In reply to  Jeff Driscoll's message of Sat, 22 Jan 2011 21:24:36 -0500:
>This probe does not measure the amount of liquid water droplets in the
>"steam" (ie. mass fraction of water vapor to to total water).  It measures
>Relative Humidity (Relative Humidity measures how saturated the air is for a
>given temperature).
>What we want is a a device that measures "quality" of the steam.  For
>reference, 100% quality = 100% vapor.

Consider that droplets can't form unless the RH is 100%. Anything less than that
and no droplets form.
In short if they measure an RH < 100% then the steam must be dry.

Robin van Spaandonk

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