100VDC Oberflächenhalterung verdrahtet NC/KEINE Tür Fenster Sensor Magnetschilf Schalter Zum Selbermachen
ab 3,81 €
There are two types of reed switches: "normally open" reed switches and "normally closed" reed switches. A normally closed reed switch is closed when not near a magnet; when a magnet approaches it, the normally closed switch will open.
Jetzt bei Ebay: