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Intruder, Fire, CCTV, Emg Light, Access Control
Intruder alarm upgrade - old vs new sensors
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<blockquote data-quote="Geoff1946" data-source="post: 506867" data-attributes="member: 28452"><p>In your circumstances I would definitely replace the lot. Nothing lasts for ever and it appears your kit could be 10 to 20 years old.</p><p></p><p>PIR sensors, (the clever bit within the unit), become electronically noisy with age, reducing their performance whilst increasing probability of false alarms.</p><p></p><p>Door contacts use magnets, which gradually lose strength, and reed switches whose contacts degrade.</p><p></p><p>Why not have one or two of the old PIR sensors in the conservatory where a potential intruder can see them, but not wired? i.e. just a visual deterent. Then have your door sensors for real.</p><p></p><p>The further point is that if you make it a "new" installation the installer will be unambiguously responsible for its correct operation.</p></blockquote><p></p>
[QUOTE="Geoff1946, post: 506867, member: 28452"] In your circumstances I would definitely replace the lot. Nothing lasts for ever and it appears your kit could be 10 to 20 years old. PIR sensors, (the clever bit within the unit), become electronically noisy with age, reducing their performance whilst increasing probability of false alarms. Door contacts use magnets, which gradually lose strength, and reed switches whose contacts degrade. Why not have one or two of the old PIR sensors in the conservatory where a potential intruder can see them, but not wired? i.e. just a visual deterent. Then have your door sensors for real. The further point is that if you make it a "new" installation the installer will be unambiguously responsible for its correct operation. [/QUOTE]
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Intruder alarm upgrade - old vs new sensors
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