On Mon, 12 Feb 2007 23:59:08 GMT, "Dorothy Bradbury"
mused:

Add...
o Visonic ceiling PIR -- wiring neatly hidden in ceiling voids, 86mm dia
o Screened alarm cable -- just seems like a very long aerial otherwise

Cross mains at 90-degrees, keep 9-inches away. However when you
have innumerable taxi masts, to aircraft UHF blasts nearby it is prudent.
Costs only about £4 more a reel and might just reduce the odd false.

If you're using screened alarm cable make sure you earth it at one end
only, usually at the panel.

Scantronic are well regarded, will take a look.
If it takes a 7Ah battery then it sounds a better option.

Only thing that puts me off Scantronic is it's user friendliness. It
has deteriorated since the new range of panles came out.

--
Regards,
Stuart.