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McDonnell Miller Series FS1 High Sensitivity In-Line Liquid Flow Switches

High Sensitivity In-Line Liquid Flow Switches
Series FS1

• For general purpose applications where high sensitivity is required and moderate or low flow rates are encountered such air conditioning, heating and hydronic systems, water, fuel oil, some viscous liquids and oils in process work 
• In-line configuration eliminates need for a pipe tee

• ¹/₂” NPT
• Single pole, double throw snap switch
• Switch compartment is completely sealed to protect it from the liquid
• Sensitivity adjusting screw makes flow adjustment easy
• Optional features
  – BSPT threads
  – Gold plated contacts
• Minimum temperature (fluid or ambient) 32°F (0°C)
• Maximum temperature 225°F (107°C)
• Maximum operating pressure 100 psi (7 kg/cm²)

Select a link under the "item" tab below to order.

Cat #DescriptionsPart NumberWeight Ibs.(kg)
FS1High sensitivity flow switch -½” NPT body1132003.0 ( 1.4)
Motor Switch Rating (Amperes)
Voltage Full Load Locked Rotor Pilot Duty
120 VAC 7.4 44.4 125 VA at 120 or 240 VAC 50 or 60 cycles
240 VAC 3.7 22.2 125 VA at 120 or 240 VAC 50 or 60 cycles


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