Re: Advice on sensors, please

["Frank Olson" <feolson@xxxxxxxxxx>]

"Old Dad Smith" <oldmistersmith@xxxxxxxx> wrote in message
news:1119563551.566133.141340@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> The plan may be misleading - there is no partition between the Playroom
> and Lounge room, only a couple of steps. Therefore, I am hoping that
> sensor 5 will cover the 30 ft. distance to the patio doors and detect
> someone breaking the glass.
>
> I intend to use combined PIR/microwave sensors to avoid radiators
> triggering the alarm.


Poor layout.  You've got motion sensors looking at south facing windows.
You've got no contacts on other entry doors which will restrict your use of
the system while you (or your family) are at home.  A PIR of any sort in the
kitchen isn't required unless you're using gold faucets.  Taking out #3, and
moving #1 to the South east corner of the dining room would be better.
You'd cover a good portion of the kitchen there as well.  A sensor in the
living room would be best in the South West corner.  Glass breaks and
contacts for the patio doors in the "lounge room".  PIR in the north east
corner of the utility room (where you indicate #6).  If you have pets, the
motion looking up the stairs isn't a good idea (even if you're planning on
using "combination units") and you may have to mask the lens.  If the walls
aren't up yet (drywalled), I'd rethink your system to incorporate more
perimeter type sensors (even if you just pre-wire for them at this stage,
you can expand on the system as your budget allows.  Contacts on the windows
that open, glass break detectors, security screens, etc.  What about
pre-wiring for system smoke detectors, CO, and heat??  You don't need more
than two PIR's for the main floor if you're going with a perimeter system,
and those should cover the areas/rooms with stairs to the second or basement
levels.  For instance, your PIR #4 won't see the stairs going down to the
basement (I'm assuming the door adjacent to the back door is the door to the
basement).  Moving it to the corner adjacent to the kitchen door would
probably be better, but you're going to have to be careful with the
radiators in this area as well.  It's a nice house-plan though...