Conductivity
Conductivity
Meters
Meters
Handheld conductivity meters
Conductivity cells
Portable conductivity meters
Accessories
Laboratory conductivity meters
Electrical Conductivity
The conductivity is a cumulative parameter for the ionic concentration of a
solution. The more salt, acid or alkali in
a solution, the greater its conductivity.
The unit of conductivity is S/cm. The
scale for aqueous solutions begins with
pure water at a conductivity of
0.05 µS/cm (25°C). Naturally occurring
waters such as drinking water or surface
water have a conductivity in the range
100 - 1000 µS/cm. The upper end of the
scale is reached by some bases such as
potassium hydroxide solutions with a
conductivity of just over 1000 mS/cm.
Conductivity of aqueous solutions
µS/cm
0,1
mS/cm
1
10
100
1
10
100
1000
Feedwater for high-pressure boilers
Fully deionized water (ion exchanger)
Deionized water
Drinking water
Wastewater
Surface water
Brackish water, sea water
In practice conductivity measurements
are used for applications such as monitoring plants in which ultrapure water is
produced and determining the salinity of
sea water.
Industrial process water
Concentrated acids and bases
Conductivity is measured by making a
measurement of the electrical resistance. The simplest kind of measuring cell used
consists of two similar electrodes. An alternating voltage applied to one of the
electrodes causes the ions in the solution to migrate towards the electrodes. The
more ions in the solution, the greater the current which flows between the
electrodes. The instrument measures the current and uses Ohm's law to calculate
first the conductance of the solution and then - by taken the cell data into account
- the conductivity.
Literature
76
Further information on this subject can
be requested from WTW:
Application reports
Offprints
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
Laboratory
&
Field
ORP
pH
General
Features
Conductivity Meters
ISE
Conductivity meters for every application
Quality in a set of three
- Simple to use
- Proven with memory function
- All-rounder with interface
Portable
conductivity meters
Classic
82
robust, shockproof, waterproof, portable,
conductivity measurement at depths down to 100 m
Laboratory
conductivity meters
inoLab® – top quality in 3 stages
- Simple and reliable
- Compact and communicative
- Flexible and powerful
Portable conductivity meters
Conductivity meter accessories
❍ Flow-thru cells
❍ Stands and cell holders
❍ Calibration and testing agents
For documentation
Software, printer and accessories
Further instruments for conductivity measurement
BOD
94
94
95
180
from page
96
Software,
Printers
Turbidity
Multi-parameter instruments
88
89
89
Respiration
Sample
Preparation
❍ Standard cells
❍ Special cells
84
Colony
Counter
Conductivity cells
78
Conductivity
Handheld
conductivity meters
MultiParameter
from page
Photometry
Model
Oxygen
(D.O.)
Handheld conductivity meters
Customer
Service
Laboratory conductivity meters
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
77
General Information
about handheld conductivity meters
can be found on pages 14 - 17.
Conductivity
Handheld
Conductivity
Meters Meters
Cond 315i, Cond 330i and Cond 340i
NEW
Features
Handy
Dust- and waterproof
Easy to use
GLP-conform
Low-power system
allows continuous
operation for up
to 2500 h
Pocket-size precision
Universal conductivity meters with large multifunction display
for measurement of conductivity, temperature, salinity and total
dissolved solids. With the proven dirt-insensitive Tetracon®
4-electrode system they offer the highest degree of precision
and operating comfort.
Long
usability
Complete in SET
78
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
General
Features
Cond 315i, Cond 330i, Cond 340i
Laboratory
&
Field
Handheld Conductivity Meters
ISE
ORP
pH
handy · waterproof · GLP-conform
Oxygen
(D.O.)
Cond 315i:
MultiParameter
Conductivity
The simple conductivity meter for meeting higher
demands. With only 5 keys for error-free measurement
with parallel temperature measurement, automatic
temperature compensation, 4-electrode measuring
technology
Cond 330i:
Respiration
Sample
Preparation
BOD
Robust and waterproof handheld conductivity meter
for battery operation; with parallel temperature
display, integrated datalogger, GLP supporting
functions, automatic and manual temperature
compensation with linear temperature function and
non-linear function for ultrapure water and natural
waters according to DIN 38 404 and EN 27 888.
