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

2. ProMinent Dosiertechnik GmbH Heidelberg
Fundamentals
ProMinent Types
Applications
ProMinent Dosiertechnik GmbH Heidelberg

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

4. Advantages of ProMinent Sensors
Amperometry
Advantages of ProMinent Sensors
Membrane covered sensors compared to
uncovered electrodes
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
Variety of different measuring parameters available
Per acetic acid
Dissolved oxygen
by special sensor design:
different membrane materials
different electrolytes
different electrode materials
different polarization voltage
chlorite
free chlorine
HOCl
total chlorine
chlorine dioxide
ClO2
organic chlorine
total bromine O= N
Cl-
-Cl
ozone O3
ProMinent Dosiertechnik GmbH
Dulcotest
Dr. Thomas Winkler
Hydrogen peroxide
H2O2

5. Advantages of ProMinent Sensors
Amperometry
Advantages of ProMinent Sensors
2-wire-technique available in xxx-mA-types
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
ProMinent Dosiertechnik GmbH
Dulcotest
Dr. Thomas Winkler

6. Technical Design of Sensor Types
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, Cl2, O3 ,ClO2
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)
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
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
ProMinent Dosiertechnik GmbH
Dulcotest
Dr. Thomas Winkler