Products

DULCOTEST® Redox Sensors


Redox Measurement

The Redox potential measures oxidants or reducing agents in a medium. The measurement of this parameter is relatively cost-efficient, however, it has also some disadvantages: These include non-selective determination of a defined oxidant or reducing agent, strong pH dependence, and the measured signal has a saturation curve with increasing concentration.

The Redox potential is a parameter that does not determine a specific oxidant or reducing agent, but will measure all agents within the sample line. The measured signal is strongly pH dependent and has a saturation curve with increasing concentration. The Redox measurement can be used as a cost-efficient alternative to direct determination of oxidants and reducing agents (e.g. via amperometric probes) or as a secondary measurement. For this purpose, the following conditions must be observed:

  • The sample line being analyzed is potential and there are no other redox active connections
  • The pH value of the process fluid remains constant
  • The expected concentration is located in the steep section of the saturation curve

Application Areas

  • Cyanid detoxication at high pH value by oxidation
  • Chromate detoxication at low pH value by reduction
  • Monitoring of disinfection effect when metering oxidants
  • Etc.

Our Program offers the following Advantages:

  • 11 types of electrodes, in different versions (electric connection, installation length, cable length)
  • Fittings for simple installation into bypasses, containers, piping, an adapter fitting allows replacement without interrupting the process
  • Measuring transmitter with display/control to send a signal to a programmable logic controller (PLC) and without display/control
  • Control devices with staged capacities
  • Integration of the control circuits into Bus systems (PROFIBUS®-DP, CANopen-Bus)
  • Easy calibration with buffer solutions

 

Our product family DULCOTEST® Redox Electrodes offers a large range of electrodes for the solution of your measuring task. Application ranges include not only rather simple tasks in water treatment processes but also applications in industrial process waters with higher requirements as to temperature, pressure, pollution tolerance and chemical resistance.

The production process of our electrodes is subject to strictest quality controls. It is automated in routine steps but manually affected under professional control in critical steps. Thus, we reach an optimum of reproduced quality and cost reduction for you.

Advantages

  • Precise and reliable measurement, enable efficient process guidance and highest process safety.
  • Long lifetimes thanks to highest glass quality, optimized production and selection of the correct sensor. Thus, dead times and efforts for maintenance can be reduced.
  • Short stock times and short delivery times result in best-possible exhaustion of an electrode’s lifetime (weathering of an electrode already begins just after its production).
  • Special versions for installation length, cable length and plug for tailor-made process connections
  • OEM partner receive as private label.
  • Short delivery times enable short-time replacement
  • Storage in a protective tubular filled with electrolytes, which enables best-possible protection during transportation and measuring breaks
  • For detailed information on the individual sensors please see the download section.

Selection guide for electrodes

Medium Max.
Temperature
° F [° C]
Max.
Pressure
psig [bar]
Electrode
Clear medium 140 (60) 7.3 (0.5) RHE     (swimming pool, portable water)
43.5 (3) RHES  (swimming pool, portable water) 
87 (6) RHEP-Pt-SE  (electroplating, process  water)
RHEP-Au-SE (cyanide detoxication, ozone monitoring)

140 - 176

 (60 - 80)

7.3 (0.5) RHEP-Pt-SE  (electroplating, process  water)
RHEP-Au-SE (cyanide detoxication, ozone monitoring)
176 (80) no overpressure RHEN  (high accuracy, long life)
Medium with 
solid components
176 (80) 87 (6)  RHER
77 (25) 232 (16) RHEX  (emulsion, suspension sludge)
212 (100) 87 (6) RHEX  (emulsion, suspensionsludge)

 

 

 

Housings

DGMa modular in-line sensor housing

Features Advantages and benefits  
  • Modular design for up to five (more on request) sensors of any type (PG 13.5 and/or R 1" thread)
  • Cost effective and simple upgrading/retrofitting through variable modules
  • Enhanced measuring and process safety by means of the flow monitor module
  • Resistant to electrical interference through a potential equalizer pin
  • Simple assembly (pre-mounted on panel)
  • Simple and quick installation
  • Quick response time of the measurement because of low volume capacity

DLG III in-line sensor housing

Features Advantages and benefits  
Multiple Sensor housing for
  • Simple cleaning of the sensor housing and sensor by means of a removable housing cup
  • Cup can be used as container for a calibration solution
  • two sensors (pH, redox, conductivitiy, temperature, fluoride) with thread PG 13.5 plus
  • Enhanced measuring- and process safety as housing is resistant to electrical interference due to a potential equalizer pin
  • one sensor (chlorine, bromine, chlorine dioxide, ozone) with thread R 1" (25mm)
  • Simple and quick installation
 
