Re: Choosing PIR sensors

[Nigel Orr <nigel.orr@xxxxxxx>]

At 14:30 23/05/99 +0100, you wrote:
>mirrored optics to be the most reliable. This means that position of
the
sensor
>is not so critical, i.e.. looking at large areas of glass.

Thanks, that's interesting.  Is it still better to avoid having the sensor
mounted on the wall opposite the window though, or doesn't it matter?  The
position which would be best for HA (to see someone immediately they enter)
would have the sensor pointing at the window, so I'd decided against it for
security's sake- I presume it's still better to keep it like that?

>I am not a fan of
>Duel Tech sensors and would rate the alarmcoms as more reliable every
time.

What is the problem with Duals, in your experience?  False triggers, or
missing movement?  Or just longer term unreliability due to increased
complexity/component count?

Nigel
--
Nigel Orr                  Research Associate   O   ______
Underwater Acoustics Group,              o / o    \_/(
Dept of Electrical and Electronic Engineering     (_   <   _ (
University of Newcastle Upon Tyne             \______/ \(

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