The temperature compensation can be switched off;
either 20 °C or 25 °C can be selected as the reference
temperature
Colony
Counter
Cond 340i:
Photometry
As Cond 330i, but with additional analog and digital
RS 232 output and optional mains power supply
IP 66
IP 67
3 Year
Warranty
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
Customer
Service
Software,
Printers
Turbidity
Cond 315i
79
SET Equipment
SET equipment
for Cond 315i, Cond 330i and Cond 340i
• Professional case with built-in measuring set-up
and separate compartment
for measuring cell and accessories
• Conductivity meter with batteries
• Measuring cell as chosen
• KCl solution 0.01 mol/l for system checks
• Stand and measuring beaker
• Plug-in power supply (only Cond 340i)
• Operating instructions
Each handheld conductivity meter
is available in a complete
equipment set
Technical Data
Model
Cond 315i
Measuring range/
resolution
Conductivity
Accuracy
(±1 digit)
Cond 330i
Cond 340i
0.0 µS/cm … 500 mS/cm
in 5 ranges or AutoRange
0.00 µS/cm ... 19.99 µS/cm (for K=0.1 cm-1)
0.000 µS/cm ... 1.999 µS/cm (for K=0.01 cm-1)
Temperature
Salinity
TDS
Resistivity
0.0 µS/cm … 500 mS/cm
with 5 ranges
in AutoRange
0.00 µS/cm ... 19.99 µS/cm
(for K=0.1 cm-1)
-5.0 °C ... +105.0 °C
0.0 … 70.0
–
0.00 ... 1999 MΩcm
Conductivity
Temperature
±0,5 % of value
±0.1 K
±0.5 % of value
±0.1 K
Ref. temperature Tref 25 °C
-5.0 °C … +105.0 °C
0.0 … 70.0
0 … 1999 mg/l
0.000 ... 1999 MΩcm
20 or 25 °C, selectable
Cell constant
Fixed 0.475 cm-1, 0.1 cm-1
0.475 cm-1 0.1 cm-1 and 0.01 cm-1 fixed and
0.25 ... 2.5 cm-1 and 0.09 ... 0.11 cm-1 adjustable
Temperature
compensation
Automatic, can be switched off
Automatic, can be switched off
Temperaturecoefficient
• Non-linear function for natural waters (nLF)
to EN 27 888 (DIN 38 404) and
ultrapure water function
• No compensation
• Non-linear function for natural waters (nLF)
to EN 27 888 (DIN 38 404) and ultrapure water function
• Linear compensation from 0.01 ... 2.99%/K
• No compensation
Display
LCD display 60 x 45 mm visible area, simultaneous display of measurement, temperature and special characters
Data storage
–
Data output
Via display
Via display or interface
Interface
–
Self-configuring analog output
0 ... 2 V corresponding to display,
or RS 232 bi-directional interface
Operating time
Mains operation
–
Continuous operation from mains supply
500 data sets (measurement, temperature, date/time, identity no.);
time-controlled storage at 7 intervals
5 s ... 60 min, non-volatile data storage
Battery operation = 500 ... 2500 h* with 4 x 1.5 V batteries with AutoSwitchOff after 1 h (except logger operation)
*depending on conductivity
80
Protection type
IP 66 and IP 67 to IEC 529
Dimensions
172 x 80 x 37 mm (H x B x D)
Weight
Approx. 300 g
Certified to
CE, TÜV/GS, UL and/or cETLus, CUL
Warranty
3 years for the instrument
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
Robust and waterproof battery-operated handheld conductivity meter
2C10-000
Cond 330i
Robust and waterproof battery-operated handheld conductivity meter with datalogger
2C20-000
Cond 340i
Robust and waterproof battery-operated handheld conductivity meter with datalogger
and serial interface
2C30-000
Cond 340i
Robust and waterproof handheld conductivity meter with datalogger and serial interface,
for mains operation
2C30-010
Ordering Information SETs
Order No.
Cond 315i
Handheld conductivity meter, including conductivity cell, professional case and accessories
2C10-001
Cond 330i
Handheld conductivity meter, including conductivity cell, professional case and accessories
2C20-001
Cond 340i
Handheld conductivity meter, including conductivity cell, professional case and accessories
2C30-001
Cond 340i
Handheld conductivity meter with mains power supply, including conductivity cell, professional case and accessories2C30-011
Laboratory
&
Field
Photometry
Handheld Conductivity Meters SETs
BOD
Order No.
Cond 315i
Respiration
Sample
Preparation
Handheld Conductivity Meters
Colony
Counter
Ordering Information
MultiParameter
Conductivity
Oxygen
(D.O.)
ISE
ORP
Conductivity measuring kit
according to USP 24, with stainless
steel flow-thru vessel for pharmaceutical
water (see page 95).
pH
General
Features
Handheld Conductivity Meters
4-electrode conductivity measuring cell
4-electrode conductivity measuring cell with 3 m cable
Ultrapure water conductivity cell
SET ordering example Cond 330i + TetraCon® 325-3 conductivity cell
1
2
4
2C20-001
2
Please refer to page 88 for conductivity cells and page 94 ff. for other accessories
Customer
Service
Note: Other conductivity cells in SET and instrument versions for 120 VAC/60 Hz are available on request
Software,
Printers
TetraCon® 325
TetraCon® 325-3
LR 325/01
Turbidity
Conductivity cells – please select one
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
81
General Information
about portable conductivity meters
can be found on pages 18 - 19.
Conductivity
Portable
Conductivity
MetersMeters
ProfiLine LF 197 and ProfiLine LF 197-S
Features
Robust
Shockproof
Waterproof
Portable
Reliable
Standard conductivity
measurement and conductivity measurement
at depths down to
100 m
82
WTW portable conductivity meters
The WTW conductivity meters of the ProfiLine LF 197 series are both hose-proof
(IP 66) and submersible (IP 67).
They convince because of their high degree of operator comfort and foolproof
operator guidance via the large multifunctional display. They are equipped with a
carrying/support handle and carrying strap as standard.
