For the level sense circuit have a look at these chips ... http://www.qprox=
.com/products/qlevel.php=20

For isolation I would use a wal-wart power supply (high current of course) =
with relays driven by opto-isolators.
You were going to mount everything in a sealed box well away from the =
water right?

>>> picdude@AVN-TECH.COM 03/28/02 03:19AM >>>
Hi all,
<snip>

The new system will have:
 - 2 water level sensors -- one f/normal shutoff, other on floor f/alarm =
(??)
 - Temp control
 - 2-button / 3-LED display interface to set the desired temp.
 - PIC timer as a last-resort shutoff.

<snip>

Thanks much,
-Neil.

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