Re: humidity sensor

["Alexander Vasilyev" <vassilie@mail.pnpi.spb.ru>]

Dear Peter, 

We discussed humidity many times and there are many opinions. We spent for the discussions much more time (and money!) then necessary for the precise measurements in our real conditions - 10 bar of hydrogen, few liters per minute flux and our range 
of humidity. 
We have options:
1. Send humidity sensor to the firm for the calibration in real conditions.
2. Borrow "mirror" technique and use in PSI for the calibration in our conditions.
3. Create the "known" humidity by the cryo technique (proposed by me) and calibrate HS.

We checked few times calibration curve. We used different sources for the dependence - humidity - dew point and the differences are not bigger then few %.
We checked few times conversion current signal to the number on the "screen" and this conversion is OK.
We have to check again to exclude the "stupid mistakes" but probability of it is low.

With best regards   Sasha.


 Vasilyev Alexander

Petersburg Nuclear Physics Institute,
Laboratory of Cryogenic and Superconductive Technique.