DCM 3 Series Controller

A recreational and attraction water chemistry solution!

The ProMinent® DCM 3 Series controller is the perfect partner for remote monitoring and controlling water chemistry and processes in pools, spas, hotels, motels, and condos. The DCM 3 Series precision and uncompromising quality represent a world-class IIoT solution to ensure a safe and healthy water experience for your customers and peace of mind for you.


    Stay Connected
  • Receive email and text alarms
  • Make changes from your smartphone, tablet or computer
  • No apps required to connect and control
  • Automatic emailing of data logs
  • WiFi, Ethernet and 4G capable
    Stay in Control
  • Monitor flow rate
  • Precision chemical feed
    1. 1. Proportional control strategies
      2. Control output of ProMinent pumps
    Stay Safe
  • Configurable digital interlocking to flowmeter and circ pump
  • 8 discrete assignable passwords at three access tiers
  • Simultaneous monitoring and control of ORP and PPM
    World-Class Accuracy
  • pH sensor accurate to 0.04 SU per NSF


  • Residental and Commercial swimming pools
  • Therapy pools
  • Spray/splash pads
  • Hot tubs
  • Fountains

Ordering Information

DCM 300 - Controller package for pH, ORP and Temp (P/N: 1107687)
DCM 300 Salt - Salt pool controller package for pH, gold ORP and temp (P/N: 1107688)
DCM 300 Salt plus - Salt pool controller package pH, gold ORP, conductivity/TDS, and temp (P/N: 1107689)
DCM3Cl - True PPM controller package for pH, free chlorine PPM, and temp (P/N: 1107690)
DCM3Cl plus - True PPM controller package for pH, free chlorine PPM, conductivity/TDS and temp (P/N: 1107691)
DCM3ClORP - True PPM controller package for pH, ORP, PPM and temp (P/N: 1118932)


Specifications Details
Operator interface
Remote Fully interactive Ethernet TCP/IP graphical interface with security access codes
Local 4 line - 20 character OLED display, 12 buttons, multicolor controller status LED, multicolor output LEDs indicate relay output status, Ethernet, and Wifi status LEDs
Included sensors pH, (ORP and/or PPM), temperature
Optional sensors Conductivity, feed verification, flow rate, water level, calculated LSI/Ryznar, water totalizer
Digital inputs 6, (5 fully configurable) Examples: sample flow switch, return line low switch, digital pulse flow meter(s), auto-fill float switch, external interlocks
Analog inputs Up to 5 standard (configurable options) + 9 virtual (LSI, flow rate, etc.)
Example: conductivity, pH, [ORP and/or free chlorine], sample temp, flow via pulse input
Control relays 5 total: 2 AC line voltage, 3 dry contact (AC or DC), all are fully assignable
1. Acid feed
2. Oxidant feed
3. Autofill
4. CO2 feed
5. Alarm
*Interlocked with sample flow when used for chemical feed

Time modulation (proportional)
Time cycling
ORP and/or free chlorine
Event timers ‐ for alternate oxidant setpoint or timed feed of chemical (filter aid)
Chem feed stop during bump or backwash
Flow restored delay (adjustable)
Blocking and lockout for added control
10 base T, TCP/IP Ethernet, optional wireless 4G cellular
HTML, micro web server with DHCP or user definable IP address
Standard built-in WiFi router (smartphone/ iPad/ tablet)
USB port for datalog extraction, configuration saving, configuration uploading, & field software updates
Local and remote access protected by access codes (Up to 8 unique users and passwords with 3 access levels)
Power 120 VAC, 50/60Hz, 7.9Amp, single phase
Fusing Outputs fused @ 6.3 Amps total @ 120 VAC, Internal circuits fused at 1.6 Amps
Surge Suppresion Integral surge suppression - Relays 1-5
Accessory Power 15VDC Thermally fused @ 60 mA, (no NAMUR inputs)
Enclosure Non-metallic, NEMA 4X, IP65
Panel Dims. 18" x 30" x 6.5" (WxHxD)
Convenience Field Software upgrades via USB flash drive, configuration cloning via flash drive
NSF/ANSI/CAN Standard 50
MET to UL 61010-1
CSA Can/CSA-22.2 No. 61010-1-12
5 years on electronics
2 years on ORP, pH sensors
1 year on all other parts


Cut Sheet: DCM3 Series | Part #: 7750510 | Updated: 7/7/22

Manuals And Instructions

Manual: DCM3 Browser Rev. 3/2020 | Part #: None | Updated: 8/11/22
Manual: DCM3 Installation And Operating Manual Rev. G1 | Part #: None | Updated: 11/8/22

Quickstart Guide

Quickstart Guide: DCM3 Quickstart Guide | Part #: 7750429 | Updated: 10/27/22

Firmware Updates

Version Update Summary Release Date
  • WARNING: It is required to have Remote HMI version 16 or higher
August 11, 2022

Remote HMI Updates (Web Browser HTML Updates)

Version Update Summary Release Date
  • Bug Fix: Trend Header, setpoint marker on Measure panel bar graph, varying Cycle setpoint locations
November 06, 2019
Help Files Instruction manual USB Update Zip File November 08, 2022