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'Just thinking...[OT]'
2000\02\18@124258 by Robert A. LaBudde

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<x-flowed>At 08:39 AM 2/18/00 -0500, Mac wrote:
>A while back I gave some thought to measuring the specific gravity of a
>liquid under program control.
>
>The usual constraints applied:
>
>- inexpensive
>- ease of use
>- reliable
>
>I just got to thinking about it again the other day.
>
>I would be interested in hearing some other peoples thoughts on the problem.

The standard electronic method today is a vibrating tuning fork. The
density of the liquid appears in the differential equation of the oscillation.

Unfortunately, it was patented, so these devices are still very expensive
(~ $2,000 to start, now in hundreds). The patent should be running out in
the next few years, though.

================================================================
Robert A. LaBudde, PhD, PAS, Dpl. ACAFS  e-mail: spam_OUTralTakeThisOuTspamlcfltd.com
Least Cost Formulations, Ltd.                   URL: http://lcfltd.com/
824 Timberlake Drive                            Tel: 757-467-0954
Virginia Beach, VA 23464-3239                   Fax: 757-467-2947

"Vere scire est per causae scire"
================================================================

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