BA 114C/07/en/04.95
No. 50074196
CCS 240 / 241
Chlorine Dioxide
Measuring Cell
Operating Instructions
Endress + Hauser
Nothing beats know-how
Table of contents
CCS 240 / 241
BE1CS240.CHP
Table of contents
1.
1.1
1.2
1.3
1.4
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Areas of application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ordering system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
2
2
2
2
2.
Measuring system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.
3.1
3.2
3.3
Design and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating principle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Influences on the measuring signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.
4.1
4.2
Installation in flow assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Flow assembly CCA 250 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Other flow assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.
5.1
5.2
5.3
5.4
Start-up and calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connection to the measuring transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Polarisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference measurement according to the DPD method. . . . . . . . . . . . . . . . . . . . . . . . . . .
Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
6
6
7
7
6.
6.1
6.2
6.3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checks and membrane change. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling with electrolyte . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
8
8
8
7.
Regeneration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9.
Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
10.
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4
4
5
5
1
1.
General
CCS 240 / 241
1.
General
1.1 Areas of application
1.3 Scope of delivery
Drinking, service and pool water must be
disinfected by means of suitable
disinfectants, such as chlorine dioxide. The
amount of disinfectant added must be
constantly adapted to continuously fluctuating
operating conditions. Disinfectant
concentrations that are too low compromise
disinfection; excessively high concentrations
drive up costs and may cause corrosion and
have a negative effect on taste.
The delivery comprises:
• 1 chlorine dioxide measuring cell
CCS 240 or CCS 241
• 1 cap for membrane protection or
for storage
• 50 ml of spare electrolyte in a squeeze bottle
• 1 spare cartridge with pretensioned
membrane
• 1 copy of installation and operating
instructions
The chlorine dioxide measuring cell CCS 240
or CCS 241 has been developed specifically
for this purpose and is used for continuous
acquisition of the chlorine dioxide
concentration. In conjunction with a
measuring and control instrument, it maintains
the desired optimal operating conditions for
disinfection.
Areas of application of the chlorine dioxide
measuring cell:
CCS 240: 0.05 – 20.00 mg ClO2/l
CCS 241: 0.01 – 5.00 mg ClO2/l
(trace range)
1.2 Unpacking
• Inspect for any damaged packaging!
The post office or freight carrier must be
informed of any damage. Keep damaged
packaging until the matter has been settled!
• Verify that the contents are undamaged!
Inform the post office or freight carrier as
well as the supplier of any damage.
• Check that the delivery is complete (see
section 1.3) and agrees with the shipping
documents and your order:
– Quantity delivered
– Unit type and version according to
nameplate
– Operating instructions
To facilitate distinction, the measuring cell
types are equipped with a rating plate and a
colour-coded ring on the cable gland:
• Chlorine dioxide measuring cell CCS 240:
green ring
• Chlorine dioxide measuring cell CCS 241:
yellow ring
1.4 Ordering system
Chlorine dioxide sensor CCS 240
Version
N
with NTC thermistor detector
Y
special version
CCS 240-
Trace chlorine dioxide sensor CCS 241
If you have any questions, consult your
supplier or the Endress+Hauser sales office in
your area (see back cover of these operating
instructions for addresses).
Version
N
with NTC thermistor detector
Y
special version
CCS 241-
2
⇐ complete order code
⇐ complete order code
2.
CCS 240 / 241
Measuring system
BE1CS240.CHP
2.
