McDonnell & Miller Series 250 General Purpose Liquid Flow 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
• Replacement for common flow switches from Johnson/Penn, Potter/Taco, Watts, Hydrolevel and other manufacturers
• 1″ NPTM Pipe Connection
• Sensitivity adjusting screw makes flow adjustment easy
• Single pole, double throw snap switch
• EPDM O-ring sealed
• Four stainless steel paddles included – 1″, 2″, 3″ and 6″ (25, 50, 80 and 150mm)
• Minimum temperature (fluid or ambient) 32°F (0°C)
• Maximum temperature 225°F (107°C)
• Maximum operating pressure 160 psi (11.3 kg/cm2)
• Models:
FS251 – NEMA1 enclosure
FS254 – NEMA4 enclosure