Starting at $67.00
  • Usually ships in 2-3 weeks



  • Low Pressure Drop Design
  • 0.25 to 2.00 GPM (fixed) flow rate settings
  • 3/8in NPT Male and 1/4in Quick Disconnect port size
  • Glass Reinforced Polypropylene
  • 125 PSI @ 70°F; 50 PSI @ 212°F operating pressure
  • 0 to 212°F operating temperature
  • 20% of set point accuracy
  • 20% maximum set point differential
  • Switch: SPST, 10VA, N.O. at no Flow
  • 24 inch polymeric Leads (22 AWG) electrical termination
  • CUL Approval


The Gems FS-380P series is a rugged, dependable flow switch that offers superior performance at an economical price. It is recommended that you use a 100 micron filter to prevent clogging. The FS-380P is an ideal choice for coolant applications requiring reliable flow detection in HVAC, semiconductor, welding, medical and other industries.

The FS-380P series is available with 3/8" NPT male or 1/4" quick disconnect male fittings. The quick disconnect fitting has a host of snap-on mating fittings sold separately to fit most piping requirements. The FS-380P has flow setting ranging from 0.07 to 2.00 gpm. The simple and reliable design is suitable for operating temperatures from 0 to 212°F and line pressures up to 125 psig.

Applications for the Gems FS-380P Series flow switch:

  • 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


This product can be used in the following applications: