wrote
Rod Speed wrote
tabbypurr wrote in message

Re PIRs specifically, it's not possible to design a
PIR detector that won't detect a bat landing on it.
Yes you can tell the difference between a cat and
a human at say 5 yards, but when the human
is 15 yards away and the cat 1 yard, it can't.

BULL****.

It's basic physics.

Even sillier than you usually manage with the dual mode PIRs.

with respect I was discussing PIRs not dual technology detectors

The Honeywell PIRs being discussed that allow you to dial in the weight
of the pet that they will ignore are in fact dual technology detectors.