Lakewood 140 Cooling Tower Controller, choose add on options from dropdown list

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The control of the water treatment in a cooling tower should be simple. The key parameter to control is the concentration of dissolved solids, which we do through the control of the water conductivity. The Lakewood model 140 is a simple as that. SImplicity drives reliability and ease of operation. Connect a water meter and now you can feed the chemicals based on water flow. Blowdown valve, water meter, flow switch, conductivity sensor, and pumps are sold separately.

The  US Dept. of Energy indicates:

"Install a conductivity controller to automatically control blowdown. Work with a water treatment specialist to determine the maximum cycles of concentration the cooling tower system can safely achieve and the resulting conductivity (typically measured as micro Siemens per centimeter, µS/cm). A conductivity controller can continuously measure the conductivity of the cooling tower water and discharge water only when the conductivity set point is exceeded. "

Mobile users please click on "VIEW FULL PRODUCT PAGE WITH DESCRIPTION"  to select the required option.

1239594 - Cooling Tower Water Treatment Controller Only. (No Sensor or Plumbing).

1239595 - Cooling Tower Water Treatment Controller, Including Sensor Tee and Conductivity Sensor.

1239596 - Cooling Tower Water Treatment Controller, Including Left Exit Flow Switch Plumbing and Conductivity Sensor.

1269226 - Cooling Tower Water Treatment Controller, Including Right Exit Flow Switch Plumbing and Conductivity Sensor.

1239597 - Cooling Tower Water Treatment Controller, Including Left Exit Flow Switch Plumbing and Conductivity Sensor on a Mounting Plate (12 X 21).

1269418 - Cooling Tower Water Treatment Controller, Including Right Exit Flow Switch Plumbing and Conductivity Sensor on a Mounting Plate (12 X 21).

  • Use this Controller for cooling towers.
  • Removable power cord and receptacles for simple conduit installations.
  • Scheduled feed, which can use two relays for biocides or other chemicals.
  • One (1) water meter input, conductivity input, flow switch input, and 4-20 mA output are all standard features.
  • Designed with a single circuit board for better reliability and lower cost.
  • Large open shallow enclosure for easy wiring.
  • The enclosure is rated NEMA 4X.
  • Power selector switch for 115 or 230 vac operation.
  • Heavy-duty stainless steel domed numeric keypad and illuminated graphical display allow for quick and

easy programming. Steel domed switches improve the tactile sensing and life expectancy of the keypad.

  • LED indicators for power, alarm and relay status.


  • Easy to program with the Lakewood plain English, intuitive, and user friendly menu interface.
  • Single circuit board design improves reliability.
  • No add-on options. 4-20 mA output and biocide features are standard.
  • Multiple methods of chemical feed for application flexibility.


Conductivity range 0-10,000 μS Output Signal One 4 – 20 mA, isolated or

Conductivity sensor 2 electrode non-isolated optionally

Conductivity Resolution ± 10 μS powered

Temperature comp. 500 ohm NTC Output relays 2 selectable use, 1 blowdown

Accuracy & repeatability ± 1.0% Relay ratings 3A each, 10A total

Deadband/Setpoint Adjustable Power 120/240 VAC 50/60 Hz

Auto/Manual outputs Menu selectable Ambient 32° - 120°F (0 - 49°C)

Keypad 16 tactile push-buttons Enclosure N E M A 4X, ETL

Display 16 X 2 Character

Water meter input Contact head, paddle wheel

or turbine Sensors/Plumbing Cooling Tower

Timer Max. blowdown time exceeded, Max Pressure 140 psi (9.65 bar)@ 100 °F

relay time exceeded Max Temp 140°F (60°C)

Min flow 1 gpm (3.785 Lpm)

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Ross G.
United States United States
Easy to install and start

We have used Lakewood Instruments in the past. The units are very reliable so we only had to replace previous unit after 20 years of service. The new unit was simple to install and easy to configure.