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 ...

Thermal reed switches consist of a pair of contacts on ferrous metal reeds which are hermetically sealed. They are actuated by a magnetic field. The contacts may be normally open or normally closed ...