  • Quick response time of the measurement because of low volume capacity

DLG IV in-line sensor housing

Features Advantages and benefits  
  • Multiple housing for up to four sensors (pH, ORP, conductivity, temperature, fluoride; PG 13.5 thread)
  • Simple cleaning of the sensor housing and sensor by means of a removable housing cup
  • Cup can be used as container for a calibration solution
  • Resistant to electrical interference through a potential equalizer pin
  • Enhanced measuring- and process safety as housing is resistant to electrical interference due to a potential equalizer pin
  • Simple and quick installation
  • Quick response time of the measurement because of low volume capacity

PP submersible sensor holder Type IPHa 3

Features Advantages and benefits  
  • For up to three electrodes (pH, ORP, conductivity, temperature, fluoride; PG 13.5 internal thread)
  • Immersion depths: 3 ft., 6 ft., (1 m, 2 m)
  • Accepts a maximum of three sensors (e.g. pH, redox, temperature) with PG 13.5 internal thread, standard length 4.7" (120 mm)
  • Customer can shorten the immersion lance/cut to length on site
  • Enhanced measuring and process safety as housing is resistant to electrical interference though a potential equalizer pin
  • Simple and quick installation
  • Various accessories available
  • Assembly to a flange possible

PP submersible sensor holder Tye IPHa 1

Features Advantages and benefits  
  • For up to three electrodes (pH, ORP, conductivity, temperature, fluoride; PG 13.5 internal thread)
  • Immersion depths: 3 ft., 6 ft., (1 m, 2 m)
  • Accepts a maximum of three sensors (e.g. pH, redox, temperature) with PG 13.5 internal thread, standard length 4.7" (120 mm)
  • Customer can shorten the immersion lance/cut to length on site
  • Enhanced measuring and process safety as housing is resistant to electrical interference though a potential equalizer pin
  • Simple and quick installation
  • Various accessories available
  • Assembly to a flange possible

Insertion Housing Adapter

Features Advantages and benefits  
  • For one sensor (pH, ORP, temperature, conductivity; PG 13.5 thread)
  • Simple assembly in pipes and tanks with enhanced requirements for pressure and temperature
  • Mounting: Screw in
  • Material: PP for temperatures up to 176° F (80° C) or stainless steel up to 356°  F (180° C)
  • Thread: R ½" and R ¾"

Insertion Housing Adapter Set

Features Advantages and benefits  
  • For one sensor (pH, ORP, temperature, conductivity; PG 13.5 thread)
  • Simple assembly in pipes and tanks for standard conditions
  • Mounting: Glue in place
  • Material: PVC for temperatures up to 122° F (50° C)
  • 90° and 45° angle for optimal orientation of the sensor
  • 3/4" (DN 20) and 1" (DN 25)

Retractable Assembly WA-PH 1

Features Advantages and benefits  
  • For one pH or ORP electrode (PG 13.5 thread, length: 4.33"-4.93" (110-125 mm)

Direct and simple assembly in pipes and tanks

  • Mounting: Thread in
  • Material: PP
Electrodes can be changed without interrupting the process
  • Thread: 3/4"

 

 

Portable Measuring Devices

Photometer

Microprocessor-controlled Photometer for calibrating amperometric and fluoride measuring systems. Photometers are pre-assigned to defined verification procedures and include various measurements. (...more)

 

 

Multi-Parameter Controller diaLog DACa

The diaLog DACa controller uses intelligent controller functions to close the control circuit between ProMinent DULCOTEST® sensors and ProMinent® metering pumps. (...more)

 

Single-Channel Measuring and Control Instrument DULCOMETER® Type D1Cb/ D1Cc

The DULCOMETER® Type D1Cb is suitable for applications in drinking water, wastewater and cooling water treatment. The single-channel measuring and control unit D1Cb is equipped for all-important measured variables for basic applications in water treatment and with an error and calibration log book (...more)

 

Measuring and control device DULCOMETER® Compact

The new measuring and control device DULCOMETER® Compact for pH and redox measured variables is equipped with the standard functions for use in water treatment plants, allowing the operator to switch between the measured variables pH and redox, and between P and PID control characteristics. (...more)

