FS-150 series, low pressure drop, straight-through flow switch structure Brand: Gems Model: FS-150 Operating voltage: 125/250 (V) Overload current: 10 (A) Certification: CE flow settings: Liquid: 0.5GPM to 5GPM Interface: 1/2 "NPT Primary Construction Material: Polypropylene Setting Type: Fixed These slim-line flow switch will drop to a minimum. This switch has a unique dual piston diameter and the inner diameter of the structure, thereby reducing the flow resistance, the liquid can be smoothly and almost no voltage drop from flowing around the piston, leading to the downstream.