Ron’s pump tank project. The C-sensor output is a square wave, the frequency is proportional to the water level in the septic pump tank. The output feeds into the C-con box which provides 4 contact closures. The C-con contact closures are fed into the Widgetlords opto-isolated input board and then to the Pi. The Pi communicates to this website which displays tank water level in the diagram above. This is a backup monitoring system. The pump is controlled by a separate float switch.
