Walchem W900 Series

Connect with the Walchem W900 Series controllers and enjoy unparalleled versatility in maintaining your water treatment options.

Features & Benefits

• 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 Setpoint
• Time Proportional Control
• Pulse Proportional Control (when purchased with 4-20 mA or pulse solid state opto outputs)
• Flow 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 / 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
• PPM Volume
• Target PPM
• For Cooling Tower and Boiler applications:
  – Biocide Timer
  – Boiler blowdown on conductivity using intermittent sampling
• Ethernet for remote access via the Internet, LAN or optional Modbus/TCP
• Datalogging
• Email Alarm messages, Datalog reports or System Summary reports