The portable conductivity meters are available in 2 versions:
ProfiLine LF 197:
ProfiLine conductivity meter, extremely
robust, hose-proof (IP 66) and submersible (IP 67), for connection of TetraCon®
325 4-electrode measuring cells and
depth armature TA 197 LF with up to
100 m cable, with large multifunctional
display for temperature and measurement, automatic temperature compensation, selectable reference temperature
of 20 °C or 25 °C, built-in memory, TDS
and salinity measurements, RS 232 digital
IP 66
IP 67
output, integrated carrying and support
handle, built-in electrode storage sleeve,
for rechargeable battery and mains
operation, and including plug-in power
supply and carrying strap
ProfiLine LF 197-S:
As ProfiLine LF 197 but with 2 analog
outputs corresponding to display for
conductivity and temperature values
3 Year
Warranty
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
Laboratory
&
Field
General
Features
Portable Conductivity Meters
Accessories for conductivity measurement at depths down to 100 m
ORP
pH
Conductivity depth armature TA 197 LF with built-in temperature sensor, up to
100 m cable with waterproof plug (IP 67), pressure-resistant steel armoring
(material VA 1.4571) with screw-off protective hood, pressure-resistant to max.
10 bar, fits into 2" boreholes
Conductivity
Temperature
Salinity
TDS
0.0 µS/cm ... 500 mS/cm in 5 ranges, additional 0.00 .. 19.99 µS/cm (at K=0.1 cm-1)
-5.0 ... 99.9 °C/ ±0.1 K
0.0 ... 70.00
0 ... 1999 mg/l
ProfiLine LF 197-S
Accuracy
(± 1 digit)
Conductivity
Temperature
±0.5% of value
±0.1 K
Ref. temperature
20 °C or 25 °C, selectable
Cell constant
0.1 cm-1 fixed and
0.45 ... 1.30 cm-1, adjustable
Temperature
compensation
Automatic or manual
Temperature
coefficient
• Non-linear function for natural waters to EN 27 888 (DIN 38 404)
• Linear compensation from 0.50 ... 3.00 %/K
• No compensation
Display
LCD display 60 x 35 mm visible area, simultaneous display of measurement, temperature, special characters
Data storage
Ring memory for 50 pairs of measurements (measurement, temperature) with data protection
Data output
Via display or interface
Interface
Unidirectional RS 232 interface
Operating time
Continuous operation from plug-in mains supply;
or 150 ... 800 hours with rechargeable batteries (depends on conductivity) with AutoSwitchOff after 1 h
Protection type
IP 66 and IP 67 to IEC 529
Dimensions
230 x 185 x 90 mm (B x D x H)
Weight
Approx. 1.5 kg
Certified to
CE, TÜV/GS, UL, CUL
Warranty
3 years for the instrument
Oxygen
(D.O.)
ProfiLine LF 197
Measuring range/
resolution
BOD
MultiParameter
Conductivity
Model
ISE
Technical Data
Portable conductivity meters
Order No.
ProfiLine LF 197
Robust, waterproof, submersible conductivity meter
300 350
ProfiLine LF 197-S
As ProfiLine LF 197, but additionally with 2 analog recorder outputs
300 351
Note: 120 VAC / 60 Hz versions on request
Turbidity
Ordering Information
Photometry
Colony
Counter
Respiration
Sample
Preparation
Unidirectional RS 232 interface
2 analog recorder outputs for measurement
and temperature output corresponding to display
4-electrode conductivity depth armatures with built-in temperature sensors, cable (length optional) with waterproof plug (IP 67),
VA 1.4571 steel armoring and screw-off protective hood, pressure resistant to max. 10 bar, fits into 2” boreholes
Cable length
Order No.
Cable length
Order No.
25 m
301 980
TA 197 LF-60
60 m
301 982
TA 197 LF-40
40 m
301 981
TA 197 LF-100
100 m
301 983
Please refer to page 88 for conductivity cells and page 94 ff. for other accessories
Customer
Service
TA 197 LF-25
Software,
Printers
Depth armatures for conductivity measurements with ProfiLine LF 197 and ProfiLine LF 197-S
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
83
General Information
about inoLab® laboratory
instruments can be found
on pages 20 - 25.
Conductivity
Laboratory
Conductivity
Meters
Meters
inoLab® Cond Level 1, inoLab® Cond Level 2, inoLab® Cond Level 3
inoLab® Level 1
Think
innovative
inoLab® Cond Level 1:
simple and reliable
Features
Performance-oriented
instrument range
Simplified operator
convenience
Mainsindependent
Suitable as bench and
wall-mounted models
Country-specific
units
ISO-conform
documentation
Application-oriented
displays
84
Routine laboratory conductivity meter
with large multifunctional display, parallel
temperature display and automatic temperature compensation.
20 °C or 25 °C can be set as reference
temperature. Both TDS and salinity measurements are possible as well as conductivity and temperature. The ability to
set different cell constants means that
other special conductivity cells can be
connected as well as the TetraCon® 325
4-electrode conductivity cell and LR
325/01 ultrapure water conductivity cell
(see page 93).
inoLab® Level 2
inoLab® Cond Level 2:
compact and communicative
Standard laboratory conductivity meter
with large multifunctional display, parallel
temperature display and automatic temperature compensation. An integral measurement store with logger function and
a real-time clock allow QA-conform data
acquisition. The optional built-in printer
allows data printout on thermal paper
accepted for use in official documents.