Measuring system
The complete measuring system comprises:
• Chlorine dioxide measuring cell
CCS 240 or CCS 241
• Measuring transmitter Mycom CCM 121/151
• Measuring cable CMK (order no. 50005374)
for connecting the chlorine measuring cell
to the measuring transmitter (only if cable
extension is required)
• The maximum line length is 30 m
• Flow assembly CCA 250
• Measuring instrument to determine the
reference value according to the DPD
method,
e.g. microprocessor photometer CCM 181
Chlorine
dioxide
meas. cell
Measuring cable
CMK
Mounting
positions for
pH and redox
electrodes
Meas. transmitter
Mycom CCM 121
Inductive
proximity switch
for flow
monitoring
Outlet
hose
connector
MYCOM-C
mg/l
°C
pHComp
%
HOLD pH1 CAL pH2
DPD
1
H0
Flow monitoring
float for 30 l/h min.
flow detection
V0 mg/l
V1 pH
V2 1
V3 2
2
H1
°C
H2
HOLD
CAL
Cl
pH
ON/OFF
ON/OFF
Inlet hose connector
Closure and
calibration solution cap
Fig. 2.1:
Example of complete
measuring system
3
3.
Design and function
3.
CCS 240 / 241
Design and function
3.1 Construction
The chlorine dioxide measuring cell CCS 240
or CCS 241 has been designed for easy
handling and can be dismantled for filling,
membrane changes and regeneration
(see fig. 3.1).
The measuring electrodes are located in a
measuring chamber that is separated from
the medium by a PTFE membrane highly
resistant to chemicals and mechanical stress.
The plastic-embedded gold cathode and the
silver/silver chloride anode are arranged in
the lower end of the shaft with the connecting
cable.
A special support grid between the gold
cathode and the PTFE membrane maintains a
defined distance und therefore also a uniform
electrolyte film with the advantage of a
relatively stable display with fluctuating
pressures and flow rates. The large electrolyte
volume combined with a large anode and a
small cathode area assures long life. The
membrane cap can be changed after removal
of the screw cap.
An NTC thermistor resistor is embedded in
the lower third of the shaft. Thanks to this
sensor, the measuring signal can be
automatically temperature-compensated, and
the temperature of the medium can be
displayed on the measuring transmitter.
1
2
Fig. 3.1:
Chlorine meas. cell CCS 240 or
CCS 241: Ready to operate
and dismantled
1
2
3
4
5
6
4
Permanently attached 3 m cable
Measuring chamber
Membrane cap with robust
dirt-repelling membrane
in “sandwich” design
Screw cap to hold the membrane
cap in place
Large-area anode
silver/silver chloride
Gold cathode
5
6
3
4
CCS 240 / 241
3.
Design and function
BE1CS240.CHP
3.2 Operating principle
3.3 Influences on the measuring
signal
When a measuring cell is connected to the
corresponding measuring transmitter, a fixed
external voltage is applied to the electrodes.
Due to the difference in electrode area, this
results in a polarisation at the gold cathode.
The polarisation current generated during
polarisation is visible on the measuring
transmitter by very high display values which
decrease over time and eventually stabilise.
Polarisation must be complete before the
measuring cell can be calibrated.
Flow rate
The membrane-covered measuring cell
requires a minimum flow velocity of 15 cm/s in
order to function. When using the flow
assembly CCA 250, this value corresponds to
a flow rate of 30 litres per hour (upper edge of
float at level of red bar mark). The measuring
signal is virtually flow-independent at more
elevated flow rates while a flow dependence
exists for flow velocities lower than the value
mentioned above. When an INS proximity
switch is installed in the assembly, insufficient
flow rates can be reliably detected, and an
alarm signal can be issued, e.g. to disable
chlorine dioxide proportioning.
Chlorine dioxide is present in the medium as
a physically dissolved gas and is transported
towards the membrane by the medium flow
which is required for measurement. The
membrane materials assure that only
dissolved gases but no liquid-phase
constituents can pass through the membrane.
Dissolved salts and ionic substances are also
held back. This is the reason why - contrary to
the open measuring principle - the
conductivity of the medium does not influence
the measuring signal.
The chlorine dioxide diffusing through the
membrane is reduced to chloride ions at the
gold cathode while silver is oxidised to silver
chloride at the anode. The related electron
release at the cathode and electron
acceptance at the anode cause a current flow
which - under constant conditions - is
proportional to the external concentration of
chlorine dioxide in the medium. Due to this
measuring principle, the chlorine dioxide
measuring cells described here are termed to
be amperometric. The current flow is
converted in the measuring transmitter and
shown on the display as the dissolved
chlorine dioxide concentration in mg/l.
