> I'm designing a tool length measurement device for a mill.
> I've settled on the mechanical design which is a tripod arrangement, but
> what I'm after is some contacts to actually make and break the connections.
> I know such beasts exist but I'm having difficulty finding sources for them.
>
> At the moment its looking like I'll have to settle with gold plated PCB
> as the contact material.
>
> I'm looking for gold at the moment because I want to run the contacts at
> a very low current/voltage to minimise arcing.

Would pogo pins work for you? They are gold plated, spring loaded and
come in a variety of point styles. These are usually used for in
circuit programming and testing during manufacture.

http://www.idinet.com/_FileLibrary/PDF/pg42.pdf
http://mouser.com/ProductDetail/IDI/SX-0-ES-37-G/?qs=sGAEpiMZZMuSFBMFeRq2EWmzThOn%252bbiO
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