I9,CT,8 Powered,Pigtails,PC,4 SI, 6AI,Dual Corrosi


Product Type: Controllers

Item Type: W900

Brand: Walchem

Enjoy unparalleled versatility and a collection of sensors and powerful built-in algorithms for control of chemical metering pumps and valves in a broad range of water treatment applications.

Many configurations are available. Contact us to learn which model is right for you based on your application. The I9 controller with 8 powered relays (115 VAC), dual-sensor input card and conductivity sensor.

Walchem is a leading manufacturer of all things related to water treatment systems and solutions. They provide innovative solutions for a broad range of applications and offer high-quality products We have a great selection of water treatment controllers to choose from to help with all of your water treatment needs. Walchem water controllers are easy to use and come with advanced programming to help with specific requirements. Contact us at 817-251-7184 with questions.


  • Large 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

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

  • The third control relay allows the controller to be used in more places than other entry-level products

  • Economical package with no additional cost for timer functionality

  • Complete flexibility in the function of each relay:

    • Bleed on conductivity

    • Bleed time proportional to makeup water volume

    • Boiler Blowdown on conductivity using intermittent sampling

    • Feed in proportion to bleed time

    • Feed time proportional to makeup water volume

    • Feed as percentage of elapsed time

    • Biocide time with pre-bleed and post-feed bleed lockout options

    • Alarm

  • Optional analog (4-20 mA) output for recording, datalogging or connection to building energy management systems

  • Industry:
    Aquaculture, Chemical, Clinical/Medical Lab, Drinking Water, Fertigation, Food & Beverage, Oil & Gas, Petroleum, Storm Water, Waste Water, Hospitality, Agriculture

Product Documentation


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