REED SWITCH

The reed switch is a sealed magnetically controlled contact. The reed relay uses one or more reed switches as switching contacts. They are a glass bottle that is filled with gas or the cylinder is evacuated. In the balloon there is a pair of contacts that close or open under the influence of a magnetic field. These contacts are called contact cores, because they flow through a magnetic flux, which ultimately creates an electromagnetic force. Under the action of this force, the contacts are attracted, overcoming the elastic forces of the contact material.
There are also special reed switches, which include gezakona and gersikona. Gezakon is a memorizing contact. Gerskon is a power contact. It is designed for switching large currents.
Widely distributed reed switches are found in simple alarm systems, various sensors that react to a magnetic field, and of course in reed relays. The latter have several advantages over electromagnetic relays. Here, first of all, high reliability and speed of switching. Since the contacts of reed switches are hermetically sealed, they can be used in conditions of high moisture, gas contamination and dustiness. Disadvantages of reed switches are their fragility and subject to external magnetic fields, i.e., under conditions of strong magnetic fields, the reed switches can spontaneously close or open. In addition, they are not able to commute large currents. Despite this, in view of its simplicity of design, the reed switch has been used successfully in various electronic devices.
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