产品描述The LVCN-20 dual sensor controller is ideal for automatic filling or emptying operations. The controller conveniently mounts to a single sensor or to the sensor track system. This single channel controller offers a latching, automatic fill or empty operation between two sensor inputs. An adjustable time delay feature from 0 to 60 secs. before the relay responds assists in pump and valve protection. The invert and latch switch also expand the flexibility of the controller.