 

Measuring and control device DULCOMETER® Compact

The new measuring and control device DULCOMETER® Compact for pH and redox measured variables is equipped with the standard functions for use in water treatment plants, allowing the operator to switch between the measured variables pH and redox, and between P and PID control characteristics. (...more)

 

DULCOMETER® DMT 2-Wire-Transmitters

Compact 2-wire-transmitter with microprocessor technology. Reliable monitoring for pH, Redox, Chlorine, conductive conductivity and temperature applications. (...more)

 

Measuring and control device DULCOMETER® Compact

The new measuring and control device DULCOMETER® Compact for pH and redox measured variables is equipped with the standard functions for use in water treatment plants, allowing the operator to switch between the measured variables pH and redox, and between P and PID control characteristics. (...more)

Brochures

Cut Sheet: Chlorine Analyzer Packages | Part #: 7750243 | Updated: 8/21/14
Cut Sheet: DACa Controller | Part #: 7750242 | Updated: 9/10/13
Cut Sheet: Dulcometer Controllers | Part #: 7750240 | Updated: 7/12/13

Catalog Section

Catalog: D1Cb & D1Cc Catalog Section | Part #: xxxxxx | Updated: 9/1/13
Catalog: DACa Catalog Section | Part #: xxxxxx | Updated: 9/1/13
Dulcometer Controllers: DACa Controller | Part #: xxxxxx | Updated: 8/5/13

Identity Code

Identity Code: D1ca | Part #: xxxxxx | Updated: 4/24/13
Identity Code: D1cb | Part #: xxxxxx | Updated: 4/24/13
Identity Code: D2ca | Part #: xxxxxx | Updated: 4/24/13
Identity Code: Orp Sensor Fixed Cable | Part #: xxxxxx | Updated: 4/24/13

Instructional Videos

Video: D1Ca | Part #: xxxxxx | Updated: 4/23/13
Video: D1Cb | Part #: xxxxxx | Updated: 4/23/13
Video: DACa Controller - Part 1 - Overview (WEBINAR) | Part #: xxxxxx | Updated: 8/7/13
Video: DACa Controller - Part 2 - Identity Code (WEBINAR) | Part #: xxxxxx | Updated: 8/14/13
Video: DACa Controller - Part 3 - Controller Comparison (WEBINAR) | Part #: xxxxxx | Updated: 8/21/13
Video: DACa Controller - Part 4 - Live Demo (WEBINAR) | Part #: xxxxxx | Updated: 8/28/13
Video: DT1 - 4 Photometric Test Kits | Part #: xxxxxx | Updated: 7/11/14
Video: Setting Up A New DACa Controller (WEBINAR) | Part #: xxxxxx | Updated: 12/13/13

