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    …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 into custom brackets or through a hole in a vessel. Included are a fastening nut and silicone washer. What's Included? 1x OS-1 V2 Optical Sensor with nut and washer

    $27.95 Regular Price: $

    …type of reservoir that has up to 1/4" thick walls. Compatible with Neptune FMM Module Magnet mounts to walls up to 1/4" thick Can be mounted vertical or horizontal What's Included? 1x OS-1 V2 Optical Sensor with nut and washer 1x OS-M Optical Sensor Magnetic Mount Note: FMM Module required for use.

    $37.95 Regular Price: $

    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"…

    $39.95 Regular Price: $
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