1/4" Flow Sensor FS25

Neptune Systems FS-25 Flow Sensor – ¼"

Know Your Flow. Monitor It Precisely.

Overview

The FS-25 Flow Sensor is a compact, plug-and-play sensor for use with the Neptune Systems FMM (Fluid Monitoring Module). It measures water flow in ¼" (6 mm) push-connect tubing, making it ideal for low-flow applications such as dosing systems, RO/DI lines, or low-rate return plumbing.

With a compatible Apex system and FMM module, the FS-25 reports real-time flow rate data via Apex Fusion, helping you fine-tune equipment and detect flow anomalies.

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

Key Features

• Monitors flow rates between 11 – 45 L/h (3 – 12 GPH)

• Connects to ¼" push-connect (RO/DI-style) tubing

• Provides real-time feedback to Apex Fusion

• Easily installed inline with soft or hard tubing

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

• Suitable for monitoring return lines, reactors, dosing systems, and more

Use Cases

• Return pump flow monitoring for nano systems

• Water flow verification in dosing or nutrient control systems

• Real-time flow alerts for equipment failure or clogging detection

• Compatible with both hard-line RO tubing and soft ¼" tubing (adapters sold separately)

To adapt soft ¼" tubing, use a ¼" stem x ¼" barb adapter.

Specifications

• Connection Type: ¼" push-connect (6 mm OD)

• Flow Range: 11 – 45 L/h (3 – 12 GPH)

• Sensor Type: Mechanical

• Required Components: FMM Module, Apex Controller

What’s Included

• 1x FS-25 ¼" Flow Sensor with push-connect fittings

Note: FMM Module, Apex Controller, and tubing sold separately.