Manuals And Instructions

Data Sheet: Data Shee RHEP Pt And Au SE | Part #: 987465 | Updated: 8/1/00
Data Sheet: Data Sheet RHE Pt SE | Part #: 987466 | Updated: 8/1/00
Data Sheet: Data Sheet RHEK Pt SF | Part #: 987464 | Updated: 8/1/00
Data Sheet: Data Sheet RHEN Pt SE | Part #: 987462 | Updated: 8/1/00
Data Sheet: Data Sheet RHER Pt SE | Part #: 987463 | Updated: 8/1/00
Data Sheet: Data Sheet RHEX Pt SE | Part #: 987461 | Updated: 8/1/00
Manual: D1C Setting Record | Part #: 987205 | Updated: 7/1/05
Manual: D1Cb & D1Cc O&M | Part #: 986362 | Updated: 9/1/11
Manual: D1Cb/D1Cc | Part #: 986362 | Updated: 9/11/14
Manual: D2C Part 1: French & English | Part #: 987613 | Updated: 12/1/08
Manual: D2C Part 2 Chlorine | Part #: 986846 | Updated: 12/1/08
Manual: D2C Part 2 PH/Chlorine | Part #: 987855 | Updated: 7/19/13
Manual: D2C Part 2 PH/Chlorine Dioxide | Part #: 986736 | Updated: 1/6/14
Manual: D2C Part 2 PH/ORP | Part #: 987822 | Updated: 10/1/08
Manual: D2C Part 2 PH/pH | Part #: 987661 | Updated: 1/7/14
Manual: D2C Settings Deocumentation | Part #: 987279 | Updated: 4/3/14
Manual: DACa Controller O&M | Part #: 985217 | Updated: 7/19/13
Manual: Fluoride Panel English | Part #: 987315 | Updated: 10/1/08
Manual: Part 2: Adjustment & Operation Bromine | Part #: 987353 | Updated: 2/1/07
Manual: Part 2: Adjustment & Operation Chlorine | Part #: 987905 | Updated: 3/1/09
Manual: Part 2: Adjustment & Operation Chlorine Dioxide | Part #: 981734 | Updated: 6/1/07
Manual: Part 2: Adjustment & Operation Chlorite | Part #: 987028 | Updated: 3/5/14
Manual: Part 2: Adjustment & Operation Conductivity Conductive | Part #: 987926 | Updated: 4/1/08
Manual: Part 2: Adjustment & Operation Fluoride | Part #: 987306 | Updated: 5/1/07
Manual: Part 2: Adjustment & Operation H2O2 Peracetic Acid (PAA) | Part #: 987936 | Updated: 12/1/08
Manual: Part 2: Adjustment & Operation H2O2 Peri (Peroxide) | Part #: 986847 | Updated: 11/1/07
Manual: Part 2: Adjustment & Operation Inductive Conductivity | Part #: 986954 | Updated: 10/1/08
Manual: Part 2: Adjustment & Operation Oxygen | Part #: 987139 | Updated: 7/1/07
Manual: Part 2: Adjustment & Operation Ozone | Part #: 987698 | Updated: 12/1/07
Manual: Part 2: Adjustment & Operation PAA | Part #: 986976 | Updated: 3/9/14
Manual: Part 2: Adjustment & Operation PH | Part #: 987907 | Updated: 3/1/07
Manual: Part 2: Adjustment & Operation Redox/ORP | Part #: 987850 | Updated: 10/1/10
Manual: Part 2: Adjustment & Operation Standard Signal | Part #: 987528 | Updated: 4/1/07
Manual: Part 2: Adjustment & Operation Temperature | Part #: 981809 | Updated: 4/1/07
Manual: Pause Normal Hold Function | Part #: - | Updated: Unknown
Manual: PH ORP Sensor Recommendations | Part #: 985830 | Updated: 7/1/08
Manual: PH Sensor Overview | Part #: 987768 | Updated: 4/1/99
Manual: Redox Sensors Overview | Part #: 987768 | Updated: 12/1/00

Quickstart Guide

Quickstart Guide: Calculating PID Values For D1C Cl | Part #: None | Updated: Unknown
Quickstart Guide: Calculating PID Values For D1C PH | Part #: None | Updated: Unknown
Quickstart Guide: Calculating PID Values For D1C Redox | Part #: None | Updated: Unknown
Quickstart Guide: Calculating Proportional Values For Cl | Part #: None | Updated: Unknown
Quickstart Guide: CDN CLE Quick Start | Part #: None | Updated: Unknown
Quickstart Guide: CDN CTE Quick Start | Part #: None | Updated: Unknown
Quickstart Guide: D1C PH Calibration Quick Start | Part #: None | Updated: Unknown
Quickstart Guide: ORP Quick Start | Part #: 7750088 | Updated: Unknown

