1" Flow Sensor FS100

Neptune Systems FS-100 Flow Sensor – 1"

Know Your Flow. Monitor High-Volume Systems with Precision.

Overview

The FS-100 Flow Sensor is designed for use with the Neptune Systems FMM (Fluid Monitoring Module) and is ideal for high-flow aquarium systems. It connects to standard 1" slip PVC plumbing and is commonly installed on return lines, large closed-loop systems, or external filtration circuits.

With a supported flow range of 568 – 5,678 L/h (150 – 1500 GPH), the FS-100 allows aquarists to accurately track and monitor flow performance in real time via Apex Fusion, helping prevent equipment failure and maintain optimal system stability.

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

Key Features

• Measures flow between 568 – 5,678 L/h (150 – 1500 GPH)

• Designed for 1" slip PVC plumbing

• Uses BSPP-threaded sensor body with included adapters

• Plug-and-play connection to FMM Module

• Ideal for high-capacity return pumps, UV systems, or external loops

• Enables alerts and real-time graphing via Apex Fusion

Use Cases

• Monitor large return pump flow rates

• Track performance of external filtration systems

• Automate alerts if flow drops below expected levels

• Help detect clogs, pump wear, or system inefficiencies

Plumbing Compatibility

The FS-100 sensor body uses British Standard Parallel Pipe (BSPP) threads and includes:

• 2x PVC union adapters:

  • BSPP to 1" slip
    These unions allow easy integration with standard Australian 1" PVC pipework, ensuring secure and leak-free installation.

Specifications

• Flow Range: 568 – 5,678 L/h (150 – 1500 GPH)

• Connection Size: 1" Slip PVC (via included BSPP unions)

• Sensor Threads: BSPP

• Required Components: Neptune FMM Module, Apex Controller

What’s Included

• 1x FS-100 1" Flow Sensor (BSPP-threaded)

• 2x BSPP to 1" Slip PVC Union Adapters

Note: FMM Module and Apex Controller required. Sold separately.