Hybrid Karl Fischer Titrator MKH-700

Hybrid Karl Fischer Titrator MKH-710
Hybrid Karl Fischer Titrator MKH-700

Gone are the days when people had to worry about whether a Karl Fischer coulometric or volumetric titrator was the appropriate solution for their applications – worries about the correct sample size and tedious reagent factor determinations with water standards are now things of the past.

The MKH-700 ushers in a new era of Karl Fischer Titration: It is the first Karl Fischer Titrator which can do both, volumetric and coulometric Karl Fischer titrations. The MKH-700  seamlessly combines both methods, adapting the titration procedure perfectly to the water content and nature of the sample being measured.


Coulometer? Volumeter? Hybrid!
The Hybrid Karl Fischer Titrator not only performs both, volumetric and coulometric Karl Fischer titrations: Depending on the water content of the sample, the hybrid titrator automatically applies the most appropriate procedure to perform the titration. This ensures maximum accuracy within the shortest possible measuring time.

 

Karl Fischer factor measurement – a matter of a keystroke
No water standards to inject, no weighing errors, less work: The instrument determines the factor of the Karl Fischer reagent by coulometric backtitration at the click of a button.

 

No need to worry about the correct sample size
No matter whether a sample contains 10 μg or 500 mg of water: The MKH-700 automatically applies the most accurate and quickest procedure to measure it.

 

Easy operation, trouble-free maintenance
A large capacity, easy to open titration cell with a large sample inlet and a generator electrode with replaceable membrane ensure easy operation and maintenance.

Details

Hybrid Karl Fischer Titrations:
Highest speed and accuracy over a wide water content range

The MKH-700 not only performs both, coulometric or volumetric titrations, it can even combine the two methods in a way, which ensures highest accuracy and short analysis times: In the so called Hybrid Titration (patent pending) the MKH-700 automatically detects the amount of moisture in the sample and behaves accordingly:

  • If the initial moisture content is high, the titrator runs both, coulometric and volumetric titrations in parallel until the moisture content is below a certain level. Once the moisture content is below a certain level, the addition of KF reagent is stopped and the titration is finished coulometrically.
  • If the initial moisture level is low, the whole titration is performed coulometrically.
Karl Fischer Hybrid Titration
Karl Fischer Hybrid Titration: If the initial moisture content is high, coulometric and volumetric tiitrations are run in parallel until the moisture content is below a certain level.
Karl Fischer Hybrid Titration: If the initial moisture content is low, the whole titration is performed coulometrically.

The ultimate all-rounder for Karl Fischer moisture determinations

Whatever the nature of sample to be measured, the MKH-700 always applies the fastest and most accurate type of Karl Fischer titration  to determine its moisture content:

  • Coulometric, for very low water contents.
  • Hybrid for higher water contents.
  • If required it is of course possible to select the titration method to apply (coulometric or volumetric) manually.
  • The MKH-700 is capable of performing bromine number and index determinations according to ASTM D2710, JIS K2605 and K2435. Such determinations can be performed volumetrically and coulometrically.

For samples which cannot be titrated directly (like plastics, paper, motor oils with additives) the MKH-700 can remotely control an ADP-610 evaporator.

Furthermore, the MKH-700 can be equipped with an additional internal or external burette.

MKH-700 Hybrid Titration Cell: Karl Fischer reagent can be added coulometrically and volumetrically.
MKH-700 Hybrid Titration Cell: Karl Fischer reagent can be added coulometrically and volumetrically.
Karl Fischer titrations can be done using the hybrid method.
The MKH-700 can perform coulometric Karl Fischer titrations.
The MKH-700 can perform volumetric Karl Fischer titrations.
The MKK-700 is capable of performing bromine number and index determinations. Such determinations can be performed volumetrically and coulometrically.
The MKH-700 can be equipped with an additional internal (left) or external (right) burette.
The MKH-700 can control an external burette. With an external APB-600 piston burette it can even run two volumetric Karl Fischer titrations in parallel.

Factor measurements without water standards

The MKH-700 can determine the factor of the volumetric Karl Fischer reagent by coulometric backtitration. This feature (patent pending) offers major advantages in terms of ease of use:

  • No balance required, no weighing errors possible.
  • Absolute method, no water standards required.
  • Much less work involved. A three fold factor determination is a matter of one single keystroke.
  • Safer: If the relative standard deviation of the three fold factor determination exceeds 1%, the procedure is automatically repeated.
Factor measurement of Karl Fischer reagent by coulometric backtitration.
Factor measurement of Karl Fischer reagent by coulometric backtitration.
Factor measurement of Karl Fischer reagent by coulometric backtitration.
One click on the Electrolysis button is enough to perform an automatic 3 fold factor measurement of the Karl Fischer reagent.
Result of a 3 fold Karl Fischer factor measurement.

Straightforward operation

The large color touchscreen of the MKH-700 Karl Fischer Hybrid Titrator provides an intuitive user guidance and offers at the same time a clearly laid out display of all the relevant information during the measurements.

Click the Pre-Titr. button
Click the Pre-Titr. button.
Once the drift is stable, click the sample button.
Enter the sample data.
Click the Start button.

Easy operation and maintenance

The MKH-700 comes with a large capacity titration cell with a large sample inlet and an easy to remove, multi purpose  top cover. This new design offers substantial advantages compared to traditional Karl Fischer titration cells:

  • The solvent in the titration cell needs to be replaced less frequently.
  • The introduction of difficult samples like powders is much easier.
  • One titration cell can be used for volumetric, coulometric and hybrid Karl Fischer titrations.
  • The cover of the cell can completely be removed. Cleaning of the cell and removing of stuck electrodes is easier than ever before.

