McDonnell & Miller FS4-3 Flow Switch

This Flow Switch from McDonnell has a 1" NPT connection with two electrical knock-outs which allows connection from either end. There is sensitivity adjusting screw that make flow adjustment easy along with a single pole, double throw snap switch and hardened stainless steel bearings minimizing friction. Sealed Monel bellows along with four stainless steel paddles included -1", 2", 3" & 6" (25, 50, 80, & 150mm). There is a time delay (5 or 20 seconds)– Two SPDT switches to make or break two separate circuits. Consists of BSPT threads having a maximum temperature 300 Deg. F (149 Deg. C) and a maximum pressure 160 psi (11.3 kg/cm2).