20 °C or 25 °C can be set as reference
temperature. Both TDS and salinity measurements are possible as well as conductivity and temperature. The ability to set
different cell constants means that other
special conductivity cells can be connected as well as the TetraCon® 325 4electrode conductivity cell and LR 325/01
ultrapure water conductivity cell
(see page 93).
IP 43
MultiCal®
automatic
calibration
AutoRead
automatic drift
control for stable
and reproducible
measurements
See
innovative
Feed and
on/off keys
keys for controlling the built-in
printer
3 Year
Warranty
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
General
Features
Touch
innovative
inoLab® Level 3
Laboratory
&
Field
Laboratory Conductivity Meters
pH
inoLab® Cond Level 3 with Teminal Level 3
or PC software: flexible and powerful
ORP
High-performance laboratory conductivity meter with graphics display and digital
recorder function, parallel display of temperature and automatic temperature compensation. An integral measurement store with logger function and a real-time
clock allow QA-conform data acquisition. The optional built-in printer allows data
printout on thermal paper accepted for use in official documents.
Oxygen
(D.O.)
ISE
20 °C or 25 °C can be set as reference temperature. Both TDS and salinity measurements are possible as well as conductivity and temperature. The ability to set different
cell constants means that other special conductivity cells can be connected as well
as the TetraCon® 325 4-electrode conductivity cell and LR 325/01 ultrapure water
conductivity cell (see page 93).
Automatic memory function if bar-code reader
is used
AutoRead
automatic drift control for
stable and reproducible
measurements
RUN/ENTER
triggers the
measuring
process
IP 43
Selectable instrument
language
Extended
GLP functions
Limit input with
acoustic alarm
Meets all the requirements of USP 24
3 Year
Warranty
Free-of-charge software
downloads for inoLab®
pilot or terminal
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
BOD
Respiration
Sample
Preparation
Colony
Counter
Connection of bar-code
reader or PC keyboard
Photometry
Graphic evaluation
possible
Turbidity
Built-in
digital plotter
Software,
Printers
Features
Customer
Service
Terminal Level 3
MultiParameter
Conductivity
An PC keyboard interface allows an external keyboard or a barcode reader to be
connected.
85
Technical Data for laboratory conductivity meters
Modelle
Cond Level 1
Range/
Resolution
Conductivity
Cond Level 2
Cond Level 3
Temperature
Salinity
TDS:
Resistivity:
0.0 µS/cm ... 500 mS/cm
in 5 measuring ranges or AutoRange
additionally for
K = 0.1 cm-1: 0.00 µS/cm ... 19.99 µS/cm
K = 0.01 cm-1: 0.000 µS/cm ... 1.999 µS/cm
-5.0 ... +99.9 °C
0.0 ... 70.0
0 ... 1999 mg/l
0.000 ... 1999 MΩcm
Accuracy
(±1 digit)
Conductivity
Temperature
±0.5% of value
±0.1 K
Reference
temperature
20 °C or 25 °C, selectable
Cell constants
0.475 cm-1, 0.1 cm-1 and 0.01 cm-1 fixed, freely selectable 0.25 ... 2.5 cm-1 and 0.09 ... 0.11 cm-1
Temperature
compensation
Automatic, manual or switched off
Temperature
coefficient
• Non-linear function for natural water to EN 27 888 (DIN 38 404)
• Linear compensation from 0.001 ... 2.999%/K
• No compensation
Calibration
With 0.01 mol KCl
Real-time clock
–
Non-volatile
Data memory
–
200 records
(measurement, temperature)
date/time, ident. no., time-controlled
storage interval 5 s ... 60 min
2000 records
(measurement, temperature)
date/time, ident. no., time-controlled
storage interval 1 s ... 60 days
Data output
Display
Display or interface
Display, PC or interface
Analog interface
–
Self-configuring as analog output corresponding to display or as
RS 232 bidirectional interface
Digital interface
–
RS 232 bidirectional interface
Operating time/
Energy supply
2500 h with 4 x 1.5 V standard batteries
or mains supply
Protection type
IEC 529 / IP 43 without built-in printer
Dimensions
(B x D x H in mm)
230 x 210 x 70
300 x 250 x 70
300 x 250 x 70
Weight
Approx. 1.3 kg
Approx. 1.6 kg
Approx. 1.6 kg
Certified to
CE, TÜV/GS, UL, CUL
Warranty
3 years for the instrument
With terminal: universal plug-in power
supply 230 VAC or 120 VAC
Without terminal: via PC interface
86
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
Laboratory
&
Field
ORP
pH
General
Features
Laboratory Conductivity Meters
1C20-010
inoLab® Cond Level 2 Compact precision conductometer with additional
built-in printer for GLP-conform documentation
1C21-010
inoLab® Cond Level 3 Flexible and powerful precision – the intelligent conductivity measuring place
consisting of multifunction box and universal terminal, with PC software/connection cable
1C30-010
1C31-010
inoLab® Cond Level 3 The integrated conductivity measuring place with PC software/connection cable; without printer/terminal
1C32-000
MultiParameter
inoLab® Cond Level 3 The intelligent conductivity measuring place with additional built-in printer
1C10-011
inoLab® Cond Level 2
Including cell, passive multifunction box and accessories
1C20-011
inoLab® Cond Level 2
Including built-in printer, cell, passive multifunction box and accessories
1C21-011
inoLab® Cond Level 3
Including terminal, cell and accessories
1C30-011
inoLab® Cond Level 3
With built-in printer, including terminal, cell and accessories
inoLab® Cond Level 3 Without printer/terminal, with PC software/connection cable, cell and accessories
1C31-011
1C32-001
Conductivity cells – please select one
TetraCon® 325
TetraCon® 325-3
LR 325/01
4-electrode conductivity measuring cell
4-electrode conductivity measuring cell with 3 m cable
Ultrapure water conductivity cell
SET ordering example inoLab® Cond Level 1 + conductivity measuring cell LR 325/01
1
2
4
1C10-011
4
Note: Other measuring cells in SET and instrument versions for 120 VAC/60 Hz are available on request
Customer
Service
Software,
Printers
Turbidity
Please refer to page 88 for conductivity cells and page 94 ff. for other accessories
Respiration
Sample
Preparation
Including cell, passive multifunction box and accessories
Colony
Counter
Order No.
