• ¼ DIN
  • Universal sensor input
    Amplified pH/ORP
  • UL, CSA, IEC & EN certifications


Walchem W100P Series Flow Controller has a large display with icon based programming, making setup easy. With multiple language support the Walchem W100W provides simple setup no matter where your business takes you. Universal sensor input provides flexibility; the same controller can be used with almost any type of sensor needed; conductivity (contacting and electrodeless), amplified pH/ORP, or disinfection. Two pH/ORP/ISE models available for use with non-amplified electrodes with or without a BNC connector. Four control outputs allow the controller to be used in more places than other entry level models.

Flexibility in the function of each relay

  • On/off setpoint
  • Time proportional control
  • Pulse proportional control
  • In-range or out-of-range activation
  • Timer-based activation
  • Activation based upon the state of a contact closure
  • Timed activation triggered by a water contactor or paddlewheel flow meter's accumulated total flow
  • Activate with another output
  • Alarm