FS-10798 is an externally adjustable flow switch, suitable for applications that involve oils, water and even gases. The advantages of this device include the adjustable settings, and the flow rate can be set between 0.5 GPM and 20.0 GPM.In terms of port size, this is 1/2″ NPT, while the materials used are stainless steel and brass, making the item more durable. The setting type is completely adjustable.