Neptune MOS Magnetic Optical Sensor
The Neptune MOS Magnetic Optical Sensor offers advanced water level monitoring with a modern, compact design. Fully waterproof and encased in silicone, it features a strong magnetic mount suitable for glass or acrylic up to 1/2" thick. Its updated form factor fits into tight spaces, preventing water incursion and ensuring precise, reliable performance. Easily connectable to an Apex FMM port, the MOS uses infrared light to detect wet or dry states, making it perfect for custom ATO systems, high-level sump warnings, or water storage monitoring. Ideal for aquarists seeking accurate, hassle-free water level control in any aquarium setup.
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Neptune MOS Magnetic Optical Sensor
Modern & compact magnetic water level monitoring
- Improved look, feel, and design
- Precise water level control
- Built-in magnetic mount
- Silicone-encased external magnet
- Completely waterproof
- Compact form factor fits into tight spaces
- Strong magnetic mount suitable for glass or acrylic up to 1/2" thick
The Neptune MOS replaces the previous OS-1-M and features an updated design that fits into tighter spaces and helps to prevent water incursion into the sensor. The MOS plugs into an Apex FMM port and uses reflected infrared light to signal your Apex when it changes state from being wet to dry or dry to wet. This sensor can be used for constructing your own ATO (auto-top-off), as a high-level warning sensor in your sump, water storage level sensor, and much more. The sensors can be mounted on any type of reservoir that has up to 1/4" thick walls.