inoLab® Cond Level 1
BOD
Ordering Information for inoLab® conductivity meters SETs – “ready to go”
inoLab® Cond SETs
Oxygen
(D.O.)
1C10-010
inoLab® Cond Level 2 Compact precision conductometer with serial interface
Conductivity
Order No.
inoLab® Cond Level 1 Simple and reliable conductometer for routine work
Photometry
inoLab® laboratory conductometers
ISE
Ordering Information for inoLab® conductivity meters
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
87
Conductivity
Conductivity cells
Meters
TetraCon®
TetraCon® conductivity cells
For more than 50 years WTW has been one of the leading manufacturers worldwide
of precision conductivity meters and cells.
The TetraCon® 4-electrode system is the perfect result of a logical, practice-oriented
further development and sets a new standard for professional conductivity
measurements.
In comparison with conventional measuring cells with 2 electrodes, the TetraCon®
conductivity cell offers numerous technical advantages:
• Highest degree of precision and linearity by optimized cell geometry
• Extremely large measuring range with just one cell
• Long-term cell constant stability with high-quality abrasion-resistant graphite
electrodes
• With built-in temperature sensor as standard
• Smallest immersion depth possible
• Ideal sample exchange – no dead volume
• No measuring errors even with very dirty electrode – contact resistance on the
electrode surface is automatically compensated
• No measuring errors from cable influences
• No measuring errors from primary or secondary polarization effects
• No measuring errors from alteration to the electrical marginal field during contact
with base or side walls
• No danger of breakage owing to robust epoxy casting technique
Special conductivity depth armatures for
ProfiLine LF 197 and ProfiLine LF 197-S
can be found on page 83
88
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
4-electrode cell made of glass
with built-in temperature
sensor. For universal use, even
in partially aqueous or highly
aggressive media.
4-electrode cell with built-in
temperature sensor for measurements in pastes, creams and
emulsions
With built-in temperature sensor
and flow-thru vessel D 01/T for
the measurement of small
conductivities (<1 µS/cm), e.g.
boiler feed water or deionized
water.
Electrode material
graphite
Shaft material
epoxy
Shaft length
120 mm
Cell constant
K = 0.475 cm-1
Diameter
15.3 mm
Cable length
1.5 m
Measuring range
1 µS/cm ... 2 S/cm*
Temperature range 0 ... 90 °C
Electrode material
platinum
Shaft length
120 mm
Cell constant K approx. 1 cm-1
Diameter
20 mm
Cable length
1.5 m
Measuring range
1 µS/cm ... 1 S/cm*
Electrode material
graphite
Shaft material
epoxy
Shaft length
120 mm
Cell constant
K = 0.491 cm-1
Diameter
15.3 mm
Cable length
1.5 m
Measuring range
1 µS/cm ... 2 S/cm*
Electrode material
V4A steel
Shaft material
V4A steel
Shaft length
120 mm
Cell constant
K = 0.1 cm-1
Diameter
12 mm
Cable length
1.5 m
Min./max. immersion depth
35/110 mm
and flow-thru measurements
Measuring range
0.001 µS/cm ... 300 µS/cm
* Measuring range depends on particular instrument
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
Laboratory
&
Field
Colony
Counter
4-electrode cell with built-in
temperature sensor
Photometry
Ultrapure water conductivity cell LR 325/01
Turbidity
Special conductivity cell
TetraCon® 325/S
Software,
Printers
Special conductivity cell
TetraCon® 325/Pt
Customer
Service
Standard conductivity cell
TetraCon® 325
Respiration
Sample
Preparation
BOD
MultiParameter
Conductivity
Oxygen
(D.O.)
ISE
ORP
pH
General
Features
Conductivity Cells
89
Trace conductivity cell
LR 325/001
With built-in temperature sensor
and flow-thru vessel for the
measurement of conductivity
and resistance in boiler feed
water or deionized water as well
as in partially aqueous and nonaqueous media.
