double knock = wrong detector.

Arfur has a bald chest apparently

Hi guys,

Thanks for the replies and healthy debate on the merits of a cat!

Yes, it's a cat. At least the dog goes in it's crate......

Engineers code not a problem, I have it, and a manual which seems to be an installers guide as it gives a lot of info about location and zone setting but little technical info like requirements of PIRs!

One sensor does look at the stairs, I was hoping that the pet friendly would cope with that? Leaping onto furniture is a worry, he does enjoy that.

I notice that some sensors list different Hertz ratings, do I need to worry about that?

Peter

they will be microwave based or your looking at rf immunity info.

probably best to find or create a sensor thread re pets