> So I'm currently looking at using
> the pressure in the sealed tank as an indication of the amount of water
> taken on.

That means you will really be measuring the volume of air in the tank times
the temperature.


*****************************************************************
Olin Lathrop, embedded systems consultant in Devens Massachusetts
(978) 772-3129, olin@cognivis.com, http://www.cognivis.com

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