Neptune Systems LD-3 Leak Sensor – Optical Multi-Surface Sensor for APEX

🧪 Product Overview

The Neptune Systems LD-3 Leak Sensor is a compact and highly sensitive optical sensor designed to detect water leaks on a wide range of surfaces. Engineered for use with the FMM (Fluid Monitoring Module) and Neptune APEX controllers, this sensor instantly alerts you to moisture presence—protecting your home and aquarium from costly water damage. Its optical technology makes it more reliable and versatile than traditional conductivity-based sensors.

✨ Key Features and Benefits

• Advanced Optical Detection – Reacts quickly to the presence of water
• Multi-Surface Capability – Works on wood, tile, concrete, carpet, and more
• Low-Profile Design – Easily fits into tight spaces around sumps and tanks
• APEX & FMM Compatible – Integrates seamlessly with Neptune Systems
• Instant Alerts – Sends real-time leak notifications to your APEX dashboard or phone

📦 What’s Included

• 1x Neptune Systems LD-3 Optical Leak Sensor
• Integrated cable for FMM module
• Quick-start setup guide

🛠️ How to Use

1. Plug the LD-3 sensor into your FMM module

2. Place the sensor flat on a surface where leaks may occur (under sump, behind tank, etc.)

3. Set up alarms or automation rules via APEX Fusion

4. Regularly inspect and wipe sensor clean of salt creep or debris

5. Replace if physical damage or corrosion occurs

📐 Specifications

• Type: Optical water leak sensor
• Compatibility: Neptune APEX and FMM module
• Surface Support: Wood, tile, concrete, carpet, vinyl
• Cord Length: Approx. 5 ft
• Application: Aquarium leak detection and home protection

✅ Conclusion

The Neptune Systems LD-3 Leak Sensor provides fast, reliable detection of water leaks on any surface. With optical technology, low-profile form, and APEX integration, it's an essential safeguard for serious reef aquarists.