018 · How does a reed switch work? The switching mechanism is comprised of two ferromagnetic blades, separated by only a few microns. When a magnet approaches these blades, the two blades pull toward one another. Once touching, the blades close the normally open (NO) contacts, allowing electricity to flow.
- Arrow Electronics
Introduction. Reed switches are magnetically-actuated electrical switches (not magically-actuated, though it seems that way sometimes). When the body of the switch is exposed to a magnetic field -- like a magnet or even a strong electrical current -- two ferrous materials inside pull together, the connection closes, and current can flow.
Oct 26, 2023 · Explore the workings of reed switches, their types, advantages, applications across industries, limitations, and importance in modern technology. Understanding Reed Switches. A reed switch is an electrical switch that is operated by an applied magnetic field. Designed by Bell Telephone Laboratories in 1936, this unique device plays an integral ...
Feb 1, 2023 · Reed switches are a special kind of electrical switch, actuated (turned on and off or change over) by magnetism. The most common type features two thin, flexible, ferromagnetic metal wires or blades - the reeds - positioned slightly apart in a hermetically sealed glass bubble.
