![A giant reed switch. [4032x3024 - 1.84MB]](https://pic8.co/sh/j48ZGT.jpg){kind=link}
no energizing coil. moving it near or away from a magnet or magnetic field causes it to open or close. Some will have their own energizing coil built in but not all.
no energizing coil. moving it near or away from a magnet or magnetic field causes it to open or close. Some will have their own energizing coil built in but not all.
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