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stargateonly
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Join Date: Sep 2008
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Hydrocarbon Dew Point vs. Water Dew Point

08/18/2009 3:57 AM

What is the difference between Water dew point temp, Hydrocarbon dew point temp and operation Temp?

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PWSlack
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#1

Re: Difference between Hydrocarbon dew point & water dew point and operation temp

08/18/2009 4:29 AM

The temperature and the materials.

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stargateonly
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#2
In reply to #1

Re: Difference between Hydrocarbon dew point & water dew point and operation temp

08/18/2009 4:45 AM

Hi PWSlack,

I don't understand your reply. Could you elaborate further?

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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
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#3
In reply to #2

Re: Difference between Hydrocarbon dew point & water dew point and operation temp

08/18/2009 4:52 AM

The physics is the same: phase change on cooling. It's only the materials and the temperatures at which it happens that differ.

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Anonymous Poster
#4
In reply to #2

Re: Difference between Hydrocarbon dew point & water dew point and operation temp

08/18/2009 12:33 PM

Please look at the first page of this link

http://www.iceweb.com.au/Analyzer/MoistMeas/Dark%20spot%20principle.pdf

Hope this will clarify.
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Anonymous Poster
#5

Re: Hydrocarbon Dew Point vs. Water Dew Point

10/22/2009 7:29 PM

Can anyone elaborate on the accurate measurement of the dew point of Air/N2 that has trace amounts of HC vapors? e.g. how much HC is too much for a "standard" dewpoint sensor (Vaisala, Shaw, etc.)

Thank you!
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Meter Man
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Join Date: Oct 2009
Posts: 4
#6
In reply to #5

Re: Hydrocarbon Dew Point vs. Water Dew Point

10/22/2009 9:34 PM

I have run into problems with HydroCarbon contamination of dew point sensors, but I cannot say for certain "how much is too much". I know for certain that if you flood the sensor with oil it is "too much". Any information I have found on this subject is short on facts. I will keep looking.

Cheers.

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