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  • +/- 2000 mV Scale
  • High and low set points
  • Proportional pulse or relay outputs standard
  • Limit timer: adjustable from 0 to 11 hours
  • ORP programmable response delay
  • 4-20 mA output optional
  • Backlit LCD display


The LMI Pumps Liquitron DR5000 Series ORP controller is a dual-channel controller designed for a variety of industrial applications including metal finishing, water treatment, printed circuit board manufacturing, and waste treatment.

The DR5000 is a microprocessor-based ORP controller with a backlit customized display and keypad for ease of programming. The DR5000 allows independent programming of control methods (ON/OFF or Proportional) for reducing agent (Pump A) or oxidizing agent (Pump B) dosage.

The Liquitron DR5000 Series features high and low alarm points, delay and limit timers, and other programmable features that make the DR5000 an adaptive ORP controller for industrial applications.


This product can be used in the following applications: