![A giant reed switch. [4032x3024 - 1.84MB]](https://pic8.co/sh/j48ZGT.jpg){kind=link}
Where's the energizing coil?
Where's the energizing coil?
It would only need a coil if it is part of a reed relay. Large reed switches like this could be used for proximity detection of a permanent magnet as part of a machine or mechanism. Smaller ones are used with permanent magnets to make old school door/window open sensors where the magnet is mounted on the door/window and the reed switch on the fixed trim so that the magnet will cause the circuit to be closed when in the door closed state and break when the door opens. Not commonly used these days since we have better means of sensing break-ins now.
It would only need a coil if it is part of a reed relay. Large reed switches like this could be used for proximity detection of a permanent magnet as part of a machine or mechanism. Smaller ones are used with permanent magnets to make old school door/window open sensors where the magnet is mounted on the door/window and the reed switch on the fixed trim so that the magnet will cause the circuit to be closed when in the door closed state and break when the door opens. Not commonly used these days since we have better means of sensing break-ins now.
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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