Neptune Systems

LD-3 Optical Multi-Surface Leak Sensor - Neptune Systems

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Be alerted of water spillage and take corrective action before disaster strikes

  • Optical sensor technology
  • More reliable than analog counterparts
  • Epoxy-coated and corrosion-resistant
  • Can be reused after contact with water
  • Nonreactive to metallic surfaces-- no more false alarms
  • Multiple applications-- can be placed almost anywhere
  • Weighted to stay flat
  • Connects to FMM port to communicate with Neptune Apex controllers


Neptune's LD-3 Multi-Surface Optical Leak Sensor marks a significant improvement over its analog counterpart, the LD-2 Solid Surface Leak Detection Probe. While the LD-2 utilizes conductive strips to detect fluid leaks on surfaces around your aquarium, the LD-3 takes advantage of optical sensor technology instead. This shift in sensor technology gives the LD-3 two distinct advantages over the LD-2:

  1. Reusable and resistant to corrosion. The LD-3 sensor can be reused after contact with water. Unlike the conductive strips of the LD-2 which are prone to corrosion from contact with saltwater, the LD-3's epoxy-coated optical sensors can continue to provide long-lasting leak detection after repeated contact with saltwater & with no risk of corrosion!
  2. Multi-surface applications with no false alarms. The conductive strips used on the LD-2 can sometimes give a false alarm when placed on metallic surfaces. With its optical sensor, the LD-3 can effectively be used on any surface material type, including metal and epoxied cement, without the risk of triggering false alarms.


More Information
Product Name LD-3 Optical Multi-Surface Leak Sensor - Neptune Systems
SKU 251252
Out of stock message COMING SOON
UPC 653078005004
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Product Questions

Is this compatible with the A2 controller?
Question by: Andrew Robson on Aug 2, 2022, 1:12 PM
Hey there,
Thank you for reaching out to us. Yes, this will work with the A2.

Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on Aug 2, 2022, 2:12 PM
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