We had a bit of rain here recently, so the next project is a sensor to warn when the water level gets too high in the sump pump crock.
Will be doing some experimenting, but thought I might as well ask first. I've checked out the method used by Botanicalls, and have seen similar approaches one or two other places, so that might be one place to start. Years ago, I designed a TTL-based water level controller that used LM1830 Fluid Detectors. Those worked well, but are no longer made, and I haven't been able to find anything similar. Maybe that's overkill anyway. A float switch is another approach, but the no-moving-parts solution is appealing.
All input appreciated!