Line Sensor for Dryrun Line Sensor for Dryrun Line Sensor for Dryrun Two S.S sensors mounted on the pipe.It uses with water level controller to detect water in the sump.Suitable to any water level controller.There are two types of applications1 if you want to start the motor when water comes in t sensor then it require an underground tank controller.2 if you want to stop the motor when water comes in t sensor then it require an overhead tank controller Buy Now Ask