Flow-thru vessel
Electrode material
Shaft material
Shaft length
Cell constant
K=
V4A steel
V4A steel
V4A steel
120 mm
0.01 cm-1
Conductivity flow-thru cell
TetraCon® DU/T
Conductivity measuring
cell LDM
4-electrode cell with built-in
temperature sensor for standard
applications in laboratories and
production. Connection via
10 mm dia. hose nozzles.
For small sample volumes with
injection syringe for sampling
Electrode material
graphite
Shaft material
epoxy
Length
155 mm
Filling volume
7 ml
Cell constant
K = 0.778 cm-1
Measuring range
1 µS/cm ... 2 S/cm*
Adapter cable KKDU 325, length
1 m, is necessary for the
connection.
Cell constant
K approx. 150 cm-1
Dialysis conductivity cell
TetraCon® DU/TH
Conductivity flow-thru cell
LDM/S
As TetraCon‚ DU/T, but for
dialyzers with connectors
to DIN 58 352 (Hansen
connectors).
For column chromatography or
minute sample volumes.
Adapter cable KKDU 325, length
1 m, is necessary for the
connection.
Cell constant K approx. 15 cm-1
Adapter cable K-LDM with
built-in 30 kΩ fixed resistor is
necessary for the connection.
Volume
Temperature
approx. 4 ml
0 ... 90 °C
Diameter
20 mm
Cable length
1.5 m
Min./max. immersion depth
35/110 mm
and flow-thru measurements
Measuring range
0.0001 µS/cm ... 30 µS/cm
90
* Measuring range depends on particular instrument
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
Laboratory
&
Field
pH
General
Features
Selection Guide
ORP
2
2
2
2
2
2
2
2
2
●
●
●
5
5
5
5
5
5
5
5
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
BOD
●
●
●
●
4
4
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
●
●
●
●
●
●*
●
●
●
●
4
4
4
4
5
5
5
5
●
●
4
4
4
4
4
4
4
4
5
5
5
5
●
●
●
4
4
4
4
4
4
4
4
Adapter (possible conversion with cell constants) is required:
Adapter cable KLF 10
Adapter cable K/LTA together with temperature sensor TFK 325 or TFK 150
Adapter cable K/LDM
Connection cable KKDU
Connection cable KKDU 325
* not for Cond 315i
Customer
Service
Software,
Printers
Turbidity
1
2
3
4
5
Respiration
Sample
Preparation
●
Colony
Counter
●
●
Photometry
●
MultiParameter
3
3
●
ISE
2
2
2
Oxygen
(D.O.)
1
1
1
1
1
1
1
Conductivity
LF 597
●
●
●
LF 197
●
2
2
2
2
2
2
2
2
2
LF 196
2
2
2
●
●
●
●
●
●
●
●
●
●
●
MultiLine® P3 pH/LF,
pH/Cond 340i
2
2
2
●
●
●
●
●
●
●
●
●
●
●
MultiLine® P4,
Multi 340i
2
2
2
2
2
2
MultiLab® P4/P5
2
2
2
●
●
●
●
●
●
●
●
MultiLab® 540
2
2
2
LF 3000
2
2
2
LF 539
inoLab® Cond,
pH/Cond, Multi
2
2
2
LF 538
Cond 315i/330i/340i
2
2
2
LF 537
LF 330/340A
LF 318
LF 315
LF 96
1
1
1
1
1
1
1
LF 320/323/325
LTA
LTA 1
LTA 01
LTA 10
LTA 100
LTA/S
LTA/KS
LR 01/T
LR 001/T
LDM
LDM/S
KLE 1
●
KLE 1/T
KLE 315
TetraCon® 96
TetraCon® 96-1,5
TetraCon® 96-ATetraCon® 96 A-4
TetraCon® 96-T-100 m
TetraCon® 325
TA 197 LF
TetraCon® L
TetraCon® 325/Pt
TetraCon® DU/T
TetraCon® DU/TH
KDU 1/T
KDU 1/TH
LR 325/01
LR 325/001
TetraCon® 325/S
LF 95
Measuring cell
LF 90
Selection Guide
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
91
Ordering Information
Standard conductivity cells
Order No.
KLE 315
2-electrode conductivity cell with 1.5 m cable and waterproof plug
301 965
TetraCon® 325
4-electrode conductivity cell with built-in temperature sensor, K = 0.475 cm-1
with waterproof plug (IP 68) and 1.5 m cable
301 960
TetraCon® 325-3
As TetraCon®‚ 325, but cable length 3 m
301 970
LTA 1
Glass/platinum 2-electrode conductivity cell, K approx. 1 cm-1
(adapter cable K/LTA required)
301 310
LTA 100
Glass/platinum 2-electrode conductivity cell with adjustable cell constant, K = 1 cm-1
(adapter cable K/LTA required)
301 200
TetraCon® 96
4-electrode conductivity cell with built-in temperature sensor,
K = 0.609 cm-1, 1 m cable
301 244
TetraCon® L
Glass/platinum 4-electrode conductivity cell with built-in temperature sensor,
K approx. 1.0 cm-1, for universal use, even in partially aqueous or highly
aggressive inorganic media.
