On Mon, 14 Oct 2019 20:56:44 +0100, Chris Green wrote:

Jim K... wrote:
Chris Green Wrote in message:
I want to fit a PIR to a corner of the house so that it will detect
people approaching along either of the adjacent walls. Strictly
that's 270 degrees but I've never seen a 270 degree PIR. :-)

I can't see anything that obviously fills the bill from Screwfix or
Toolstation.

Can anyone recommend something that will do the job and won't cost an
arm and a leg?


I've tried a few economical ones over the years but they all seem
to lose sensitivity pretty quickly compared to the Steinel that
they replaced...

Currently got a microwave sensor on another outdoor light, that is
doing very well.

Yes, I was wondering if a microwave one might be more reliable. What
make is the one you've got?

Microwave ones are prone to triggering on heavy rain/snow. The
cheaper ones are all more or less 360deg but with the front
sensitivity higher than rear and flank.

If you want to play with the modules they cost about 85p each from
Aliexpress including postage from China!