Matt Meerian from Home Brew Electronics has an issue with his basement waterproofing tar seeping into his sum pump pit. As you can imagine cold tar seeping into the pit would cause havoc with the pump and water level detection. He has designed a DIY Internet Sump Pump Monitor to alert him if there is a problem such as the pump running too long or the water level getting too high.
“This project monitors the sump pump without effecting its operation. There are two things monitored:
           1) Is the water level too high in the sump well? If so, send an alert email and activate an audio alarm.
           2) Has the sump pump been on too long? If so, send an alert email and activate an audio alarm.
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I didn’t want the project to control the sump pump in case the MCU locks up or doesn’t not behave correctly. “Do no harm” is the motto I’m going by.”