W600 Controller

Walchem integrates its advanced sensing, instrumentation, fluid pumping and communications technologies to deliver reliable and innovative solutions to the global water treatment market. To complete your system, Walchem provides high quality accessories that are required for cooling tower, boiler, potable water, and wastewater applications. All Walchem's accessories are carefully designed and selected for compatibility with our pumps and controllers to enable our customers to provide a complete system solution. Our in-house engineering is driven by quality, technology and innovation.


  • Standard Features:

    Large touchscreen display with icon based programming makes setup easy


    Universal sensor input provides extraordinary flexibility; the same controller can be used with almost any type of sensor needed


    Combination Sensor Input and Analog Input board that add even more flexibility


    Lead/Lag control of up to 6 relays


    Optional dual analog (4-20 mA) input for Fluorometers or nearly any other process value


    Multiple language support allows simple setup no matter where your business takes you


    Six control outputs allow the controller to be used in more applications


    Economical wall-mount package for easy installation


    On-screen and web page graphing of sensor values and control output status


    Two Virtual Inputs that are calculated from two real inputs (cycles of concentration, % rejection, etc.)


    Complete flexibility in the function of each relay

    • On/Off Setpoint

    • Time Proportional Control

    • Pulse Proportional Control (when purchased with 4-20mA or pulse solid state op to outputs)

    • PID Control (when purchased with 4-20mA or pulse solid state op to outputs)

    • In-Range or Out-of-Range activation

    • Probe wash

    • 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

    • Activate as a percent of another output’s on-time

    • Alarm

    • Spike Set Point

    • For Cooling Tower and Boiler applications:

    • Biocide Timer

    • Boiler blowdown on conductivity using intermittent sampling


    Datalogging Emailing Alarm messages, Datalog reports or

    System Summary reports Ethernet option for remote access via the Internet, LAN or Modbus/TCP

  • Typical Applications

    Wastewater neutralization & disinfection

    Food and Beverage disinfection

    Potable water treatment

    Swimming pools & spas

    Boiler water treatment control

    Cooling tower biocide control

    Metal finishing & printed circuit board

    Irrigation & fertigation

    RO Systems

    Condensate water treatment control


  • Literature

  • Standard Installation Diagrams


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