Download Bromine Sensor

ProMinent Product Overview
Measuring and Control Technology
Optical
Sensors
Instruments
Turbidity
Amperometric
Chlorine
Bromine
Controller
Potentiometric
pH
Chlorine
dioxide
ORP
Ozone
Fluoride
Conductometric
conductive
inductive
H2O 2
Chlorite
Dissolved
Peracetic
acid
05.02.04
oxygen
ProMinent Dosiertechnik GmbH
Dulcotest
Dr. Thomas Winkler
Transmitter
1 channel
(D1C)
Non EX
(DMT)
2 channel
(D2C)
EX
(2xxxseries)
4 channel
(DDC)
1
Dulcotest
Sensors
Amperometric
Sensors
 Fundamentals
 ProMinent Types
 Applications
ProMinent Dosiertechnik GmbH Heidelberg
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
05.02.04
membrane
venting
hole
ProMinent Dosiertechnik GmbH
Dulcotest
Dr. Thomas Winkler
O-ring
referenceand counter
electrode
working electrode
3
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
by special sensor design:
chlorite
 different membrane materials
 different electrolytes
 different electrode materials
N
ProMinent Dosiertechnik GmbH
O=
 different polarization voltage Dulcotest
N
05.02.04
Dr. Thomas Winkler
N
4
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
05.02.04
ProMinent Dosiertechnik GmbH
Dulcotest
Dr. Thomas Winkler
5
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)

05.02.04
ProMinent Dosiertechnik GmbH
Dulcotest
Dr. Thomas Winkler
6
Installation Considerations:






05.02.04
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
7
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
05.02.04
ProMinent Dosiertechnik GmbH
Dulcotest
Dr. Thomas Winkler
8