Prosonic S FMU90 is an ultrasonic level controller that connects one or two FDU9x sensors, providing a large LCD display, up to six relay outputs, and flexible housing options for pump and process control. Size: Field, DIN rail, or panel housing (controller unit, paired with separate FDU9x sensors) Application: Lift station/pump control, bar screen control, storage tanks, stormwater basins, open channel flow Measuring Principle: Ultrasonic (Time-of-Flight) controller, 1 or 2-sensor input, up to 6 relays, large LCD Measuring Range: 0-45 m (with FDU9x sensors) Process Temperature: -40 to +60°C Material: Field housing (polycarbonate/aluminum) or DIN rail housing (PBT) Key Features: Connects 1 or 2 FDU9x ultrasonic sensors simultaneously Up to 6 relay outputs for pump and alarm control Large LCD for local monitoring and diagnostics