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Limit switches and reed switches for use in vacuum
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GasperSB:
Hello everyone!

I'm designing a test setup based on requirements from our physics department. The major part of the test setup is a linear rail with a slide. In order to safely perform required tests I need to add a limit switch at each end of the rail. Tests are going to be performed inside a vacuum chamber.

I'm interested if anyone here knows any suppliers or manufacturers that provide limit or reed switches for vacuum environment. Preferably in small form factor.

Best regards,
Gasper

EDIT: Vacuum level: ~ 10^-7 Pa (10^-9 Torr)
Kleinstein:
The glass encapsulated reed contacts should be no problem with vacuum. For other type is depends on the vacuum grade - down to some mPa should be OK with most types, better vacuum could be tricky, especially if a bake out is used.

Beside reed switches hall sensors could be an option too, as they can be smaller. It just need the power part outside.
RoGeorge:
If the vacuum chamber is just a glass bell, or of it has a visiting window, maybe an optical switch can be put in place, where both the emitter and the receiver of the light ray(s) can stay outside.
richard.cs:
Is the vacuum sufficiently good that you need to worry about out-gassing from components? Operating in vacuum is quite different from not messing up an experiment that requires a very high vacuum.
grifftech:
to simplify: how strong is the suck
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