On Sun, 2 Feb 2003, Roman Black wrote:

*>Peter L. Peres wrote:
*>
*>> What kind of rain detector ? The kind with a funnel that leads to a bootle
*>
*>A bootle?? :o) Sorry for the levity but it's saturday
*>night relaxation here and the word "bootle" just
*>tickles my funny bone. <grin>

The word bootle does not ring any bells here. Must be a private joke. You
(down there) seem to have lots of those. <duck>

*>More seriously, I think any proper liquid measuring
*>system should keep one step removed from liquid
*>properties, *especially* liquid electrical properties.
*>Maybe ulrasonic ranging to the top of the liquid, or
*>pressure tube bubbling through the liquid, or even
*>float levels etc all seem to be more reliable systems
*>than conductivity or capacitance testing, and much
*>more sensible than your typical bootle test... ;o)

Well the real good humidity measuring systems use radionuclides afaik.
That would be fairly *connected* to material properties. Of course you
know what scum, foam, turbulence and bubbles do to sound propagation in
the liquid ?

Peter

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