Neptune Liquid Level Sensor 15"

Reliable Water Depth Monitoring for Sumps & ATO Reservoirs

The Neptune Liquid Level Sensor (LLS-15) offers precise and continuous water depth measurement for your aquarium's return pump section, ATO reservoirs, and dosing containers. Monitor levels live through your Apex Fusion app and get ahead of salinity swings or equipment failures before they happen.

Key Features & Benefits

• Measures liquid levels in inches or centimeters

• Ideal for return pump chambers, ATO reservoirs, and dosing containers

• Monitor levels remotely via Apex Fusion

• Patented resistive sensing for high accuracy and reliability

• Includes mounting clip for secure sump or reservoir installation

• Compatible with A2 Apex (with FMM) and A3 Apex controllers

• 3-meter cable length for flexible placement

How It Works

Liquid surrounds the sensor’s patented sensing material within its protective sheath. As water contacts the sensor, it precisely reads the depth and reports it to your Apex system for on-demand tracking via the Fusion dashboard.

Installation & Compatibility

Mount the 15” sensor to your sump, ATO reservoir, or additive container using the included clip. Perfect for medium-to-large aquariums and systems requiring consistent, reliable water level tracking.

Compatibility:
✔️ A2 Apex (with FMM module)
✔️ A3 Apex (via FMM ports)

Not compatible with A1 Apex Classic systems.

Best Uses

• Track the water level in your return pump section

• Monitor your ATO reservoir for evaporation rates

• Prevent salinity fluctuations caused by low water levels

• Confirm additive volumes in larger dosing containers

Sensor Responsiveness & Accuracy

• Reacts to changes at ~15 seconds per inch

• Accurate to ~0.2 inches post-calibration
  Not suitable for direct ATO switch control