Temperature
Changes in the medium temperature affect
the measuring signal. An increase in
temperature increases the measured value
and lower temperatures result in lower
measured values. The temperature sensor
built into the measuring cell measures the
medium temperature, permitting the
measuring transmitter to perform a
temperature compensation of the measured
value display within the permissible
temperature range.
Free chlorine
Since chlorine dioxide is explosive when
mixed with air, it must be produced directly at
the place of intended use. It can be obtained
by means of two different methods: The
sodium chlorite-hydrochloric acid process
which results in solutions which are practically
free of chlorine, and the sodium
chlorite-chlorine gas method which may also
produce free chlorine besides chlorine
dioxide, depending on the system
parameters. In the second case, the
cross-sensitivity of the chlorine dioxide
measuring cells to free chlorine is approx. 5
% of the DPD 1 value for free chlorine alone at
25 °C and pH 7.2.
5
4.
Installation in flow assemblies
4.
Installation in flow
assemblies
CCS 240 / 241
5.
Start-up and
calibration
4.1 Flow assembly
CCA 250
5.1 Connection to the
measuring transmitter
The flow assembly CCA 250 is intended for
installation of the measuring cell in the field.
This assembly will hold a pH and a redox
electrode in addition to the chlorine dioxide
measuring cell. A needle valve regulates the
flow rate in the range from 30 to 120 l/h. Flow
rates below 30 l/h or total loss of flow can be
detected by installing an inductive proximity
switch (-INS option, order no. 50005179). The
resulting signal can be used to issue an alarm
and disable chlorine dioxide metering if
necessary. The chlorine dioxide measuring
cell is installed in the flow assembly by means
of the union nut (refer to the operating
instructions supplied with the flow assembly
for detailed notes on installation).
Note the following cable assignments when
connecting the measuring cell:
Warning:
When the assembly is operated
under pressure, the
counterpressure on the measuring
cell generated on the outlet side
must not exceed 1 bar and must
remain constant.
4.2
Other flow assemblies
When other assemblies are to be used, a
minimum flow velocity of 15 cm/s at the
membrane must be guaranteed at all times.
The measuring cell is to be installed such that
the medium flows from the bottom to the top
in order to assure removal of air bubbles
contained in the medium, preventing them
from collecting at the membrane. The medium
flow should be directed directly towards the
membrane.
• Transparent wire, designation on sleeve „K“:
gold cathode
• Red wire, designation on sleeve „A“:
silver/silver chloride anode
• Green wire / brown wire:
NTC thermistor detector (polarity does not
matter)
• Wire mesh: outer cable screen
For connection to the measuring transmitter
Mycom CCM 121 (panel-mounted 96 x 96
mm unit), a right-angle BNC connector must
be installed for the gold cathode and silver/
silver chloride anode. The coaxial cable must
be wired as follows:
• Wire inside coaxial cable: gold cathode
• Screen of coaxial cable (not external cable
screen): silver/silver chloride anode
Also refer to the Mycom CCM 121/151
installation and operating instructions within
this context.
5.2 Polarisation
The voltage applied between the cathode and
anode by the measuring transmitter polarises
the cathode surface.
Times required for polarisation:
• First start-up:
30 minutes (CCS 240)
90 minutes (CCS 241)
• Subsequent start-up:
10 minutes (CCS 240)
45 minutes (CCS 241)
Note:
Calibration can only be performed
upon expiration of the periods listed
above.
6
5.
CCS 240 / 241
Start-up and calibration
BE1CS240.CHP
5.3 Reference measurement
according to the DPD
method
5.4 Calibration
The measuring system is calibrated by
performing a colorimetric reference
measurement according to the DPD method.
Chlorine dioxide reacts with
diethyl-p-phenylendiamine by producing a
red colorant, with the intensity of the red
colour being proportional to the chlorine
dioxide concentration.
