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W100W Controllers


Plug into more options in water treatment control!

Three powerful control outputs make the Walchem W100W a more versatile, high value choice among entry level water treatment controllers.

The W100W series provide an economical and reliable way to keep your water treatment program under control.

Key Features

  • 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
  • Three control outputs allow the controller to be used in more places than other entry level models

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

Features of the Cooling Tower/Boiler W100W

  • Economical package with no additional cost for timer functionality
  • Optional analog (4-20 mA) output for recording, datalogging or connection to building energy management systems
  • 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 a percentage of elapsed time
    • Biocide timer with pre-bleed and post-feed bleed lockout options
    • Alarm

Features of the Conductivity, pH/ORP & Disinfection W100W

  • Three pH/ORP models available for use with amplified electrodes, non-amplified electrodes with a BNC connector or non-amplified electrodes without a connector
  • Economical wall-mount package for easy installation
  • Complete flexibility in the function of each relay
    • On/Off Setpoint
    • Time Proportional Control
    • Pulse Proportional Control (when purchased with solid-state relays)
    • 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
    • Activate as a percent of another output’s on-time
    • Alarm