FS-4 Series Piston Flow Switch

• Flow Rate Settings: 0.1 GPM to 1.5 GPM
• Port Size: 9/16" - 18 UNF
• Primary Construction Material: Ryton
• Setting Type: Fixed
• More robust porting hubs offer better structural integrity
• Molded cable grommet offers improved moisture protection

FS-4 Series Flow Switches make flow protection economical for a broad range of industrial applications such as welders, lubrication systems, medical sterilizers and laundry chemicals dispensing. Applications include: Electronic Equipment (Laser Heads, Welders, Power Supplies, High Speed Spindles, X-Ray Tubes, Semiconductor Equipment), Bearings or Gears (Presses, Rotating Equipment, Conveyors, Machine Tools, Robotics), Processing & Dispensing Equipment (Water Purifications and Filtering, X-Ray Film Processing, Beverage Dispensing, Chemical Additives, Gas Sampling, Distilling).

Product Line

• Flow Sensors & Switches

Sensor Type

• Piston

Body Material

• Ryton

Wetted Material

• 316 Stainless Steel
• Viton
• Ryton
• Epoxy

Maximum Operating Pressure

• 250 PSI

Flow Setting Range

• FIXED

Set Point Accuracy

• ±15%

Set Point Differential

• 0.2

Switch Type

• SPDT, 20VA (240 VAC max)
• SPST, N.O. (20VA)
• SPST, N.C. (20VA)

Process Connection

• 9/16"-18 UNF-2B

Electrical Termination

• 36" Long, 18 AWG, Zip Cord
• 24" Long, 18 AWG, Zip Cord

Maximum Flow Rate

• 1.5 GPM

Maximum Setpoint Differential ±

• 20 %

Minimum Flow Rate

• 0.1 GPM
• O-Ring Material
• Viton®

Wetted Materials- Other

• Epoxy

Recommended Filtration

• 50 Micron

Flow Setting Type

• Fixed

Wetted Materials- Spring

• 316 Stainless Steel

Switch Operation

• Normally Open

Switch Output

• S.P.S.T

Switch Ratings Range

• 20 amps

Flow Range

• 0.1

Ingress Protection Rating

• IP00

Product Family

• Flow Switch

Product Type

• Piston

Maximum Operating Temperature [°F]

• 225 °F