1/2" Flow Sensor FS50

Neptune Systems FS-50 Flow Sensor – ½"

Know Your Flow. Monitor It Reliably.

Overview

The FS-50 Flow Sensor is a mid-range flow monitoring device designed for use with the Neptune Systems FMM (Fluid Monitoring Module). It measures flow in standard ½" PVC plumbing, making it ideal for return lines, UV sterilisers, reactors, and other flow-critical systems.

When connected to a Neptune Apex via the FMM module, the FS-50 delivers real-time flow data to Apex Fusion — helping you track system performance, spot trends, and detect anomalies before they become problems.

Requires Neptune Systems FMM Module and Apex Controller (A2 or A3 Series).

Key Features

• Measures flow between 114 – 946 L/h (30 – 250 GPH)

• Compatible with ½" Slip PVC plumbing

• Includes two BSPP-to-slip PVC union adapters

• Plug-and-play with FMM Module (sold separately)

• Enables real-time monitoring via Apex Fusion

• Ideal for medium-flow systems like return pumps or reactors

Use Cases

• Monitor return pump flow rates

• Track performance of UV sterilisers or media reactors

• Detect reduced flow from clogged plumbing or equipment

• Automate alerts when flow drops below safe levels

Plumbing Compatibility

The FS-50 sensor body is threaded with BSPP (British Standard Parallel Pipe) threads and comes with:

• 2x PVC union fittings

  • BSPP to ½" slip
    These adapt the flow sensor to standard ½" PVC plumbing, ensuring secure, leak-free integration with Australian pipework standards.

Specifications

• Flow Range: 114 – 946 L/h (30 – 250 GPH)

• Connection Size: ½" Slip PVC (via included unions)

• Thread Type (Sensor): BSPP

• Required Components: FMM Module, Apex Controller

What’s Included

• 1x FS-50 Flow Sensor (BSPP-threaded)

• 2x BSPP to ½" Slip PVC Union Adapters

Note: Requires Neptune FMM Module and Apex Controller (sold separately).