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From: (no name) (no email)
Date: Tue Aug 26 2003 - 10:34:51 EDT
In a message dated 8/26/03 12:04:14 AM,
writes:
<< I am thinking of going over to some kind of smart switch
which senses the water level, and runs for a few seconds after the low level
is reached. And more importantly does not need to move - I have checked a
couple of catalogs and they seem to run about $24-25 - does anyone have any
pet recommendations for this kind of switch? >>
I have used several of these switches, most recently the Bilge Sentry by Aim
Technologies Inc. in Cape Coral, FL. They sense water level by a probe or by
dual contacts which electronically trigger a higher capacity internal switch
that controls the bilge pump. All have failed within two years of installation,
usually by failing to shut off. The Bilge Sentry failed this weekend,
unaccountably triggering the pump 161 times over a two day period, then burning out.
I suppose this should be expected. Smart switches contain several very
sensitive electronic components yet operate in the very inhospitable bilge
environment, immersed in salt water and subject to high vibration. The fail safe
suggestion would be to use several mechanical switches in parallel, plus an
emergency switch above the usual bilge water level. I also like the pneumatic switches
that sense the height of a water column using the slight increase in air
pressure to trigger a diaphragm switch.
Incidentally, does anyone know if Aim Technologies, Inc. of Cape Coral, FL is
still in business? Their switch came with a lifetime guarantee, but I suppose
it means the lifetime of the business.
Larry Z
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