Dry bulb temperature is the current temperature. A sling Syc. using two
thermometer mounted in a (metal case) side beside and one has a cotton sleeve
on it that is wet and this gives you the wet bulb temp. The two reading are
then used to calc. the humidity. It is generally except as the most actuate
way of determining the actual humidity. The problem with this method is that
the thermometers each has a plus or minus accurate of plus or minus 1 degree.
It is hoped that the error here will be canceled out. The problem is that if
one is wrong on the minus side and the other is off on the plus side, you
won't get the right answer. The instrument is spun at a rapid rate and both
temp are read at the same time. Still is the most correct method known.
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