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Topic Title: Optical Smoke / Fire Detectors
Topic Summary: Commercial vs Domestic
Created On: 13 June 2018 09:03 PM
Status: Read Only
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 13 June 2018 09:03 PM
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michaelbrett

Posts: 1055
Joined: 28 December 2005

Does anyone know if there is a difference in sensitivity between optical commercial (e.g those wired via a CIE) and optical domestic smoke detectors please?

Thanks for any information that may be forthcoming.

Regards

Mike

Edited: 13 June 2018 at 09:15 PM by michaelbrett
 13 June 2018 10:03 PM
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mapj1

Posts: 11223
Joined: 22 July 2004

I have been told that as the centrally wired detectors normally have to survive regular smoke testing, while the domestic are single use, more or less, in practice they are designed more carefully, though the underlying BS standards of what it should detect, are the same.

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regards Mike
 14 June 2018 07:55 AM
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michaelbrett

Posts: 1055
Joined: 28 December 2005

Mike

Thank you for confirming what I thought.

Would you know where I can obtain any documentation supporting this (apart from British Standards), that would state the above in simple terms please?

Many thanks for any assistance

Regards

Mike
 14 June 2018 08:34 AM
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mapj1

Posts: 11223
Joined: 22 July 2004

Not seen it in writing, though I was told it by a sales rep for a well known detector company, though of course he may have been partly justifying a significant price gap. However, certainly with my eye of the electronics designer the internals of the one for central wiring seemed better made, double sided fibre glass PCB instead of single sided paxolin, clearly visible filtering components on the bus lines, more points of support, better braced plastic moulding etc.

-------------------------
regards Mike
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