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From: rick@cadtec.UUCP (Rick Auricchio)
Newsgroups: net.analog
Subject: Re: How Dry I Am
Message-ID: <90@cadtec.UUCP>
Date: Fri, 26-Apr-85 17:17:04 EDT
Article-I.D.: cadtec.90
Posted: Fri Apr 26 17:17:04 1985
Date-Received: Thu, 2-May-85 01:07:10 EDT
References: <238@aluxp.UUCP> <4097@mit-eddie.UUCP>
Reply-To: rick@cadtec.UUCP (Rick Auricchio)
Distribution: net
Organization: Cadtec Corp., San Jose CA
Lines: 21

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I think the ultrasonic thing is out.  Remember, he said he's using a
*submersible* pump, which usually means that the water level is quite deep
(say, >150 feet down).  The transducer probably won't do at all, especially
since the well casing is metal.

Several (must be 15-20) years ago we had a well with a submersible pump. I
seem to recall it being 330ft deep, with a "static level" (water level) of
about 180ft.  This level was tested with a wired probe.  The probe, being
lowered by hand, didn't hurt the pump, but then the pump wasn't running.
I recall the well guys could also determine flow rate of the well by seeing
how fast you could draw water (with the pump running) before the static level
dropped.  Might be worth asking a well company for info on this.

Echoes, by the way, were spectacular.  Unfortunately, there were dozens of
repeats so I think even the speaker idea is a loss.
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