Walchem W900 Series Controller

The Walchem W900 Series Controller provides reliable, flexible and powerful control for your water treatment program.

Key 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 added sensors, analog inputs/outputs, and LPR corrosion sensors
• Multiple language support with simple setup
• Eight relay control outputs allow multiple applications
• Twelve digital inputs
• Wall mount package for easy install
• Ethernet or WiFi for remote access via the internet, LAN, or optional BACnet or Modbus/TCP
• Datalogging
• Emailing alarm messages, datalog, graph or system summary reports
• On-screen and web page graphing of sensor values and control output status

Complete flexibility in the function of each relay:

• On/Off
• 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 a water contractor or paddlewheel floe meter's accumalated total flow
• Activate with another output
• Activate as a percent of another output's on-time
• Alarm
• Spike Set Point
• PPM Volume
• Target PPM
• Flow Meter Ratio
• Volumetric Blending
• Disturbance Variable Control
• For Cooling Tower and Boiler applications: Biocide Timer and Boiler blowdown on conductivity using intermittent sampling