High water level turns the pump on and low water level turns the pump off. The alert level can start a standby pump and sound an alarm.
A green LED on the controller is lit to show that the pump is commanded to pump.
A red LED on the controller is lit when the high water alert contact closes.
The sensor is separated from the pump controller to increase reliability, simplify installation and speed up diagnosis.
The pump controller is installed close to the submersible or remote pump, but out of the water.
The sensor can be tested and cleaned without uninstalling.
For Auto/OFF/Manual switching, use any commercial products.