W900 Controllers

The Next Generation of Powerful Control. Connect with the Walchem W900 Series controllers and enjoy unparalleled versatility in maintaining your water treatment options. Get more power over your water treatment processes by connecting with your Walchem representative today.

  • Standard Features:

    Summary of Key Benefits:

    Large touchscreen display with icon based programming

    Universal sensor input provides extraordinary flexibility

    Four I/O slots allow complete flexibility

    Multiple language support allows simple setup

    Eight replay control outputs

    Economical wall-mount package for easy installation

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


    Complete flexibility in the function of each relay:

    • On/Off Setpoint

    • Time Proportional Control

    • Pulse Proportional Control

    • Flow Proportional Control

    • PID control

    • 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 Water Contactor / Paddlewheel

    • Activate with another output

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

    • Alarm

    • Spike Set Point

    • PPM Volume

    • Target PPM

    • For Cooling Tower and Boiler applications:

           • Biocide Timer

           • Boiler blowdown on conductivity using intermittent sampling


    Email Alarm messages, Datalog reports / System Summary reports

    Ethernet option for remote access via the Internet, LAN or oprtional Modbus/TCP


  • Literature

  • Standard Installation Diagrams

    Coming Soon

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