1/2" Flow Sensor FS50

The Neptune Systems FS-50 Flow Sensor delivers precise mid-range flow monitoring for your aquarium's critical systems. Measuring between 114–946 L/h, this ½" PVC-compatible sensor integrates seamlessly with the Neptune Apex controller via the FMM Module, providing real-time flow data through Apex Fusion. Perfect for tracking return pump performance, UV steriliser efficiency, and reactor operation, the FS-50 alerts you to flow drops caused by clogs or equipment issues before they impact your tank. Includes two BSPP-to-slip PVC union adapters for secure Australian plumbing integration. FMM Module and Apex Controller sold separately.