So funktioniert der Reed Schalter im Öffnungsmelder

2017-08-09T15:16:35+00:00 Kategorien: Reedschaltung, Technisches Hintergrundwissen|Tags: , |

Öffnungsmelder arbeiten mit einem sogenannten Reed-Kontakt. Dabei handelt es sich um zwei in ein Glasröhrchen eingeschlossene sich leicht überlappende Kontaktplättchen und einen Magneten. Im Ausgangszustand befindet sich das Glasröhrchen nahe dem Magneten. Sein Magnetfeld bewirkt ein Zusammenhalten der zwei Kontaktplättchen. Wird der Magnet nun vom Glasröhrchen entfernt, so wird mit zunehmender Entfernung das Magnetfeld schwächer bis es schließlich nicht mehr ausreicht [...]

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