Up for sale is a Neptune Systems 1/2" Flow Sensor (FS-50) for the Apex Fluid Metering Module (FMM).

This sensor is designed to monitor water flow rates in your aquarium plumbing system, typically used inline with return pumps, reactors, or carbon/GFO filters to transmit real-time flow data directly to your Apex controller.

• Flow Rate Range: 30 to 250 GPH (Gallons Per Hour)