Simple visual methods employing
comparators are inaccurate and subject to
the wide variation introduced by subjective
evaluation by different persons. Today, the
chlorine dioxide concentration can be
determined objectively and accurately using
economical microprocessor photometers
(order no. CCM 181-1).
Zero adjustments are unnecessary due to the
zero stability of the membrane-covered
measuring cell. Proceed as follows to adjust
the slope (sensitivity):
An important fact which must be kept in mind
for the DPD method is that this is not a
selective measuring method for chlorine
dioxide alone but that other oxidizing agents
present in the medium can also be registered
(see DIN 38408, part 5, section 4). Moreover,
the lower measuring range of the photometers
is limited and does not permit measurement
in the very low trace range. For purposes of
verification, a sample of the medium without
added chlorine dioxide should be subjected
to the DPD measurement if this is possible.
This measurement should produce a
measured value near zero and should differ
significantly from the value obtained for the
sample containing chlorine dioxide.
• Make sure the medium temperature is
constant.
• Take a medium sample from the sampling
cock and read the actual chlorine dioxide
value on the measuring transmitter display.
• Use the photometer to determine the
chlorine dioxide concentration according to
the DPD method.
• Set the measuring transmitter to the DPD
value determined (when there is a
difference from previously read actual
value).
On the Mycom CCM 121/151 measuring
transmitters, the measured value is entered
in matrix position V1 / H1 (also refer to
Mycom installation and operating
instructions).
• Check calibration after several hours or the
next day and repeat if necessary.
Refer to the installation and operating
instructions for the photometer CCM 181-1
with regard to chlorine dioxide content
measurement in the presence of free chlorine.
7
6.
Maintenance
CCS 240 / 241
6.
Maintenance
6.1 Checks and membrane
change
6.3 Storage
The following maintenance work and checks
are to be performed when the measuring cell
is in operation:
When not in use, the measuring cell should
be stored as follows:
• Regular checks of the measurement should
be performed at intervals that depend on
operating conditions but at least once a
month. Recalibrate as necessary. In the
case of visible membrane soiling, remove
the measuring cell from the flow assembly.
Clean the membrane only mechanically
under a light jet of water or chemically by
placing it in 1 – 10 % hydrochloric acid for
a few minutes without adding any other
chemicals. Chemicals that lower the surface
tension are not permissible.
• The electrolyte in the measuring cell should
be replaced or refilled once per season or
every 12 months. This interval may be
longer or shorter depending on the chlorine
dioxide content in the field (procedure as
per section 6.2).
• The membrane must be replaced when
strongly soiled or leaky. For replacement,
first unscrew the measuring chamber and
then the front screw cap (see fig. 3.1).
Replace the membrane cap with spare
cartridge CCY 14-WP and refill the
measuring chamber with electrolyte CCY
24-F as described in section 6.2.
• In the case of short-term interruptions in
operation, the measuring cell can remain in
the flow assembly. In order to prevent the
membrane from drying out, the assembly
must never be empty of medium. If this
cannot be guaranteed, the measuring cell
must be removed from the assembly. To
keep the membrane moist, moisten the
sponge inside the protection cap with
electrolyte and insert the protection cap on
the measuring chamber.
• If the measuring cell will not be in use for an
extended period, in particular if it is likely to
dry out, the measuring cell must be
emptied. To clean, rinse the measuring
chamber and electrode shaft with cold
water and allow to dry. Then screw the
measuring cell closed only loosely (not all
the way to the stop) to leave the membrane
relaxed. Proceed according to section 6.2 to
return the measuring cell to use.
6.2 Filling with electrolyte
The electrolyte filling in the chlorine dioxide
measuring cell is used up slowly during
measurement due to chemical reactions. The
silver chloride coating on the anode applied
at the factory continues to grow during the
operation of the measuring cell. This has no
influence on the reaction taking place at the
cathode.
Proceed as described below to replace the
electrolyte CCY 24-F (see fig. 3.1):
• Unscrew the measuring chamber from the
shaft.
• Hold the measuring chamber at an angle
and fill in electrolyte close to the upper rim.
