DACa Controller

Intelligent measuring and controlling


The diaLog DACa controller uses intelligent controller functions to close the control circuit between ProMinent® DULCOTEST® sensors and ProMinent® metering pumps. The multi-parameter measurement and control device offers special functions for water treatment, such as the processing of variables and control parameter changeover. The new controller platform from ProMinent® was developed to continually measure and control the parameters required and can be configured for one or two measuring channels depending on application.


Sensors from 14 freely selectable measured variables can be connected per channel. The measurement and control device can communicate with analog or digital* sensors and actuators. The following will be available in the future for communication* with the control level: Profibus® DP, Modbus RTU, OPC and web server via LAN and WLAN.


Features & Benefits


  • Two measuring channels (via mV and mA inputs)
  • Free combination of 14 selectable measured variables
  • Two 2-way PID controllers with 4 metering pump relays
  • Sensor monitoring of pH
  • Control variables monitored by time to avoid incorrect metering
  • Data logger for measured values, control variables, calibration data and events with storage on SD card and depiction on the controller display
  • Storage and transfer of device setup via SD card
  • The pH influence on the chlorine disinfection parameter is compensated
  • 24 operating languages: all European languages as well as Arabic, Chinese, Korean, Hebrew, Russian, Thai
  • Measured variables and menu language are initialized during commissioning
  • Temperature compensation of measured variables pH, conductivity, chlorine dioxide and fluoride
  • Subsequent extension of software function via activation key or firmware update
  • Web server via LAN/WLAN for setup and visualization*
  • Two analog outputs for measured value, correction value or control variable (depending on optional equipment)
  • Five digital inputs for sample water error detection, pause and parameter changeover, chemicals level warning
  • Two relays with limit value function, timer and discontinuous control, 3-point step control (depending on optional equipment)


*In preparation




  • Potable water and sewage treatment
  • Wastewater treatment
  • Industrial and process water treatment
  • Swimming pool water treatment

Capacity Data

Measuring ranges Type of connection mV: pH: 0.00 - 14.00; ORP/redox potential: -1500 - +1500 mVType of connection mA (amperometric measured variables, measuring ranges according to sensors):Chlorine; chlorine dioxide; chlorite; bromine; ozone; hydrogen peroxide (PER sensor) hydrogen peroxide (PEROX sensor with transducer); peracetic acid; dissolved oxygenType of connection mA (potentiometric measured variables, measuring ranges according to transmitters: pH; ORP/redox potential, fluoride conductivity* (measuring ranges according to transmitters: via transmitter 0/4-20 mATemperature: via Pt 100/Pt 1000, measuring range 0-150 oC
Resolution pH: 0.01; ORP/redox potential: 1 mV; temperature: 0.1 oC; amperometric measurements (Chlorine etc.): 0.001/0.01 ppm, 0.01 vol. % 0.1 vol %
Precision 0.3 % based on the full-scale reading
Measurement input pH/ORP/redox (input resistance > 0.5 x 1012 Ω)
Correction variable Temperature via Pt 100/Pt 1000
Correction range 0-100 oC
Temp. Correction range 6.5-8.5
pH and chlorine disturbance variable Flow via mA or frequency
Control characteristic P/PID control
Control 2 two-sided controllers
Signal current output 2 x 0/4-20 mA electrically isolated, max. load 450 Ω, range and assignment (variables for measurement, correction and control) can be adjusted
Control output 2 x 2 pulse frequency outputs to control metering pumps
2 relays (limit value, 3-point step or pulse length control) 2 x 0/4-20 mA
Alarm relay 250 V ~3A, 700 VA contact type changeover contact
Electrical connection 90-253 V, 50/60 Hz, 25 VA
Ambient temperature 0-60 oC (for indoor installation or installation with protective housing)
Degree of protection Wall mounted: IP 67; control cabinet mounting: IP 54 (based on NEMA 4X)
Tests / Certifications CE, MET (corresponds to UL in accordance with IEC 61010)
Housing materials PC with frame protection
Dimensions 9.84” x 8.66” x 4.80” (W"xH"xD")

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Hopkins Technical Products, Inc. • P.O. Box 2023 • Brentwood, CA 94513

toll free: (800) 732-6704 • ph: (925) 240-2160 • fax: (925) 240-2166

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