On 02/04/2018 22:48, Steve Walker wrote:
On 02/04/2018 15:04, Brian Reay wrote:
On 02/04/18 14:17, Dave Plowman (News) wrote:
In article ,
Â*Â*Â* Brian Reay wrote:
I was discussing fitting a burglar alarm with my son-in-law and the
problem of their cat occurred to me.

While they could confine the cat to a room not covered by a PIR, the
layout of their house would make this far from ideal in a number of
ways.


I can't believe I'm the first person to think about this problem- what
to the millions of people with cats/dogs do?


Pet proof sensors. Basically, the lens is designed to ignore low moving
objects like cats or dogs. Work OK here.


I'm not a cat owner but don't they climb on sofas etc?

Some sensors are like that, but not all. Others use a PIR which is
designed to ignore small, moving heat sources, while still picking up
larger ones.

Ours also combines this with microwave sensing - which I assume is also
size dependent - and only triggers when both PIR and microwave sensors
are triggered.

SteveW

If you find they work OK (ignoring pets and noticing people) it would be
useful to know the make/model