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D B Sweeney



Joined: 27 Aug 2010
Posts: 2842
Location: Edinburgh, Scotland

PostPosted: Fri Dec 02, 2011 11:53 pm    Post subject: Reply with quote

Ghostfan Tom wrote:

In that case how would you detect a draught?

I think it's all a question of sensitivity snd calibration. As standard such cameras will be calibrated to show different levels of intensity for the temperature range over which they could be expected to be useful, I.E. light for a person or animal and darker for lower temperatures. In that state, a variation of a few degrees probably would be hard to resolve.
That does not mean that such equipment could not be re-calibrated to highlight variations in air temperature over a given range.


There are several low tech ways to detect drafts, I used to use very fine duck down. Drafts are slightly different to temperature fluctuations though in that their predominant trait is that they're directional.
I'm no expert on TIC's but I'm sure they can't be fine tuned to show fluctuations in ambient air temperatures.

DB
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flossy
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Joined: 17 Oct 2006
Posts: 4921
Location: UK tyne/wear (geordie land)

PostPosted: Sat Dec 03, 2011 6:31 am    Post subject: Reply with quote

what happened to the old wet finger, works for me Laughing
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thecactus



Joined: 07 Mar 2011
Posts: 3196
Location: Northern Ireland

PostPosted: Sat Dec 03, 2011 3:27 pm    Post subject: Reply with quote

flossy, Laughing
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bitterbuck1
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Joined: 18 Nov 2006
Posts: 3963
Location: Arizona, USA

PostPosted: Sat Dec 03, 2011 7:53 pm    Post subject: Reply with quote

flossy wrote:
what happened to the old wet finger, works for me Laughing


Laughing
I'm laughing so hard I'm blowing snot.
Laughing Laughing
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flossy
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Joined: 17 Oct 2006
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Location: UK tyne/wear (geordie land)

PostPosted: Sun Dec 04, 2011 4:21 am    Post subject: Reply with quote

Shocked eewwww bitter Laughing hehehe Laughing
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