NEPTUNE SYSTEMS APEX FMM OPTICAL LEVEL SENSOR V2 (OS-1)

Optical Level Sensor  (OS-1) This sensor plugs into your FMM and, using reflected infrared light, will 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 into custom brackets or through a hole in a vessel. Included are a fastening nut and silicone washer. The sensor has a wire length of 3 meters. These sensors are sold individually. Specifications: Cable length: 10 feet / 3m Hole size: 9/16" / 15mm  What`s Included? 1x OS-1 Optical Level Water Sensor NOTE: Neptune Systems Apex Controller and FMM Module required and sold separately.