Mcdonnell & Miller FS4-3DS, 1" Flow Switch w/Stainless Steel Body and 2 SPDT switches

Universal design serves the widest variety of applications. For starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering devices and others Features Replacement for common flow switches from Johnson/Penn, Potter/Taco, Watts, Hydrolevel and other manufacturers 1" NPT Two electrical knock-outs allows connection from either end Sensitivity adjusting screw makes flow adjustment easy Single pole, double throw snap switch Hardened stainless steel bearings minimize friction Sealed Monel bellows Four stainless steel paddles included - 1", 2", 3" & 6" (25, 50, 80, & 150mm) Optional features Time delay (5 or 20 seconds)– Two SPDT switches to make or break two separate circuits Reinforced paddles Materials of construction suitable for corrosive liquids Fire sprinkler service - Model FS4-3F only BSPT threads Maximum temperature 300 Deg. F (149 Deg. C) Maximum pressure 160 psi (11.3 kg/cm2)