Re: Newbie questions

["Bob La Londe" <usenet@xxxxxxxxxxxxxxxxx>]

"Stanley Barthfarkle" <sbarth@xxxxxxxxx> wrote in message
news:CeH7g.67513$_S7.56009@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> Actually, I am not planing to spend $500, more like $200-$300 for one
>> of those wireless system from online site.  I am not going to count on
>> window/door sensors, but rather on motion detector for protection while
>> nobody is home (the main situation for protection).
>
> Need 2 levels of protection for an effective system- perimeter
> (doors/windows) and interior. (motions, tampered drawers or cabinets, etc)
> There is a significant advantage to catching a burglar BEFORE or WHILE
> he's breaking in, instead of after he's already in. Layers of protection
> increase your level of protection, and provide a form of "verification",
> since an intruder moving through a premises will trip mutiple zones of
> protection.
>
>
>> (3) Those pet immune motion detectors: are these thermal based detector
>> such that they only detect living things with thermal radiation, such
>> that the motion of a non-living object won't trigger them (such as a
>> curtain blown by wind thru a window etc.)?
>
> Some are Passive Infrared, some are both PIR and Microwave. Motion of
> anything will trip a detector, since curtains or other objects do not have
> precisely the same Infrared light (heat) signature as background objects.
> A blowing curtain, helium balloons, and many other things will trip a
> motion detector. Proper engineering and setup is vital to false alarm
> elimination and proper catch performance.

Balloons are so much fun.  Milars are the worst.  One call center with a 16
foot ceiling was quite a challenge.  Everytime they had a party for somebody
they would have balloons loose in the building.  The holidays were
particularly fun.  Finally I walked in one day with an air rifle and put a
few holes in their ceiling tiles.  I don't recall having the problem since
then.





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