The Neptune Optical Sensor is a crucial component for advanced reef aquarium monitoring and automation. This sophisticated sensor plugs directly into your Neptune Systems FMM module and utilizes reflected infrared light to precisely detect changes in water level. It seamlessly communicates these state changes, from wet to dry or dry to wet, to your Apex controller, enabling intelligent responses and alerts within your system.

Designed for versatility, this sensor can be effectively integrated into various applications, including the construction of a custom auto-top-off (ATO) system, serving as a reliable high-level warning in your sump, or accurately monitoring water storage levels. Each sensor is sold individually and comes complete with a fastening nut and a silicone washer, facilitating secure mounting into custom brackets or directly through a pre-drilled hole in your vessel.

This optical sensor is an indispensable tool for reef hobbyists seeking to enhance their tank's automation and safety through the Neptune Apex ecosystem. It provides a precise and dependable method for critical water level management, empowering users to create tailored solutions for their specific aquarium needs. Whether for preventing overflows or ensuring consistent water replenishment, this sensor offers peace of mind and robust control.