> Are there any clever ways to detect waterflow in a hose/tube?

There are many commercial flow meters available that mostly work on having
the liquid drive a mechanical impeller.  I saw a flow meter in a research
lab once that worked on a magnetic principle.  The flow cut accross a
magnetic field, which induced a voltage in the orthagonal direction.  The
navy was funding the research.



********************************************************************
Olin Lathrop, embedded systems consultant in Littleton Massachusetts
(978) 742-9014, olin@embedinc.com, http://www.embedinc.com

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