Neptune Systems 1″ Flow Sensor

Neptune Systems 1" Flow Sensor – Neptune Systems Flow Sensor for precise Aquarium Flow Sensor monitoring

The Neptune Systems 1" Flow Sensor delivers real-time flow data to Apex for confident pump tuning and safeguard alerts. It pairs naturally with Neptune Systems hardware and fits within Automate & Monitor setups used on most return lines.

Neptune Systems 1" Flow Sensor integration with Controllers and Flood Control & Leak Sensors

Place this Neptune Systems Flow Sensor under Controllers for instant visibility and logging. Then, combine it with Flood Control & Leak Sensors to catch clogs, valve shifts, or failing pumps before problems spread.

Highlights of the Neptune Systems 1" Flow Sensor

• Measures 150–1500 GPH on standard 1" slip PVC

• Installs inline and reports through the FMM to Apex

• Includes unions that adapt BSPP threads to 1" slip PVC

• Confirms return pump output and valve adjustments

• Helps identify obstructions, air entrainment, or output drift

Quick installation for the Aquarium Flow Sensor

• Dry-fit the unions, then solvent-weld the 1" slip sides

• Align the arrow with the flow direction and keep the body level

• Plug the sensor lead into an FMM port on Apex

• Calibrate in Apex, then set alert thresholds for low flow

Ideal practices for stable readings

• Keep 6–10 inches of straight pipe before the sensor

• Bleed microbubbles at startup to reduce fluctuation

• Recheck unions after the first warm cycle

• Log a baseline to spot changes over time

Where the Neptune Systems 1" Flow Sensor excels

• Return lines on midsize systems

• Manifold branches feeding reactors or UV

• Troubleshooting inconsistent skimmer or chiller throughput

• Verifying post-maintenance performance

Specifications for the Neptune Systems 1" Flow Sensor

• Pipe size: 1" slip PVC (via included unions)

• Flow range: 150–1500 GPH

• Sensor thread: BSPP (adapted by unions)

• Interface: FMM input to Apex

• Orientation: Inline, arrow matching flow direction

What’s included

• 1× Neptune Systems 1" Flow Sensor

• 2× BSPP-to-1" Slip Unions

Commonly  about the Neptune Systems 1" Flow Sensor

Do I need an Apex FMM to use it?
Yes. The sensor reports through an FMM port to your Apex.

Will it restrict flow on a 1" return?
Restriction is minimal when installed on full 1" plumbing.

Can I mount it horizontally?
Yes. Keep the body level and align the arrow with the flow.

How much straight pipe should I leave before the sensor?
Aim for 6–10 inches for best stability.

Can I use it on flexible hose?
Transition to hard 1" PVC, install the sensor, then return to hose if needed.

Why do readings bounce at startup?
Air and microbubbles can cause swings. Purge air and stabilize valves after priming.

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