Two Hygrometers. Two VERY Different Readings. Please Help.

[prflani]

Originally Posted by mhotek

...every psychrometer comes with a 40+ page booklet of RH charts plotting temperature against water content variances.

Psychrometers use differential temperature between a wet bulb and dry bulb thermometer. Thus, they require very complex consideration of the temperatures involved, the water content involved, and the atmospheric pressure, hence the need for those charts. The hygrometers typically used in our cigar related applications are not "psychrometers" - they use a completely different approach to obtaining the RH...