FS1 Series – High Sensitivity Liquid Flow Switches


Manufacturer: MCDONNELL & MILLER

For general purpose applications where high sensitivity is required and moderate or low flow rates are encountered such as air conditioning, heating and hydronic systems, water, fuel oil, some viscous liquids and oils in process work. Features include high flow capacity, in-line configuration (eliminates pipe tees) and completely sealed switch compartment.

  • Specifications
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  • 1/2″ (15mm) NPT process connection – BSPT also available
  • High flow capacity
  • Maximum operating pressure 100 psi (7 kg/cm2)
  • Sensitivity adjusting screw makes flow adjustment easy
  • Maximum temperature 225°F (107°C)
  • Minimum temperature (fluid or ambient) 32°F (0°C)
  • Switch: SPDT 125 VA at 120 or 240vac, 50 or 60 cycles snap switch – gold plated contacts available as an option