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Registered: 11/17/01
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Humidity Question ( People good a science needed)
    #557042 - 02/20/02 01:23 AM (22 years, 3 months ago)

Anyone know the dewpoint for 95-100% humidity? Im just curious cuz Im wondering why Im not getting condensation in my chamber, and its scaring the hell out of me. My hydrometer says 97% humidity. The inside temp is 74degrees and my room is 69.7 degrees, so Im hoping its the even inner and outer temps.



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Registered: 06/17/99
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Re: Humidity Question ( People good a science needed) [Re: Northernsoul]
    #557181 - 02/20/02 06:44 AM (22 years, 3 months ago)

If you have 95% humidity and 74?F, and you assume the glass has the outside temperature of 70?F(unrealistic), then you must see quite some condensation.(theoretical relative humidity at glass of 116%)

If you assume that the temperature of the inside surface of the glass is 2 degrees colder than 74?F, then the relative humidity at the glass would just be 102%(according to calculation,) which means there would have to be some condensation to bring the relative humidity to the maximum possible 100%, but very, very little if at all visible.

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Re: Humidity Question ( People good a science needed) [Re: Anno]
    #557315 - 02/20/02 09:21 AM (22 years, 3 months ago)

the dewpoint (condensation) is the temp at which saturation occurs (the relative humidity reaches 100%)... rh is directly related to temperature, the warmer the air the more moisture it can hold before reaching the dewpoint and the opposite holds true for colder air. i have a chart of the approx. dewpoints for various temps at home... i probly couldnt know em all off the top of my head... ill check when i get home and post tomarrow

but as an estimation: if you have it at 74 degrees F and 97% rh the dewpoint would probly be something like 70 degrees or so...

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