Model 3175 Water Treatment Controller for Boilers and Cooling Towers

New touchscreen boiler and cooling tower water treatment controller with data logging and expanded features at an affordable price.

This innovative water treatment controller features a fast and responsive touch screen display to keep your on-site time productive. More than just a touch screen, it includes an updated processor and many other components that allow modern connectivity, data logging, and many future possibilities.

Best of all, we kept the familiar navigation and configuration from the Model 1575e,140, and 150 water treatment control systems that water treaters love. 

Leveraging our decades of field experience, the model 3175 controller was designed to provide reliable control of your water chemistry and years of maintenance-free service. Accurately control boiler and cooling tower conductivity, ORP, and pH by ordering a Model 3175 water treatment controller today!


Model 3175 Boiler and Cooling Tower Water Treatment Controller Overview

  • Accurately controls boiler and cooling tower conductivity. A standard secondary input may be used to control ORP or pH.
  • Easy to program with an intuitive menu to configure for either cooling tower, boiler, or condensate applications with appropriate conductivity sensors.
  • Larger 7” responsive touch screen display for quicker setup compared to using a keypad.
  • Updated processor for modern connectivity and datalogging.
  • Email alarm notifications.
  • Reliable circuitry that has been proven for two decades to accurately control your water chemistry.
  • User-selected relay options for a high level of application flexibility.
  • Configure relays to your preference – for setpoint control, based on water meter, percent of blowdown or percent of time.
  • Up to 12 scheduled feeds can be configured for excellent control of your system.
  • Affordably priced between our Model 1575e and NexSys water treatment control systems.

Model 3175 Water Treatment Controller Preview

Model 3175 Controller Features

  • 7” color touchscreen display.
  • (5) Output relays with 1 typically used for the bleed/blowdown, plus 4 chemical feeds.
  • (2) Water meter inputs
  • (2) drum switch inputs
  • (1) conductivity input
  • (1) flow switch input
  • (1) 4-20mA input
  • (1) 4-20mA output
  • Data logging with onboard historical graphs and .csv file output.
  • Ethernet capability.
  • Remote communications.
  • Email notification of alarm conditions.
  • Removable power cord and receptacles for conduit installations. Enclosure is rated NEMA 4X.
  • Single circuit board for high reliability and lower cost.
  • Large shallow enclosure for easy wiring.
  • Ball valve delay feature allows accurate control of motorized ball valves.

Product Documentation

Cooling Tower Water Treatment Controller Application

Boiler Water Treatment Controller Application

Product Specifications

  • Model: 3175
  • Conductivity range: 50-10,000 μS
  • Conductivity sensor: 2 electrode
  • Conductivity Resolution: ± 10 μS (conductivity <5000 μS) / ±100 μS(conductivity > 5000 μS)
  • Temperature comp.: 500NTC, NONE
  • Accuracy & repeatability: ± 1.0%
  • Deadband/Setpoint: Programmable
  • Auto/Manual outputs: Menu selectable
  • Interface: 7 inch capacitive touchscreen
  • Drum Switch Inputs: 2 digital contact inputs
  • Water meter inputs (2): Contact head, paddle wheel, or turbine
  • Timers: Max. blowdown time exceeded and relay run time exceeded
  • Output Signal: One 4 – 20 mA, isolated or non-isolated optionally powered output for conductivity
  • Input Signal: One 4-20 mA, non- isolated internally powered input for conductivity
  • Output relays: 5, 4 selectable use, 1 blowdown
  • Relay ratings: 3A each, 10A total
  • Power: 120/240 VAC 50/60 Hz
  • Ambient: 32° – 120°F (0 – 49°C)

Have questions? Get in touch with us!


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