Water Treatment Controllers
Cooling Tower and Boiler/Condensate Water Controllers are used across a wide range of process applications across the globe. Whether you are looking for an economical and reliable way to keep your cooling tower, boiler, or condensate water treatment program to a more sophisticated program requiring more I/O, control algorithms, and remote data access. Walchem has a controller to meet your needs.
Combine these with a broad array of high quality, reliable sensors and diaphragm metering pumps to maintain your systems’ operation. Walchem provides you with state-of-the-art control and remote communication capabilities giving you the instrumentation to apply your water treatment chemistries for top performance.
- W100W Series: The controller features one sensor input and three control outputs. It is offered in an economical wall mount design. This entry level water treatment controller helps keep your water treatment program under control.
- Intuition-6™: These controllers feature up to 4 inputs and 6 relay outputs. The universal sensor input is capable of using contacting conductivity, electrodeless conductivity, pH, ORP or disinfection sensor types. Optionally select a dual analog input board or a combination sensor/analog input board.
- Intuition – 9™: These controllers feature up to 24 sensor inputs and 12 relay outputs, and has four I/O slots that allow flexibility in adding analog outputs, sensors, and linear polarization resistance (LPR) corrosion sensors.
- Wide range of sensors for use in cooling tower and boiler/condensate applications
- IX- and E-Series metering pumps for all chemical feed.
Controllers

Intuition-9
24 Inputs / 12 OutputsIntuition-9
Up to 24 inputs
Up to 12 outputs
Remote Communication

Intuition-6
4 Inputs / 6 OutputsIntuition-6
Up to 4 inputs
6 outputs
Remote Communication

W100W Series
1 Input / 3 OutputsW100W Series
1 Sensor Input
3 Control Outputs
Economical Wall Mount Design
Cooling Tower & Boiler/Condensate Water Sensors

Cooling Tower CCond
Contacting ConductivityCooling Tower CCond
Cooling Tower
Boiler Water and
Condensate Reject Conductivity

Cooling Tower ECond
Electrodeless ConductivityCooling Tower ECond
Cooling Tower
Boiler Water and
Condensate Reject Conductivity

Condensate CCond
Boiler WaterCondensate CCond
Boiler Water
WEL & WDS Series pH/ORP Sensors

WEL Series pH/ORP
ElectrodesWEL Series pH/ORP
Differential pH/ORP Electrodes
Long Lasting and
Reliable Performance.

WDS Series
Differential pH/ORPWDS Series pH/ORP
Differential pH and ORP
Electrodes for Long-Lasting
and Reliable and Performance.
Disinfection Sensors

Stabilized Bromine
Amperometric DisinfectionStabilized Bromine
Membrane Sensor
No Costly Reagents
Continuous Measurement Technique

Membrane Sensors
Amperometric DisinfectionMembrane Sensors
Membrane Style

Non-Membrane Sensors
High TemperatureNon-Membrane Sensors
Non-Membrane
Higher Temps and
Pressure Applications

Pyxis ST-765SS
Non-MembranePyxis ST-765SS
Non-Membrane
Stainless Steel
Other Cooling Tower Sensors

LPR Corrosion Sensor
Dual Corrosion Sensor InputWalchem Linear Polarization Resistance (LPR)
Dual Corrosion Sensor Input
Fluorometers

Little Dipper 2
Inline FluorometerLittle Dipper 2
Inline Fluorometer

Pyxis ST-500
Inline FluorometerPyxis ST-500
Inline Fluorometer
For PTSA or Fluorometers

Pyxis ST-500W
Polymer & FluoresceinPyxis ST-500W
Fluorescent Polymers
PTSA & Fluorescent Polymer
Halogen Stable Triazole (HST)
Metering Pumps

EZ Series
Outputs to 6.3 GPHEZ Series
Simple Microprocessor Control
Outputs to 6.3 GPH

EJ Series
Outputs 3.2 GPH -75 PSIEJ Series
Simple On/Off -1:1
-3.2 GPH & 75 PSI

EWN Series
Outputs 6.7 GPH -175 PSIEWN Series
1800:1 Turndown
6.7 GPH – 175 PSI

EHE Series
Pumps up to 20 GPHEHE Series
Pumps up to 20 GPH
Capabilities to 150 PSI
Turndown Ratio of 1800:1

IX Series
Diaphragm PumpIX Series
Digitally Controlled
Direct Drive
Diaphragm Pump
With High Outputs
Cooling Tower & Boiler/Condensate Water Accessories

Flow Meters-Inline
Flow Rates 0.22-132 GPMFlow Meters-Inline
Built-In Flow Stabilizer
Flow Rates – 0.22 to132 GPM

Motorized Ball Valve
Torque of 150 in-lbsMotorized Ball Valve
Non-Reversing Motor

Flow Control Valve
Four-V Port Globe ValvesFlow Control Valve
Micrometer Dial and Pointer
Set within 1/100th of a
Turn of the Handwheel

Flow Meter
PaddlewheelFlow Meters- Paddlewheel
Impeller-Type
Sizes From ½” to 6″

Calibration Columns
Verify Pump OutputCalibration Columns
Verify Pump Output
Graduations in Milliliters and GPH

Multi-Function Valves
Increase AccuracyMulti-Function Valves
Increase Accuracy and Repeatability

Preamps
Up to 1000 FeetPreamps
Up to 1000 Feet (305) Meter
pH/ORP/ISE Electrode
Published Literature
- “Utilizing Fluorescence Monitoring to Improve Control of your Cooling Tower Chemistry,” Association of Water Treaters, Lori McPherson, September 27, 2018
- “Understanding Options for Your Analytical Sensors,” AWT Annual Conference, San Diego, CA, Lori McPherson, September 10, 2016
- “Three Ways to Control Chlorine Injection,” Process Cooling & Equipment, Lori McPherson, September 1, 2004.
- “Understanding Oxidation Reduction Potential (ORP) Systems,” The Analyst – The Voice of the Water Treatment Industry, Lori McPherson, September 1, 2002
- “Automatic Temperature Compensation for your Boiler Controller,” The Analyst – The Voice of the Water Treatment Industry, Lori McPherson, September 1, 2000