301 255
TetraCon® 325/Pt
Glass/platinum 4-electrode conductivity cell with built-in temperature sensor;
can also be used in partially aqueous or highly aggressive solutions, K approx. 1 cm-1
301 964
For conductivity measurements at depths down to 20 m
TetraCon® 325-6
As TetraCon® 325, but cable length 6 m
301 971
TetraCon®
325-10
As TetraCon® 325, but cable length 10 m
301 972
TetraCon® 325-15
As TetraCon® 325, but cable length 15 m
301 973
TetraCon® 325-20
As TetraCon® 325, but cable length 20 m
301 974
Suitable accessories
A 325/K
Plastic armoring with protective hood
903 830
A 325/S
Steel armoring with stainless steel protective hood, material no. 1.4571
903 831
For conductivity measurements at depths down to 100 m
TA 197 LF-25
4-electrode conductivity depth cell with built-in temperature sensor, 25 m
cable with waterproof plug (IP 68), pressure resistant steel armoring and
screw-off protective hood, fits into 2” boreholes
301 980
TA 197 LF-40
As TA 197 LF-25, but with 40 m cable
301 981
TA 197 LF-60
As TA 197 LF-25, but with 60 m cable
301 982
TA 197 LF-100
As TA 197 LF-25, but with 100 m cable
301 983
Ordering Information
Flow-thru conductivity cells
Order No.
TetraCon® DU/T
Flow-thru cell with built-in temperature sensor for all standard
applications in laboratories and production, connection via 10 mm dia.
hose nozzles, K = 0.778 cm-1, without cable
301 252
TetraCon® DU/TH
Flow-thru cell with built-in temperature sensor for checking dialyzers,
connection via DIN 58 352 “Hansen connectors”,
K = 0.778 cm-1, without cable
301 254
LDM/S
Conductivity flow-thru cell for column chromatography or minute sample
volumes, K = approx. 15 cm-1
301 750
KDU 1/T
Conductivity flow-thru cell with built-in temperature sensor, for all
standard applications in laboratories and production, connection via
10 mm dia. hose nozzles, K approx. 0. 8 cm-1, without cable
301 530
KDU 1/TH
Flow-thru cell with built-in temperature sensor for checking dialyzers,
connection via DIN 58 352 “Hansen connectors”, K approx. 0. 8 cm-1,
without cable
301 535
92
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
General
Features
Ordering Information
Laboratory
&
Field
Conductivity Cells
Conductivity cells for special applications
Pure and ultrapure water measurements
LTA 01
Glass/platinum 2-electrode conductivity cell for ultrapure water, K approx. 0.1 cm-1
301 410
LR 01/T
Ultrapure water cell with built-in temperature sensor, with flow-thru vessel
D 01/T as standard, K = 0.100 cm-1, with 1.5 m cable and waterproof plug
302 520
LR 001/T
Trace conductivity cell with built-in temperature sensor and flow-thru vessel
for the measurement of conductivity in boiler feed water or deionized water
as well as in partially aqueous and non-aqueous media, K = 0.0100 cm-1, with 1.5 m cable
302 530
LR 325/001
Trace conductivity cell with built-in temperature sensor and flow-thru vessel for
the measurement of conductivity in boiler feed water or deionized water as well as in
partially aqueous and non-aqueous media, K = 0.0100 cm-1, cable with waterproof plug
301 962
pH
301 961
ORP
Ultrapure water cell with built-in temperature sensor, K = 0.100 cm-1,
with flow-thru vessel D 01/T and waterproof plug
ISE
LR 325/01
301 603
Special applications
LDM
Conductivity measuring cell for small sample volumes with injection syringe
for sampling, K = approx. 150 cm-1, without cable
301 700
LTA 10
Glass/platinum 2-electrode conductivity cell for extremely high conductivity values, K approx. 10 cm-1
301 112
LTA
Glass/platinum 2-electrode conductivity cell with special length,
suitable for measurements in test tubes (13 mm dia.), K = approx. 1 cm-1
301 100
Connection cables and accessories
KLF 10
Adapter cable for connection of 2-electrode conductivity cell and TFK 530
303 224
K/LTA
Adapter cable for connection of 2-electrode conductivity cell and TFK 325
or TFK 150
301 429
K-LDM
Adapter cable with built-in 30 kohm fixed resistor, length 1 m
301 430
KKDU
Connection cable with 1 m cable
301 532
KKDU 325
Connection cable with waterproof plug and 1 m cable
301 963
TH 340
Telescopic extension for TetraCon® 325 ..., 1.5 ... 3 m, with sensor holder
402 802
Protective armoring
1 SM 325
2 TG/Oxi-LF
2
3
Colony
Counter
Photometry
Turbidity
Software,
Printers
3
1
Shock-absorbing, rubber protective armoring with folding
support and sensor cable clamping device
Sleeve set, suitable for SM 325 protective armoring, consisting of
electrode sleeve, holding device and additional carrying strap for
field use. Can also be used for storing the sensor.
