On Mon, 05 Aug 2013 22:31:08 -0500, Unquestionably Confused wrote:

No problem, Larry. Hit Radio Shack and pick up a small piece of printed
circuit board with copper on each side, separated by the phenoic board
(you can find it pretty thin)

Take a very thin wire pair (teleco wire should work) and solder one wire
to each side. At the other end, terminate it with a miniature switch
and then encapsulate the switch (just tidying up - not really necessary.
Let the switch dangle and turn off the detector when you need to.

I like that idea - thanks. I've even got the copper coated phenolic - I
use it for HO scale railroad ties and solder rail to it :-).

Hmmmm - I may have to do the same thing in the train room so the
soldering won't set it off. Although it hasn't so far.

--
When fascism comes to America, it will be wrapped in the flag and
carrying a cross.