Neptune Magnetic Optical Sensor Neptune Magnetic Optical Sensor is an FMM-compatible optical wet/dry sensor with magnetic mounting for Apex water-level monitoring, ATO logic, reservoir status, and high-level or low-level alerts. Magnetic Optical Water-Level Sensor for Apex The Neptune Magnetic Optical Sensor replaces the earlier optical sensor with magnet design and offers a cleaner magnetic mounting system with improved protection against water incursion. It uses reflected infrared light to signal the Apex when the sensor changes state from wet to dry or dry to wet. Neptune Magnetic Optical Sensor Features Optical wet/dry sensor for compatible Apex FMM ports Magnetic mounting design for quick placement and cleaner installation Improved design helps prevent water incursion into the sensor Uses reflected infrared light to detect wet or dry state changes Useful for custom ATO systems, high-level sump warnings, low-level reservoir alerts, and water-storage monitoring Can also be mounted through a hole in a vessel or into custom brackets 5 metre wire length provides flexible placement around the sump, reservoir, or equipment area Includes fastening nut and silicone washer for alternate mounting applications Magnetic Optical Sensor Specifications Product type: Apex optical wet/dry level sensor Model type: MOS Connection: Neptune FMM accessory port Detection method: Reflected infrared light Mounting style: Magnetic mount or through-vessel/custom bracket installation Cable length: 5 metres Common applications: ATO control, sump high-level warning, reservoir level monitoring, and custom Apex water-level alerts Required hardware: Neptune FMM or compatible built-in FMM port Compatibility and Placement Notes This sensor requires an available FMM port or compatible built-in Apex FMM port. It is intended for water-level state detection rather than continuous depth measurement. For exact depth tracking, use a Neptune Liquid Level Sensor. For floor leak detection, use a Neptune leak sensor rather than this wet/dry level sensor. Setup Directions Mount the sensor at the desired water level using the magnetic mount, included hardware, or a suitable custom bracket. Connect it to an available FMM port, configure the input in Apex Fusion, then test wet and dry states several times before using it for ATO logic, alerts, or equipment protection routines. What's Included Neptune Magnetic Optical Sensor Fastening nut Silicone washer