• Knock the electrolyte-filled chamber against
a plane surface several times to loosen
small air bubbles adhering on the inside
and make them rise.
• Screw the electrode shaft into the
measuring chamber from vertically above,
making sure all the air on the inside is
displaced.
• When the O-ring starts to seal, screw in the
shaft slowly all the way to the stop.
The measuring cell is now ready to operate.
8
7.
Regeneration
Indications for regeneration are sluggish
measured value display and slope
adjustments that can only be performed with
difficulty or not at all. The time intervals
between regeneration depend on the chlorine
dioxide concentration in the medium, where
higher concentrations require more frequent
regeneration. When the measuring cell is
used in water with an average chlorine
dioxide concentration, the measuring cell will
operate properly for many years. If the
measuring cell requires regeneration, it must
be returned to the manufacturer.
8.
CCS 240 / 241
Troubleshooting
BE1CS240.CHP
8.
Troubleshooting
Problems are basically possible in three areas
of the measuring system:
• Measuring transmitter
• Cables and connections
• Chlorine dioxide measuring cell and medium
Measuring transmitter, cable and connection
problems should always be eliminated first.
Problem
No display
Measuring cell does not
respond
Display value too high
In this case, refer to the installation and
operating instructions of the measuring
transmitter for troubleshooting.
If the problem cannot be eliminated, proceed
with the following troubleshooting chart.
Possible cause
Measuring transmitter is not
supplied with power
Remedy
Establish mains connection.
Break in line from the measuring
cell to the measuring transmitter
Establish cable connection.
No electrolyte in measuring
chamber
Fill measuring chamber
(see section 6. 2).
No medium flow
Establish medium flow,
clean filter.
Measuring cell not completely
polarised
Wait for polarisation
to complete (section 5.2).
Membrane defective
Replace membrane cap.
Shunt (e.g., moisture bridge) in the Open measuring chamber. Rub
measuring cell, at the connections gold cathode dry. A shunt
or in the connecting cable
exists if the transmitter display
does not return to zero.
Display value too low
Interference by foreign
oxidizing agents
Check medium, check
chemicals.
Measuring chamber not screwed
all the way tight
Screw on measuring chamber
or screw cap completely.
Membrane soiled
Clean membrane.
Air bubble on outside of membrane Eliminate air bubble.
Display value fluctuates
considerably
Temperature display
too high
too low
Air bubble inside between
cathode and membrane
Open measuring chamber, fill
in some electrolyte, knock.
Medium flow insufficient
Establish required flow rate.
DPD measurement is rendered
inaccurate by foreign oxidizing
agents
Check medium, check
chemicals.
Hole in membrane
Replace membrane cap
External voltage in medium
Disconnect wire from PMC pin
on CCA 250 assembly.
Measure voltage between PMC
pin and protective ground (AC
and DC ranges). Locate
external voltage source and
eliminate if values exceeding a
few volts are measured.
NTC thermistor line:
break
short circuit
Test wires (green/brown) and
measure resistance (NTC),
replace measuring cell if
necessary
9
9.
Technical data
CCS 240 / 241
9.
Technical data
Measuring system
Shaft material
Membrane material
Membrane cap
Cable connection
passively operated measuring cell with gold cathode and
silver/silver chloride anode
PVC
PTFE
exchangeable
low-noise, four-wire cable, length 3 m,
dual screen
transparent, „K“: gold cathode
red, „A“: silver/silver chloride anode
green/brown: NTC thermistor detector
wire mesh: outer screen
Measuring range
Polarisation period (first polarisation):
Subsequent polarisation
Response time after sudden
change in measured value
Minimum flow for CCA 250 assembly
Minimum flow velocity
Permissible temperature range
Maximum counterpressure
Drift
Average life of filling electrolyte
Temperature sensor
CCS 240
CCS 241
0.05 – 20 mg ClO2/l
0.01 – 5.00 mg/l
up to 30 min
up to 90 min
up to 10 min
up to 45 min
90 % < 2 min.
99 % < 5 min.
