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11-24-2010, 06:08 PM | #1 |
I'll get up and fly away
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A real hygrometer
So, we all use little hygrometers in our 'dors. They are run with a little electrical cell that varies according to the RH. But, in a lab, you use a more fundamental measurement instrument called a wet bulb/dry bulb hygrometer. Basically, one of the thermometers is kept in a wet sleeve. This is cooled by the evaporation. This difference between the two can be converted to RH.
This is the one we built for the lab where I work. And, no salt test is needed! |
11-24-2010, 09:55 PM | #5 |
I'll get up and fly away
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Re: A real hygrometer
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11-24-2010, 10:04 PM | #6 |
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Re: A real hygrometer
Very cool. They make smaller ones. The military uses them to determine humidity and in addition to the temperature we determine the heat category. Heat Category determines work/rest cycle and changes in uniform/hydrations cycles.
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