NORTHEAST PUMP & INSTRUMENT

(800) 378-1500
190 Summer St. Lunenburg, MA 01462
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The Building Blocks for Water Treatment Equipment

“Everything but the Chemicals”

Northeast Pump and Instrument (NPI) specializes in the design, sale, installation and repair of chemical feed equipment, systems and instrumentation for water and wastewater treatment. Our involvement in the industry spans more than 30 years and our technical staff boasts over 100 years of combined industry experience.

 

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Conductivity Controllers

DC4500 Series
dc4500 series controller

  • 0 - 20,000 µS range
  • Dual biocide control
  • Inhibitor feed control [multiple control methods]
  • Cooling tower / boiler control modes
  • Solenoid or motorized valve control
  • Open- / closed-loop system programming
  • 4 - 20 mA output [programmable]
  • Built-in equipment test circuits
  • Series DC4500 Data Sheet

DC4000 Series
dc4000 series conductivity controller

  • 0 - 10,000 µS range
  • Inhibitor feed control [multiple control methods]
  • Cooling tower / boiler control modes
  • Solenoid or motorized valve control
  • Open- / closed-loop system programming
  • 4 - 20 mA output [programmable]
  • Built-In equipment test circuits
  • Series DC4000 Data Sheet

AC4000 Series
dc4500 series controller

  • 0 - 50,000 µS display
  • High accuracy iron vane meter
  • Temperature compensation input
  • Bleed and feed indicator lights
  • Flow and switch input and indicator
  • Adjustable bleed conductivity set point
  • Automatic hysteresis 6% of set point
  • Adjustable calibration set point
  • Meter test circuitry
  • Bleed and feed simultaneously
  • 4 - 20 mA recorder output (optional)
  • Series AC4000 Data Sheet

AC5000 Series
dc4000 series conductivity controller

  • 0 - 50,000 µS display
  • High accuracy iron vane meter
  • Temperature compensation input
  • Bleed and feed indicator lights
  • Flow and switch input and indicator
  • Adjustable bleed conductivity set point
  • Automatic hysteresis 6% of set point
  • Adjustable calibration
  • Meter test circuitry
  • 4 - 20 mA recorder output (optional)
  • Series AC5000 Data Sheet


(800) 378-1500
190 Summer St.
Lunenburg, MA 01462