NEPTUNE SYSTEMS APEX FMM OPTICAL LEVEL SENSOR V2 (OS-1) Simplicity As a return pump

As a return pump

commonly abbreviated as dKH

The Filter Sock Plate can be installed with filter socks as shown

*This vertical color changing resin in the DI cartridge removes any remaining TDS left by the membrane

The new sleek grey display module will now have a soft-glow orange back-lit LCD display with the traditional 7 button layout for easy functionality

NEPTUNE SYSTEMS APEX FMM OPTICAL LEVEL SENSOR V2 (OS-1) Simplicity As a return pumpOptical 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