The FES Series Flow Switch is designed to detect liquid Flow or Low / No Flow. The FES switch encompasses a SPST contact that can be wired to energize a device when liquid flow either exceeds or drops below the set flow rate.

The FES Series is an excellent choice for corrosive liquid services, water treatment, waste treatment, liquid pumping and process control systems.

The FES Flow Switch can control devices such as pumps, motorized valves and alarm devices.

  • Excellent Pump Protection
  • Corrosion Resistant
  • All Plastic Rugged Design


  • All Plastic Construction
  • In-Line Design / Insertion Style
  • NEMA 4X Enclosure
  • Corrosion Resistant PP Body / Paddle ½” – 8″ Pipe / Tee / Saddle
  • Heavy Duty Rugged Design
  • Excellent Chemical Resistance
  • Easy to Install
  • Can be Easily Changed from Normally Open to Normally Closed


Body + Thread Paddle Assembly     PP
Installation Fitting                              PP / PVC (Optional)
O-Ring                                                  Viton®
Max. Working Pressure                     150 psi / 10 bar
Max. Working Temperature             PP 80°C (NON SHOCK)
Max. Contact Current                        1.5A Max.
Power Supply                                      200VDC / 250VAC
Max. Power                                         50W
Contact                                                NO / NC Adjustable
Electrical Connections                     DIN 43650A (ISO 4400) socket Opt. Cable Output Socket with
Protection Class                                IP65 / NEMA 4X