[Greenbuilding] Measuring DesiccantHumidity

[Andrew Golkin]

http://www.jondon.com/extech-rh390-thermo-hygrometer.html

That's a reasonable unit that we use with our desiccant dehumidifiers.  If
you need Grains Per Pound  then the RH490 is the way to go.  Just make sure
you size it right with a professional otherwise you could start seeing
cracking in the drywall/trim joints and any wood floors could also show
issues.




*         PDRVIRGINIA.COM <http://WWW.PDRVIRGINIA/COM>              PDR on
FACEBOOK - Like Us! <https://www.facebook.com/PDRofVA>*


On Thu, Jun 6, 2013 at 10:14 PM, Bob klahn <Home-NRG at dnaco.net> wrote:

>  Eli,
>
> There is a company in Xenia, OH which has been specializing in dessicants
> for 60 years.
> W.A. HAMMOND DRIERITE CO. LTD. P.O. Box 460 *Xenia*, *OH* 45385. Phone (937)
> 376-2927
>
> I'm sure there are more elegant methods of measuring dessicant humidity
> but they make a paper card with humidity sensitive color change patches, to
> tell when the dessicant is saturated and it is time to dry it out for reuse.
>
> I'm sure that they could provide the technical information you are looking
> for.
>
> Bob Klahn
>
> **
> On 6/6/2013 7:46 PM, conservation architect wrote:
>
> I am interested in dabbling with desiccants this summer to dehumidify in
> the house and dry externally with a heat source.  This is primarily a
> learning exercise more than proposing a specific apparatus.
>
> Can you recommend a device or method to to measure relative humidity in
> the dessicant.
>
> My plans are to purchase bentonite clay.  ASHRAE says a desiccant will
> absorb moisture until it meets the same relative humidity as the ambient
> air.  Therefore the quantity needed has to be sufficient to absorb in the
> range of relative humidity I might anticipate.  If I am dehumidifying 75F,
> 80% RH to 75F, 50% RH, The dessicant must be a lower RH, say 20% to
> increase to 50% relative humidity.  Of course the real amounts will depend
> on the relative size of each.  Those numbers would work if both desiccant
> and air hold the same amount of moisture at saturation.
>
> Eli
>
>
>
> _______________________________________________
> Greenbuilding mailing list
> to Send a Message to the list, use the email address
> Greenbuilding at bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
>
> http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org
>
>
>
> _______________________________________________
> Greenbuilding mailing list
> to Send a Message to the list, use the email address
> Greenbuilding at bioenergylists.org
>
> to UNSUBSCRIBE or Change your List Settings use the web page
>
> http://lists.bioenergylists.org/mailman/listinfo/greenbuilding_lists.bioenergylists.org
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.bioenergylists.org/pipermail/greenbuilding_lists.bioenergylists.org/attachments/20130606/f1c8e922/attachment.html>