Sensor Manuals And Instructions

Data Sheet: Data Sheet PH Senosr With Vario Pin Head | Part #: 987501 | Updated: 5/1/00
Data Sheet: Data Sheet Vario Pin Connections | Part #: 987625 | Updated: 9/1/99
Parts List: DGMa Manual Parts List From July 03 | Part #: 987356 | Updated: 10/1/11
Sensor Manual: BRE 1 And 2 MA Sensors | Part #: 987341 | Updated: 8/6/14
Sensor Manual: CDE 2 And 3 MA Sensors | Part #: 986656 | Updated: 8/1/08
Sensor Manual: CGE2 MA And 4P Sensors | Part #: 987354 | Updated: 9/1/07
Sensor Manual: CLE 3 1 Manual | Part #: 987320 | Updated: 2/1/09
Sensor Manual: CLE CTE CGE CAN Sensors Supplement | Part #: XXXXXX | Updated: 11/4/14
Sensor Manual: CLT 1 Manual | Part #: 987069 | Updated: 10/1/09
Sensor Manual: CTE 1 MA And DMT Sensors | Part #: 987371 | Updated: 12/1/09
Sensor Manual: CTE 1 Short Manual | Part #: 987690 | Updated: 2/1/99
Sensor Manual: Data Sheet LFT 1 FE | Part #: 987884 | Updated: 4/1/99
Sensor Manual: Data Sheet Pt 1000 SE | Part #: 986685 | Updated: 5/6/14
Sensor Manual: DO 1 And 2 Sensors | Part #: 987199 | Updated: 1/4/14
Sensor Manual: Fluoride Sensor | Part #: 986544 | Updated: 6/8/14
Sensor Manual: Fluoride Transducer | Part #: 987342 | Updated: 8/3/14
Sensor Manual: ICT 2 Conductivity Sensor | Part #: 986948 | Updated: 12/1/10
Sensor Manual: ICT IMA Conductivity Sensor | Part #: 986949 | Updated: 7/4/14
Sensor Manual: ICT1 Conductivity Sensor | Part #: 986955 | Updated: 12/1/09
Sensor Manual: LF Conductivity Sensor | Part #: 987823 | Updated: 9/6/14
Sensor Manual: Measuring Transducer 4-20mA FP V/1 FP 100 V1 | Part #: 986545 | Updated: 7/8/14
Sensor Manual: OZE 3 MA And OZE 2 4P Manual | Part #: 981815 | Updated: 7/1/96
Sensor Manual: PAA 1 Sensor | Part #: 986961 | Updated: 10/1/08
Sensor Manual: PER 1 Sensor | Part #: 986884 | Updated: 12/1/09
Sensor Manual: PH ORP Temp Transducer 4L | Part #: 987467 | Updated: 12/1/00

Frequently Asked Questions

Standard Lead Times for Products / Expediting

Standard lead times are listed below. If you need an order expedited, please contact your customer service representative. Please be aware that overnight shipments receive priority over ground shipments. Gala/Beta/Concept - 3 days Sigma series - 5 days ProMus - 2 weeks Dulcometer 3-4 days

When discharging to atmosphere, what steps will improve repeatability of dosing?

Installing a spring in the discharge valve of the pump gives some improvement, but for the maximum improvement, a backpressure valve should be installed at the end of the line.

What variables can be measured or controlled with ProMinent equipment?

We can measure or control pH, Redox, Free or Total Chlorine, Chlorine Dioxide, Conductivity, Ozone, Peracetic Acid, Hydrogen Peroxide and Dissolved Oxygen.

Can you explain what the different options are using the Ident-code for the D1C controller?

The Identcode for a D1C has 13 parameters that can be specified. The first parameter is the type of mounting such as wall or panel mount. Then the operating Voltage must be selected. The measured variable is the parameter being measured such as pH, chlorine, Redox ? The next selection is the connection of measured variable, which selects how the sensor is wired, such as an SN6 connector. The correction variable selects whether there is pH or temperature correction. The next variable is feed forward capability. This signal can be used for metering proportional to the flow rate. The control input allows control by contact closure. The signal output function can be set up as measured, controlled or correction variable. The power control variable pertains to the alarm functions and how and what they control. The pump control option is set up for whether pumps will be controlled. The control characteristic sets the pump up for proportional control band or the more sophisticated PID control. The interface is not used at this time. The last variable allows for the selection of the language.

When programming the D1C, what options can I enable or disable?

The D1C controller can be set up for a complete operating menu or a reduced menu. The reduced operating menu permits operation of the most important parameters, but will not allow the operator to change system parameters that are normally set up once, during initial installation. The complete operating menu allows all parameters to be changed.

What is feed forward control?

This signal can be used for metering proportional to the flow rate.

What option is required on controllers when you want to connect to a chart recorder?

The controller must have the signal output option for measured value for recording or two mA outputs.

What do I need to order with a D1C?

SEE WORD DOC

What do I need to order with a D2C?

SEE WORD DOC

I am working with a ProMinent D1C controller and controlling pH. I keep getting a check sensor error. What is causing this problem?

The problem may be that the checkout time is set too low. This feature is used to detect a defective sensor: if the value is set to 1 second, the processor looks for changes on the sensor readings; if the display does not change during this interval, a check sensor will result. This feature can be set from 1 to 9999 seconds or turned off in the measure value mode of the controller. Turn the checkout time to off or set the measured time to at least 60 seconds, so the sensor is checked once a minute instead of once every second.

Where are conductivity controllers most commonly used?

Conductivity controllers are used in industries including, paper, pharmaceutical, plating, electronics, breweries, power production, and plating. Two very popular applications are bottle washing and cooling towers.