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Dave Plowman (News) Dave Plowman (News) is offline
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Default Alarm question - PIRs, window contacts or optical boundary?

In article ,
Bill Wright wrote:
Personally I'd forget window contacts. They do false alarm if there's a
gust of wind or a bird hits one.


Eh? If you're talking reed switches you'd need a pretty terrible fitting
window before wind would break the circuit. And if things like that are
flapping around in the wind, a PIR might well trigger too.

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