Motion detection in plenum
Motion detection in plenum
(OP)
Hi,
I thought I would seek out suggestions on a challenge we have been trying to figure out for the last couple of weeks. Our client wants to put motion detection (of some sort) in the ceiling space above suites within their building (a data center).
The challenge we have is the ceiling space is a plenum and there doesn't seem to be any plenum rated devices suitable for this purpose. We can build a box around the sensor but this voids the operation of most types. We found an RF device which we could put in a drywall enclosure but this is a 2.4 GHz device which they will probably push back on as it could interfere with Wifi.
Our only viable option so far is a (plenum rated) fiber optic cable which would detect motion if disturbed. this would work but will be costly and difficult to install insitu.
does anyone have any insights into this? any brilliant suggestions?
I thought I would seek out suggestions on a challenge we have been trying to figure out for the last couple of weeks. Our client wants to put motion detection (of some sort) in the ceiling space above suites within their building (a data center).
The challenge we have is the ceiling space is a plenum and there doesn't seem to be any plenum rated devices suitable for this purpose. We can build a box around the sensor but this voids the operation of most types. We found an RF device which we could put in a drywall enclosure but this is a 2.4 GHz device which they will probably push back on as it could interfere with Wifi.
Our only viable option so far is a (plenum rated) fiber optic cable which would detect motion if disturbed. this would work but will be costly and difficult to install insitu.
does anyone have any insights into this? any brilliant suggestions?





RE: Motion detection in plenum
Good lick,
Dave
RE: Motion detection in plenum
I'd be happily proven wrong with a link!
RE: Motion detection in plenum
TTFN
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RE: Motion detection in plenum
RE: Motion detection in plenum
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
[IMG http://tinyurl.com/7ofakss]
Need help writing a question or understanding a reply? forum1529: Translation Assistance for Engineers
Of course I can. I can do anything. I can do absolutely anything. I'm an expert!
There is a homework forum hosted by engineering.com: http://www.engineering.com/AskForum/aff/32.aspx
RE: Motion detection in plenum
the RF sensor we found which can be boxed into drywall while still detecting presence in the plenum was a really good compromise at first - it could tecnically be removed from the plenum while still detecting within it. When we realized that the 2.4 GHz operational frequency would impinge on wifi bands this became less rosy.
I thought I would punt the question out to the crowd to see if anyone knew of any other sensor which might be able to be adapted in a similarly novel way.