RE: Alarm contacts in PVC windows

["Des Gibbons" <des@xxxxxxx>]

Hi Jean-Stefane,


> Here is my experience -
>
> When we built our house about 5 years ago, virtually all windows are
PVC
> slider in a frame. I mounted the switch/sensor part of the contact
in
> the fixed frame "sill" about 9 inches from the corner. I
then placed two
> "low profile" magnets in the frame of the double glazed
window using a
> jig.

I don't suppose there is any chance you could send me a photo of the
magnets
in the frame?

>
> The magnet is only about 1/2" long and fit within the frame of
the
> window without getting too close to the glass assembly. I used a jig
so
> I could make sure I did not drill too deeply in the frame so as not
to
> break the seal of the double glazed glass assembly. It also ensured
that
> the magnets would always be in the right location (this is important
as
> the smaller magnets have a lower "gap" tolerance).

Did you feed the cable out thru the fixed frame directly into the wall?

>
> As an added bonus, using two magnets allows me to alarm the window
when
> it is closed or partially opened (6") for ventilation. Anyone
opening
> the window further would trigger the alarm.

Now that sounds great!

>
> The key here is to contact the manufacturer of the windows and make
sure
> you know how much space there is between the outside of the frame
and
> the seal of the glass assembly. This took a bit of work but in my
case
> they finally gave me some drawings so I could figure it out. Gave
myself
> some room for error (there's mostly) and built a jig. It worked
very
> well.

OK, I will go get some flush contacts and get some measurements from
the
window supplier. Glad to hear that someone else had success :)
>
> If you want more info, let me know. Hope this helps.

It helps a lot, thanks for the info!

Cheers, Des.

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