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Pir Identification


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It a gardtec something or other.Long since passed its change by date.

Originally said by Charles Babbage
On two occasions I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question.

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Coincidence ? The pir's at my property were installed in 1994. However, I see no reason to change them since they are working perfectly. Pick-up patterns, walk tests etc. confirm. Maintenance is limited to cleaning the cover, with a quick check inside (all holes are sealed anyway) and wiping the fresnel occasionally.Probably someone can tell me why they might be, or are, in urgent need of changing.  

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Like any electrical component the mechanical parts (relay) has a finite life, imagine how many times this will have operated, so ime for the sake of a few £'s id be looking to replace.

Nothing is foolproof to a sufficiently talented fool.


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Yes, I thought they worked perfectly. The only reason I can think of is the relay inside is reaching the end of it's working life. Apart from that and the fact they have gone yellow I can't see why they need changing.


Is the ADE  Activ8 any good?

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They are quads from what I can gather. It is worth checking if any structural or other alterations have taken place since 94, also the addition of pets etc. (you know all that already, why am I writing it ?). Provided very little has changed I see no reason to go beyond a standard pir replacement (others would disagree), although these days there is a tendency toward quads, be they ADE or any other make.  

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