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Walchem's W900 series of controllers are value-priced, high-level controllers that ensure unparalleled versatility in water treatment.

PRODUCT

Walchem Controller W900

Walchem Controller W900

(Value-priced, high-level controllers)

The versatile design of Walchem's W900 series of controllers is suitable for a range of applications in cooling towers, boilers or general water treatment. The W900 controllers offer online access over WiFi and through a BACnet, as well as through Ethernet or LAN. These controllers are easy to program and set up.

In-built with Walchem Fluent™ – a cloud-based software tool that provides real-time access to your process, alarm notifications with escalations, data graphing and storage.
Manufactured by: Walchem Corporation, USA

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      Technical Details 
  • Cell contacting conductivity: 0-300 μS/cm
  • Cell contacting conductivity: 0-3,000 μS/cm
  • Cell contacting conductivity: 0-30,000 μS/cm
  • 10.0 Cell contacting conductivity: 0-300,000 μS/cm
  • pH: -2 to 16
  • ORP: -1500 to 1500 mV
  • Disinfection sensors: -2000 to 1500 mV / 0 - 2 ppm to 0 - 20,000 ppm
  • Electrodeless conductivity: 500 to 2,000,000 uS/cm
  • Material of construction: Polycarbonate/NEMA 4X; display - 320 x 240 pixel monochrome backlit display with touch screen
  •   Applications 
  • Cooling tower biocide control
  • RO systems
  • Metal finishing and printed circuit board
  • Swimming pools and spas
  • Food and beverage disinfection
  • Portable water treatment
  • Active pharmaceutical ingredients process
  •   Key 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
  • Four I/O slots allow complete flexibility in adding additional sensors, analog inputs, and analog outputs
  • Multiple language support allows simple setup
  • Eight relay 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
  • Complete function of each relay
  • ON/OFF set point
  • Time proportional control
  • Pulse proportional control (when purchased with 4-20 mA or pulse solid state opto outputs)
  • PID control (when purchased with 4-20 mA or pulse solid state opto 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 water contactor/paddle wheel flow meter’s accumulated total flow
  • 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 blow down on conductivity using intermittent sampling
  • Ethernet for remote access via the Internet, LAN or optional Modbus/TCP
  • Data logging
  • Email alarm messages, data log reports or system summary reports
  • Helps to maintain the levels of critical parameters such as pH, ORP, Fluorescein (PTSA), and conductivity precisely
  • Universal sensor input provides extraordinary flexibility; the same controller can be used with almost any type of sensor needed

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