[CAUT] Hygrometers

[johnsond]

The sling that I use is rather small and you only need to whirl it 
around with your wrist for a couple minutes.  It is preferred to use 
distilled water, but tap can do.  There is no question that it is much 
less convenient, and of course breakable, but I have used mine with no 
problems for at about 20 years. This one was made by Weksler 
Instruments, but I can't remember where from.  One small compensation 
for the inconvenience is that the final reading tends to carry more 
clout with the people who can make changes.  I once used a $150.00 hand 
held digital model from Pacer Industries, Inc. -  until I learned it was 
supposed to be sent back to the factory annually for re-calibration.  
Now it sits in a junk drawer. 

Gotta love Fridays~

Dennis Johnson
St. Olaf College