Re: "Magnet tamper" for surface mount contact?

[Matt Ion <soundy@xxxxxxxxxxxxxxx>]

Bill wrote:

> Is there a surface mount contact which has some sort of tamper device if the
> magnet is unscrewed from the door? Manufacturer? Model number?
>
> This would prevent the situation where there is a door which opens out,
> there is a surface mount contact on the door frame, a surface mount magnet
> on the door - then intruder attaches magnet to above contact in some manner,
> unscrews magnet from door, then opens door outwards.
>
> So unscrewing the magnet from the door or unscrewing the covering over the
> magnet to then unscrew the magnet from the door would trip the contact...
>
> FYI - This is when the intruder gains access through the ceiling or wall,
> but then exits through a door.

What's the possibility of replacing the current contact and magnet with
recesssed button-style units?  Example:
http://www.home-technology-store.com/rec-security-sensors.aspx

The switch goes into a hole drilled into the door jamb, the magnet into
a hole in the edge of the door; they can be placed anywhere around the
perimiter of the door and are practically invisible and impossible to
remove with the door closed.


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