20pcs Reed Switch Reed Contact Normally Open (N/O) Magnetic Induction Switch (2mm*14mm)

They just work. Comes in a nice sturdy plastic case. With a decently strong neodymium magnet they’ll activate from about an inch away. I had no problem integrating them into 3D printed designs.

Working flawlessly. Much better and more durable than the glass version.

I bought a pack of these a few years back and they were 100% reliable. Then I bought some different ones that looked the same but they were flaky so when I needed some more I went back to these. So far so good.

They seem to work fairly well, only occasionally getting stuck closed. Be careful to handle gently or the glass can break. Next time I'll try plastic housing versions.

A+++

These switches are tiny. They are made out of plastic instead of glass. My wife stepped on them and they were just fine. They are thin and can be used in very small spaces and very discretely. The are build tough and will handle a lot of abuse. Good way to mount them would be to glue them in place. I made a little grove and used tape to keep them in place. Since you get 10 switches, the value is a good value. Opposite from the switch I placed a magnet to activate the switch. They work well

They do exactly what they're supposed to do! Just make sure to not try to run more than the rated 0.5A through them, or the contacts will fuse.

The glass ones were unusable. These immediately worked for my application. I didn't have to replace the magnet in the submersible device.