Model 150 Boiler Conductivity Controller

Reliable & flexible boiler water treatment controller to control boiler water conductivity. Easy to program with an intuitive menu.

Model 150 Boiler Conductivity Controller

Model 150 Boiler Water Treatment Controller

The Lakewood Instruments Model 150 boiler conductivity controller is a reliable and time proven boiler water treatment controller that is easy to program. 

The controller provides a high level of application flexibility to match your preferences and your system’s requirements. Control boiler water conductivity with confidence. Place an order today!

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Model 150 Boiler Water Treatment Controller Overview

  • Used for conductivity control of boilers.
  • Multiple inputs and very easy setup
  • This boiler water treatment controller can be used in the Continuous Sample, Sample/Cycle, or Sample/Hold modes to control the boiler water conductivity.
  • For a complete system, order the boiler conductivity controller with the conductivity sensor, plumbing kit and motorized blowdown valve.

Experiencing Steam Flash?

Lakewood Instruments has all the expertise and plumbing required to prevent steam flash from messing up your control system. We can help you create your ideal system that doesn’t give you any trouble.

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Standard Features

  • 1 water meter input 
  • Conductivity input
  • Flow switch input 
  • 4-20 mA output

Additional Features

  • Removable power cord and receptacles for simple conduit installations.
  • Designed with a single circuit board for better reliability and lower cost.
  • Large shallow enclosure for easy wiring.
  • The enclosure is rated NEMA 4X.
  • Voltage selector switch for 115 or 230 VAC operation.
  • Illuminated graphical display allow for quick and easy programming. 
  • The display is lit by two LEDs when any key is pressed.
  • Steel domed switches improve the tactile sensing and life expectancy of the keypad.
  • Heavy-duty stainless steel domed numeric keypad.


  • Easy to program, the Model 150 Controller uses an intuitive menu and a numeric keypad for programming.
  • No add-on options. Flow switch input, 4-20mA output and three boiler conductivity control methods, Continuous Sample, Sample/Cycle and Sample/Hold are standard.
  • Single circuit board design improves reliability.
  • Multiple methods of chemical feed for application flexibility.

Product Documentation


  • Type: Model 150
  • Usage: Water treatment conductivity control
  • Includes: Optional sensor and plumbing configurations
  • Output Relays: 2 selectable use and 1 blowdown relay
  • Flow Switch: Flow switch input
  • Water Meter: 1 water meter (contact head, paddle wheel or turbine) input
  • Output Signal: 1 non-isolated powered 4-20 mA output
  • Conductivity Range: 100 – 10,000 μS
  • Ambient Temperature: 32° – 120° F (0° – 49° C)
  • Sensor Type: 2 electrode conductivity sensor
  • Conductivity Resolution: ± 10 μS
  • Accuracy & Repeatability: ± 1%
  • Deadband/Setpoint: Adjustable
  • Enclosure: NEMA 4X, ETL
  • Timer: Max. blowdown time exceeded, relay time exceeded
  • Power: 120/240 VAC 50/60 Hz
  • Relay Ratings: 3A each, 10A total

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