The FS range of flow switches utilises the flow of liquid within a pipe to move the switch's paddle and operate a reed contact. The paddle is manufactured in teflon and stainless steel and can withstand a pressure of 355 PSIG. The paddle is marked in 1/2in. increments which enables the length to be cut to suit a wide range of volumes from 5 to 22 GPM. The switch is fitted to the diameter of the pipe using the 1in. PT thread. With a high flow, shock and vibration rating, and explosive proof (FS70 model)the switch is suitable in a wide range of environments and liquids.