Neptune Systems V2 FMM Optical Level Sensor (OS-1) - Neptune Systems $27.95 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... Add to Cart
Neptune Systems Apex FMM Solenoid Valve (SV-1) - Neptune Systems $31.95 This 24VDC powered, normally-closed (NC), solenoid valve has push-fit tubing input and outputs designed for standard 1/4″ tubing. The electrical connection on this solenoid valve fits the DC24 accessory ports found on the FMM, 1Link, and Energy Bar... Add to Cart
Neptune Systems Apex FMM Flow Sensor – 1/4″ (FS-25) RODI - Neptune Systems $20.95 Usually used with aquarium accessories like RODI inputs, calcium reactor feed lines etc., this flow sensor can be placed in line with the flow on 1/4″ tubing, connected to the FMM, and communicate to your Apex the flow rate of water... Add to Cart