When the magnet is removed, the flexible reeds spring apart and re-open the circuit. The reed switch was patented in 1941 by Walter B. Ellwood, a Bell Labs engineer. Ellwood was looking to design ...

[Lucid Science] shows us how to make some simple reed switches. Reed switches are simple components that detect a magnetic field and can close or open a circuit once detected. While not really a ...

based on magnetic field applied. Examples include, smart meters, shelf labels, reed switch replacement, smart home etc. Please refer to NMH1000 Magnetic Switch Sensor Datasheet for more information.

II. If the Closed door Attached with Magnetic reed Switch is openedforcibly without owners’ knowledge a telegram call is made to alert the owner of the house immediately to take police action on such ...