FS-200 General Purpose Straight-Through Flow Switch

November 01, 2019





The FS-200 Series offers accurate flow detection, with 1% repeatability, over a broad range of flow settings and port sizes. Its durable construction delivers long-life reliability in either water or oil. Generous flow paths keep pressure drop low. These switches are ideal for detection of improper flow rates in high volume lubrication, cooling or process systems.

FS-200 Adjustable Series switches offer the same accuracy and are as rugged as those with fixed settings, but provide one additional feature: external adjustability. With these versatile switches your choice of flow settings is diverse within a given range. An ordinary, flat-blade screwdriver is all that’s required for the actuation adjustment.

Out of stock



  • Housing: FS-200 Bronze or 316 Stainless Steel; FS-200 Adjustable Bronze
  • Shuttle: Teflon®
  • Bonnet Bronze or Stainless Steel
  • Spring 316 Stainless Steel
  • Other Wetted Parts Viton®, Ceramic
  • Port Size: 1½ NPT to 2½ NPT
  • Maximum Operating Pressure: 400 PSIG @ 100°F (37.8°C)
  • Proof Pressure: 800 PSIG @ 100°F (37.8°C)
  • Operating Temperature: -20°F to + 300°F (-29°C to + 148.9°C)
  • Flow Rate Settings: Fixed: 0.5 GPM to 100.0 GPM
  • Adjustable: 1.0 GPM to 15.0 GPM
  • Set Point Accuracy: ± 10%
  • Set Point Differential 15% Maximum
  • Setting Type: Fixed or Adjustable
  • Switch: SPDT, 20 VA
  • Repeatability: 1% Maximum Deviation
  • Electrical Termination: No. 18 AWG, 24” L., Polymeric Lead Wires


FS-200 Series Flow Switches are U.L. Approved for Class I, Division 2, Groups A, B, C, D hazardous areas.