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​Stephan Andree
Product Manager

SFC PC Process Controller

The Wallace & Tiernan® Systems SFC PC system controls on the basis of a controlled variable (e.g. a flow signal) and an actual value signal which can be an external mA signal.

 Thanks to the fuzzy technology, compound loop control with flow rate and access to the controlled process variable (e.g. chlorine) results in significantly improved control. The SFC PC system saves its reactions to control deviations permanently and uses this data as a basis for future control, allowing the control variables to be balanced optimally with the flow and the control parameters.



Compound loop control is ideal for disinfection control as well as the control of other chemical parameters in:

  • Potable water treatment plants
  • Cooling water circuits
  • All types of industrial/process water applications

 Benefits / Features

  • Supports up to four control modes, including process optimised, adaptive control and setpoint trim mode
  • Very precise control, preventing over or underfeed
  • Adjustable measuring range and units
  • Easy to operate thanks to intuitive menu navigation and clear, easy-to read display, diagnostics menu to simplify maintenance
  • Galvanically isolated inputs and outputs simple firmware updates using an SD card or R S 232
  • RS 485 port, CAN sensor/actuator bus interface and slot for fieldbus systems SFC PC Process Controller