On 3 Dec 2005 21:42:08 -0800, "bschwand"
wrote:

Thank you for setting me in the right direction. It would not be high
vacuum, probably at most 0.1 atmosphere. The spark plug idea is
brilliant, I'll try that and see if it works. I'll do some googling
about vacuum and feedthroughs.

bruno

Almost anything including duct tape will work at 0.1 atmosphere. No
sarcasm here, it really will. Epoxy works fine at considerably
below that level. So do O-rings.