30 l/h
15 cm/s
2 ... 45 °C
1 bar
< 1.5 % per month
typ. 12 months
NTC
10 kohm at 25 °C
10. Accessories
CCY 14-WP
2 ready-made spare cartridges
for cells CCS 140/141/240/241
Order no. 50005255
CCY 24-F
50 ml filling electrolyte
for cells CCS 240/241
Order no. 50064294
Supplementary documentation
Operating instructions for CCA 250
Flow assembly for chlorine measurement BA 062/07/en
Operating instructions for Mycom CCM 121/151
Chlorine measuring transmitter/controller BA 108C/07/en
10
Europe
Austria
❑ Endress+Hauser Ges.m.b.H.
Wien
Tel. (01) 8 80 56-0, Fax (01) 8 80 56-35
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Belorgsintez
Minsk
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❑ Endress+Hauser S.A./N.V.
Brussels
Tel. (02) 2 48 06 00, Fax (02) 2 48 05 53
Bulgaria
INTERTECH-AUTOMATION
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Tel. (02) 65 28 09, Fax (02) 65 28 09
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❑ Endress+Hauser GmbH+Co.
Zagreb
Tel. (01) 6 60 14 18, Fax (01) 6 60 14 18
Cyprus
I+G Electrical Services Co. Ltd.
Nicosia
Tel. (02) 48 47 88, Fax (02) 48 46 90
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❑ Endress+Hauser GmbH+Co.
Praha
Tel. (0 26) 6 78 42 00, Fax (0 26) 6 78 41 79
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❑ Endress+Hauser A/S
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❑ Endress+Hauser Oy
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Cochabamba
Tel. (0 42) 5 69 93, Fax (0 42) 5 09 81
Papua New Guinea
SBS Electrical Pty Limited
Port Moresby
Tel. 53 25 11 88, Fax 53 25 95 56
Poland
❑ Endress+Hauser Polska Sp. z o.o.
Warszawy
Tel. (0 22) 7 20 10 90, Fax (0 22) 7 20 10 85
Brazil
❑ Samson Endress+Hauser Ltda.
Sao Paulo
Tel. (0 11) 5 36 34 55, Fax (0 11) 5 36 30 67
Philippines
Brenton Industries Inc.
Makati Metro Manila
Tel. (2) 8 43 06 61-5, Fax (2) 8 17 57 39
Portugal
Tecnisis - Tecnica de Sistemas Industriais
Linda-a-Velha
Tel. (01) 4 17 26 37, Fax (01) 4 18 52 78
Canada
❑ Endress+Hauser Ltd.
Burlington, Ontario
Tel. (9 05) 6 81 92 92, Fax (9 05) 6 81 94 44
Singapore
❑ Endress+Hauser (S.E.A.) Pte., Ltd.
Singapore
Tel. 4 68 82 22, Fax 4 66 68 48
Chile
DIN Instrumentos Ltda.
Santiago
Tel. (02) 2 05 01 00, Fax (02) 2 25 81 39
South Korea
❑ Endress+Hauser (Korea) Co., Ltd.
Seoul
Tel. (02) 6 58 72 00, Fax (02) 6 59 28 38
Colombia
Colsein Ltd.
Bogota D.C.
Tel. (01) 2 36 76 59, Fax (01) 6 10 78 68
Taiwan
Kingjarl Corporation
Taipei R.O.C.
Tel. (02) 7 18 39 38, Fax (02) 7 13 41 90
Romania
Romconseng SRL
Bucharest
Tel. (01) 4 10 16 34, Fax (01) 4 10 16 34
Russia
❑ Endress+Hauser Moscow Office
Moscow
Tel., Fax: see Endress+Hauser GmbH+Co.
Instruments International
Slovak Republic
Transcom Technik s.r.o.
Bratislava
Tel. (7) 5 21 31 61, Fax (7) 5 21 31 81
Slovenia
❑ Endress+Hauser D.O.O.
Ljubljana
Tel. (0 61) 1 59 22 17, Fax (0 61) 1 59 22 98
Spain
❑ Endress+Hauser S.A.
