At 08:39 PM 6/6/96 +0100, you wrote:
>Does anybody have a table of wey/dry bulb relative humidity values please ?
>Better yet, is there a formula that can be used to calculate the humidity usung
> wet and dry bulb thermometers
>Thanks in advance.
By far the easiest way to determine humidity from dry and wet bulb
temperatures is to use a psychrometric chart. This will give you relative
humidity, absolute humidity, and dew point (or saturation temperature).
Psychrometric charts are available from the American Society of Heating,
Refrigerating, and Air-conditioning Engineers (ASHRAE).
It is also possible to calculate these values, but that is much more
complicated. ASHRAE has a handbook that contains all the necessary information.
If you have access to Excel, you can download a program from the WWW at
http://www.ior.com/~randyw/engrproj.html that can do all these calculations
Marc van Iersel E-mail: mvanier at gaes.griffin.peachnet.edu
Department of Horticulture Tel: (770) 412-4766
University of Georgia Fax: (770) 412-4764
Griffin, GA 30223-1797