FM 325/Oxi-LF Field armoring, specially designed for rough use on-site and in
industry, extremely robust and shock-resistant thanks to
protective armoring with integrated electrode sleeve, carrying
handle and additional carrying strap with holding device, sensor
cable clamping device and folding support for laboratory
measurements
Ordering Information
Protective armoring
Order No.
SM 325
Shock-absorbing, rubber protective armoring
902 818
TG/Oxi-LF
Sleeve set, suitable for protective armoring SM 325
902 812
FM 325/Oxi-LF
Field armoring, specially for rough conditions
902 813
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
Customer
Service
for safe on-site use
Conductivity
2-electrode conductivity cell for pastes, K = 0.901 cm-1
MultiParameter
LTA/KS
BOD
301 602
Respiration
Sample
Preparation
4-electrode conductivity cell for pastes and emulsions with built-in
temperature sensor, K = 0.491 cm-1, with waterproof plug and 1.5 m cable
Oxygen
(D.O.)
Conductivity measurements in pastes and emulsions
TetraCon® 325/S
93
Software and printers
Information is given on
pages 180 - 183.
Conductivity
Conductivity
Meter
Accessories
Meters
❍
❍
❍
❍
Protective armoring
Flow-thru vessels
Stands and cell holders
Calibration and testing agents
page
93
94
94
95
Flow-thru vessels
Ordering Information
for LTA 1, LTA, LTA 01 and TFK 530
D 530
Order No.
Flow-thru vessel of transparent PVC,
suitable for conductivity cells and
temperature sensors,
I.D. 44 mm, V*=97 ml
108 060
Flow-thru vessel of transparent PVC,
I.D. 18 mm, V*=13 ml
203 730
for TetraCon® 325
D 201
for TetraCon® 96-1,5, TetraCon® 96 and KLE 1
D 1/T
Flow-thru vessel, glass
I.D. 24 mm, V*=36 ml
302 730
for LR 01/T and LTA 01
D 01/T
Flow-thru vessel, glass
I.D. 18 mm, V*=17 ml
302 750
Flow-thru vessel
I.D. 27 mm, V*=40 ml
302 700
for LTA 100
D 100
V*: filling volume without sensor
Stand and cell holder
Stand STH 650
Benchtop stand with flexible electrode
holder for measuring cells and temperature sensors
Ordering Information
Benchtop stand and cell holder
STH 650
94
Benchtop stand with flexible electrode holder
for pH electrodes, ion sensitive electrodes,
reference electrodes, temperature sensors, oxygen sensors
and TetraCon® 325 conductivity cells
Order No.
109 809
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
Calibration and testing agents
Shelf life 2 years,
NIST traceable with accuracy ±3%
Calibration standard 15 µS/cm
Shelf life 1 year,
NIST traceable with accuracy ±2%
As USP Kit 1, but flow-thru vessel made of
stainless steel instead of D01/T
300 568
Calibration agents
KS 100µS
Calibration standard 100 µS/cm, shelf life 2 years,
NIST traceable with accuracy ±3% (300 ml)
300 578
KS 15µS
Calibration standard 15 µS/cm, shelf life 1 year,
NIST traceable with accuracy ±2% (300 ml)
300 579
EP/SET
Calibration and platinization set (6 x 50 ml bottles calibration
and control standard, KCl 0.01 mol/l, 30 ml platinizing solution,
1 calibration vessel), only for platinized cells
300 570
E/SET
Calibration set (6 x 50 ml bottles calibration and control
standard, KCl 0.01 mol/l)
300 572
Testing agents for conductivity meters
6R/SET/LAB 1
Testing set for checking the conductivity meters according
to ISO 9000. Allows the measured values to be traced back
to national standards.
302 870
Only for LF 3000, LF 539, LF 537 and MultiLab® P4/P5
Testing set for checking the conductivity meters according
302 872
to ISO 9000.
Allows the measured values to be traced back to national standards.
ISE
Oxygen
(D.O.)
Customer
Service
6R/SET/LAB 2
Colony
Counter
USP Kit 2
Photometry
300 569
Turbidity
Kit for measuring the conductivity according to USP 24,
consisting of LR 325/01 Ultrapure water cell, D01/T
Glass flow-thru vessel, NIST traceable 15 µS standard
with accuracy ±2% and 6R/SET/LabTesting set
Respiration
Sample
Preparation
Order No.
USP Kit 1
Software,
Printers
Kit for measuring the conductivity according to USP 24
BOD
Ordering Information
Conductivity
Calibration standard 100 µS/cm
MultiParameter
NEW
ORP
pH
Kit for measuring the conductivity according to USP 24
This kit contains LR 325/01 Ultrapure
water cell,
D01/T Flow-thru vessel
made of glass (USP-KIT 1)
or stainless steel (USP-KIT 2),
NIST traceable 15 µS standard
with accuracy ±2%
and 6R/SET/LabTesting set
Laboratory
&
Field
General
Features
Conductivity Meter Accessories
Wissenschaftlich-Technische Werkstätten GmbH & Co. KG · Dr.-Karl-Slevogt-Straße 1 · 82362 Weilheim · Germany · Tel.: +49 (0) 881-1 83-0 · Fax: +49 (0) 881-62 53 9
95