Barcelona
Tel. (93) 4 80 33 66, Fax (93) 4 73 38 39
Sweden
❑ Endress+Hauser AB
Sollentuna
Tel. (08) 6 26 16 00, Fax (08) 6 26 94 77
Switzerland
❑ Endress+Hauser AG
Reinach/BL 1
Tel. (0 61) 7 15 75 75, Fax (0 61) 7 11 16 50
France
❑ Endress+Hauser
Huningue
Tel. 89 69 67 68, Fax 89 69 48 02
Turkey
Intek Endüstriyel Ölcü ve Kontrol Sistemleri
Istanbul
Tel. (02 12) 2 75 13 55, Fax (02 12) 2 66 27 75
Germany
❑ Endress+Hauser Meßtechnik GmbH+Co.
Weil am Rhein
Tel. (0 76 21) 9 75-01, Fax (0 76 21) 9 75-5 55
Ukraine
Industria Ukraïna
Kiev
Tel. (44) 2 68 52 13, Fax (44) 2 68 52 13
Great Britain
❑ Endress+Hauser Ltd.
Manchester
Tel. (01 61) 2 86 50 00, Fax (01 61) 9 98 18 41
Yugoslavia
Meris d.o.o.
Beograd
Tel. (11) 4 44 29 66, Fax (11) 43 00 43
Greece
I & G Building Services Automation S.A.
Athens
Tel. (01) 9 24 15 00, Fax (01) 9 22 17 14
Africa
Hungary
Mile Ipari-Elektro
Budapest
Tel. (01) 2 61 55 35, Fax (01) 2 61 55 35
Iceland
Vatnshreinsun HF
Reykjavik
Tel. (05) 88 96 16, Fax (05) 88 96 13
Egypt
Anasia
Heliopolis/Cairo
Tel. (02) 4 17 90 07, Fax (02) 4 17 90 08
Morocco
Oussama S.A.
Casablanca
Tel. (02) 24 13 38, Fax (02) 40 26 57
Ireland
Flomeaco Company Ltd.
Kildare
Tel. (0 45) 86 86 15, Fax (0 45) 86 81 82
Nigeria
J F Technical Invest. Nig. Ltd.
Lagos
Tel. (1) 62 23 45 46, Fax (1) 62 23 45 48
Italy
❑ Endress+Hauser Italia S.p.A.
Cernusco s/N Milano
Tel. (02) 92 10 64 21, Fax (02) 92 10 71 53
South Africa
❑ Endress+Hauser Pty. Ltd.
Sandton
Tel. (0 11) 4 44 13 86, Fax (0 11) 4 44 19 77
Latvia
Raita Ltd.
Riga
Tel. (02) 25 47 95, Fax (02) 7 25 89 33
Lithuania
Agava Ltd.
Kaunas
Tel. (07) 20 24 10, Fax (07) 20 74 14
Netherlands
❑ Endress+Hauser B.V.
Naarden
Tel. (0 35) 6 95 86 11, Fax (0 35) 6 95 88 25
Costa Rica
EURO-TEC S.A.
San Jose
Tel. 2 96 15 42, Fax 2 96 15 42
Thailand
❑ Endress+Hauser Ltd.
Bangkok
Tel. (2) 9 96 78 11-20, Fax (2) 9 96 78 10
Ecuador
Insetec Cia. Ltda.
Quito
Tel. (02) 25 12 42, Fax (02) 46 18 33
Guatemala
ACISA Automatizacion Y Control Industrial S.A.
Ciudad de Guatemala, C.A.
Tel. (02) 34 59 85, Fax (02) 32 74 31
Mexico
❑ Endress+Hauser I.I.
Mexico City
Tel. (5) 5 68 96 58, Fax (5) 5 68 41 83
Paraguay
Incoel S.R.L.
Asuncion
Tel. (0 21) 21 39 89, Fax (0 21) 2 65 83
Uruguay
Circular S.A.
Montevideo
Tel. (02) 92 57 85, Fax (02) 92 91 51
USA
❑ Endress+Hauser Inc.
