LMI Controllers

Conductivity Controller

LIQUITRON™ DC4000 Series

The LIQUITRON™ DC4000 Series Conductivity Controller is a microprocessor based control system that will operate in a variety of water treatment applications. Designed specifically as a bleed and feed cooling tower controller or boiler controller. Comes with a variety of timer functions to control chemical addition.



pH controller

LIQUITRON™ DR5000 Series

The LIQUITRON™ DR5000 Series is a dual-channel ORP (Oxidation Reduction Potential) Controller designed for a variety of industrial ORP applications including metal finishing, water treatment, printed circuit board manufacturing, and waste treatment. The DR5000 allows independent programming of control methods (ON/OFF or Proportional) for reducing agent (Pump A) or oxidizing agent (Pump B) dosage.




Conductivity Controllers Specs

  • 0-20,000 µS control range
  • Display units in µS or in PPM/TDS
  • Temperature display in °C or °F
  • High and low alarm with output relay
  • Water meter totalizer (gallons/liters)
  • 4-20 mA recorder output (standard)
  • Flow switch compatible (N.O. or N.C.)



 pH / ORP Controllers Specs 

  • Custom Backlit LCD Display
  • High and Low Set Points
  • Limit Timers for each output
  • +/- 2000 mV Scale
  • ORP Programmable Response Delay
  • 4-20 mA Recorder Output (option)
  • Proportional pulse or relay output both standard
Blue White Pump Controllers

Conductivity Controller

LIQUITRON™ DC4500 Series

The DC4500 controller provides a set point and relay for conductivity control with a variety of timer functions to control chemical addition, including dual biocides. Pumps may be controlled in either ON/OFF or external trigger mode. Controller programming is intuitive and requires only three keys.



parts and accessories

pH Controller

LIQUITRON™ DP5000 Series

The LIQUITRON™ DP5000 Series is a dual channel pH Controller providing either relay or proportional pulse outputs to drive chemical metering pumps. A custom backlit display provides constant information regarding controller conditions with convenient easy to use navigation. High and low alarm points, delay and limit timers, and other programmable features make the DP5000 the most adaptive pH controller available for your chemical feed system.