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05.02.04 ProMinent Dosiertechnik GmbH Dulcotest Dr. Thomas Winkler 1 ProMinent Product Overview Measuring and Control Technology SensorsInstruments Potentiometric.

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Presentation on theme: "05.02.04 ProMinent Dosiertechnik GmbH Dulcotest Dr. Thomas Winkler 1 ProMinent Product Overview Measuring and Control Technology SensorsInstruments Potentiometric."— Presentation transcript:

1 ProMinent Dosiertechnik GmbH Dulcotest Dr. Thomas Winkler 1 ProMinent Product Overview Measuring and Control Technology SensorsInstruments Potentiometric Amperometric Conductometric Chlorine Bromine Chlorine dioxide Ozone H O 22 Peracetic acid pH ORP Fluoride conductive inductive ControllerTransmitter 1 channel (D1C) 2 channel (D2C) 4 channel (DDC) Non EX (DMT) EX (2xxx- series) Dissolved oxygen Optical Turbidity Chlorite

2 Dulcotest Sensors Amperometric Sensors ProMinent Dosiertechnik GmbH Heidelberg  Fundamentals  ProMinent Types  Applications

3 ProMinent Dosiertechnik GmbH Dulcotest Dr. Thomas Winkler 3 2 wire connector clamping ring sensor body containing amplifier and temperature compensation (NTC) electrodes membrane cap containing electrolyte upper part with lead through for cable Amperometry ProMinents‘ Sensor Construction working electrode reference- and counter electrode membrane venting hole O-ring 2 wire connector 1=positive 2=negative

4 ProMinent Dosiertechnik GmbH Dulcotest Dr. Thomas Winkler 4  less dependency on sample flow (no flow control required )  no drifts of zero point  reduced running in time  less interference by sample matrix (chemicals, emulsions, etc.)  control of electrode reactions by defined conditions Amperometry Advantages of ProMinent Sensors Membrane covered sensors compared to uncovered electrodes Variety of different measuring parameters available free chlorine HOCl total chlorine organic chlorine total bromine Hydrogen peroxide H 2 O 2 chlorine dioxide ClO 2 by special sensor design:  different membrane materials  different electrolytes  different electrode materials  different polarization voltage O= N N Cl- -Cl N Cl- ozone O 3 Per acetic acid Dissolved oxygen chlorite

5 ProMinent Dosiertechnik GmbH Dulcotest Dr. Thomas Winkler 5  sensor output: mA-Signal  no interference during long-distance-transfer  no special cable necessary  no plug necessary  sensor input: voltage supply of sensor  same 2 wires are used like for signal transfer  sensor electronics separates both functions Amperometry Advantages of ProMinent Sensors 2-wire-technique available in xxx-mA-types

6 ProMinent Dosiertechnik GmbH Dulcotest Dr. Thomas Winkler 6 Amperometry Technical Design of Sensor Types 2) Membrane Material  Determination of the selectivity  Hydrophobic membranes: high selectivity only unpolar compounds are permeable, e.g. HOCl, Cl 2, O 3, ClO 2 sensor-types: CLE, CDE and OZE ATTENTION: hydrophobic membranes are interferred by surfactants hydrophobic membranes are able to keep liquid electrolyte  Hydrophilic membranes: no selectivity all compounds dissolved in water are permeable sensor-types: CGE, CTE, BRE and CDP hydrophilic membranes are not interferred by surfactants hydrophilic membranes need a gel-electrolyte (reduced bleeding)

7 ProMinent Dosiertechnik GmbH Dulcotest Dr. Thomas Winkler 7 Installation Considerations:  Water flow through sensor holder 8 – 20 gph  Maintain constant water flow  Limit incoming pressure to 10 psi  Maintain constant pressure  Assure atmospheric pressure on effluent side  Avoid negative pressure (siphon) on effluent side

8 ProMinent Dosiertechnik GmbH Dulcotest Dr. Thomas Winkler 8 Maintenance Considerations:  Keep chlorine levels no more than twice rated value for the sensors  Keep the sensor and holder clean  Watch and prevent bubbles in the holder (bubbles can permeate the TFE membrane and displace electrolyte


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