Greenwood, Indiana
Tel. (3 17) 5 35-71 38, Fax (3 17) 5 35-14 89
Venezuela
H. Z. Instrumentos C.A.
Caracas
Tel. (02) 9 79 88 13, Fax (02) 9 79 96 08
Vietnam
Tan Viet Bao Co. Ltd.
Ho Chi Minh City
Tel. (08) 8 33 52 25, Fax (08) 8 33 52 27
Iran
Telephone Technical Services Co. Ltd.
Tehran
Tel. (0 21) 8 74 67 50, Fax(0 21) 8 73 72 95
Israel
Instrumetrics Industrial Control Ltd.
Tel-Aviv
Tel. (03) 6 48 02 05, Fax (03) 6 47 19 92
Jordan
A.P. Parpas Engineering S.A.
Amman
Tel. (06) 5 53 92 83, Fax (06) 5 53 92 05
Kingdom of Saudi Arabia
Anasia
Jeddah
Tel. (02) 6 71 00 14, Fax (02) 6 72 59 29
Kuwait
Kuwait Maritime & Mercantile Co. K.S.C.
Safat
Tel. 2 43 47 52, Fax 2 44 14 86
Asia
Lebanon
Nabil Ibrahim
Jbeil
Tel. (3) 25 40 51, Fax (9) 94 40 80
China
❑ Endress+Hauser Shanghai
Instrumentation Co. Ltd.
Shanghai
Tel. (0 21) 64 64 67 00, Fax (0 21) 64 74 78 60
Sultanate of Oman
Mustafa & Jawad Science & Industry Co.
L.L.C.
Ruwi
Tel. 60 20 09, Fax 60 70 66
❑ Endress+Hauser Beijing Office
Beijing
Tel. (0 10) 68 34 40 58, Fax: (0 10) 68 34 40 68
United Arab Emirates
Descon Trading EST.
Dubai
Tel. (04) 35 95 22, Fax (04) 35 96 17
Hong Kong
❑ Endress+Hauser (H.K.) Ltd.
Hong Kong
Tel. 25 28 31 20, Fax 28 65 41 71
Yemen
Yemen Company for Ghee and Soap Industry
Taiz
Tel. (04) 23 06 64, Fax (04) 21 23 38
India
❑ Endress+Hauser India Branch Office
Mumbai
Tel. (0 22) 6 04 55 78, Fax (0 22) 6 04 02 11
Australia + New Zealand
Indonesia
PT Grama Bazita
Jakarta
Tel. (21) 7 97 50 83, Fax (21) 7 97 50 89
Australia
GEC Alsthom LTD.
Sydney
Tel. (02) 96 45 07 77, Fax (02) 97 43 70 35
Tunisia
Controle, Maintenance et Regulation
Tunis
Tel. (01) 79 30 77, Fax (01) 78 85 95
Japan
❑ Sakura Endress Co., Ltd.
Tokyo
Tel. (04 22) 54 06 11, Fax (04 22) 55 02 75
New Zealand
EMC Industrial Instrumentation
Auckland
Tel. (09) 4 44 92 29, Fax (09) 4 44 11 45
America
Malaysia
❑ Endress+Hauser (M) Sdn. Bhd.
Petaling Jaya, Selangor Darul Ehsan
Tel. (03) 7 33 48 48, Fax (03) 7 33 88 00
All other countries
Argentina
❑ Endress+Hauser Argentina S.A.
Buenos Aires
Tel. (01) 54 11 45 22 79 70,
Fax (01) 54 11 45 22 79 09
Pakistan
Speedy Automation
Karachi
Tel. (0 21) 7 72 29 53, Fax (0 21) 7 73 68 84
❑ Endress+Hauser GmbH+Co.
Instruments International
D-Weil am Rhein
Germany
Tel. (0 76 21) 9 75-02, Fax (0 76 21) 97 53 45
❑ Members of the Endress+Hauser group
Endress + Hauser
50074196
BA 114C/07/en/04.95
Printed in Germany / CV5
Nothing beats know-how