On Mon, 2 Feb 2009 13:42:20 +0000 (UTC), G. Morgan
wrote:

Puckdropper puckdropper(at)yahoo(dot)com wrote:

I've done some Google searching, checked the archives of this group for
relavent recent discussion, and have thus far come up with nothing useful.

We have a water softener and dehumidifier that drain in to the sump pump.
The sump pump output pipe froze, causing the discharge from the softener
regeneration to back up into the basement. I'm looking for a high water
alarm that can cut the power to these devices in case something happens
again.

Does anyone know of such a thing?

Roll your own with this:
http://www.winland.com/WB-200.htm

and use a relay to shut down the softener & dehumidifier.
Be careful you don't remove power from the softener when it is dumping
water out the drain. Depending on the design, it might just continue
filling the basement with water because there is no power to close the
valve.