The MKH-700 comes with a built-in pump to drain and fill the titration cell.

Furthermore, the coulometric generator electrode is equipped with a membrane, which is can easily be replaced.

The cover of the titration cell of the MKH-700 can completely be removed.
The cover of the titration cell of the MKH-700 can completely be removed.
Removing of stuck electrodes is easier than ever before.
The cover of the titration cell can be removed (left), the diaphragm of the generator electrode can be replaced (right).
The same titration cell can be used for volumetric, coulometric and hybrid Karl Fischer titrations.
The diaphragm of the generator electrode can be replaced.
The MKH-700 comes with a built-in pump to drain and fill the titration cell.
A large sample inlet makes the introduction of difficult samples like powders much easier.

Automatic monitoring, alert and check functions

A multitude of functions and automatic alerts help to ensure reliable results and a smooth trouble free operation of the system:  The MKH-700 issues a warning when the Karl Fischer reagent needs to be replaced. Periodic alerts prompt the operators to perform system performance checks at regular intervals.

Overview coulometric Karl Fischer reagents
Overview coulometric Karl Fischer reagents.
Setting alarms for coulometric reagent (anolyte).
Overview volumetric Karl Fischer reagents.
Setting alarms for volumetric Karl Fischer reagents.

Automated heating method

The MKH-700 can remotely control the ADP-611 evaporator. This allows to define all the measuring parameters including the purge cycles and the temperature in the evaporator in one single method. The temperature in the evaporator needs to be selected according to the nature of the sample being measured: It should be high enough to evaporate the water as quickly and completely as possible, but not so high as to decompose the sample. By executing a measurement with the scan function, the system determines the ideal evaporator temperature automatically.

ADP-611 karl Fischer evaporator
ADP-611 evaporator
Menu to purge the ADP-611 evaporator.

Enhanced ergonomics

The MCU-610 control unit of the titrator can be placed up to 10 m away from the titration unit, it can be wall mounted and the angle of its screen can be adjusted between 0 and 90°. A good visibility and an ergonomic operation is guaranteed even if the system has to be set up on a relatively high bench.

MCU-610 touch panel control
MCU-610 control unit
The angle of the MCU-610 can be adjusted
The angle of the MCU-610 can be adjusted

Extensive functions for data evaluation and statistics

The statistics functions of the MKH-700 not only ensure an easy execution of multiple determinations, they also simplify n-fold determinations of blank values as the mean values of such determinations are automatically stored.

The MKH-700 offers furthermore advanced filter functions for titration results stored in the instrument in order to evaluate them statistically. Titration data can as well be stored on an USB flash drive or a compact flash card.

List of stored results
List of stored results.
By clicking on Statistics a statistical evaluation of the filtered out results is performed.
Results can be stored on an USB memory stick.
Stored measurements can be displayed, the results can be recalculated.

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Standards

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DIN10252

ISO 8534:2008
ISO 5381:1983
ISO 8534:2008

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ASTM 1533-00
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DIN 51777
EN ISO 12937:2002-03

ISO 760:1978
ISO 2097:1972
ISO 2514:1974
ISO 4317:1991
ISO 10336:1997
ISO 10337
ISO 10338
ISO 10339
ISO 10340
ISO 10341
ISO 10342

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Standards

ASTM D 4928-11

ISO 760:1978
ISO 2097-1972
ISO 4317:1991
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Remarks (23) … (48)

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Standards

ASTM D 4017
ISO 760:1978

Remarks (1) ... (22)

Technical Specifications

Specification   Contents
Type    Hybrid Karl Fischer Moisture Titrator
Model   MKH-700
Coulometric Titration    Measurement method   Karl Fischer Coulometric Titration
Measuring range Water content 10 μg … 300 mg H2O
Precision  RSD less than 0.3% (n=10)
Display resolution 0.1 μg
Volumetric Titration      Measurement method   Karl Fischer Volumetric Titration
Measuring range  Water content 100 μg … 500 mg H2O
(depends on KF reagent factor)
Concentration 1 ppm … 100% H2O
Burette   Volume 10 mL
Discharge precision ±  0.015 mL
Repeatability ±  0.005 mL
Hybrid Titration    Measurement method   Karl Fischer Coulometric Titration
Karl Fischer Volumetric Titration
Measuring range Water content 10 μg … 500 mg H2O
 Precision  RSD less than 0.3% (n=10)
(Karl Fischer reagent factor 3 mg/mL)
Display resolution 0.1 μg
Factor measurement of reagent by electrolysis   Measurement method   Factor measurement of reagent by electrolysis
Measuring range KF reagent Reagent factor from 1 to 5 
Precision RSD less than 1.0% (n=3)
(dose volume 0.5 mL, reagent factor 3 mg/mL)
Data storage    On board memory 300 measurements
External memory Memory card (Compact Flash), USB memory stick
GLP conformance   Yes
External I/O (measuring unit)      RS-232C 1ch (for sample changer / Evaporator)
SS-Bus 1ch (for automatic piston burette)
K-NET 1ch (for main control unit)
External I/O (main control unit)        COM1/COM2 2ch (for dot matrix printer, electronic balance, PC)
CF card 1ch (Compact Flash)
USB 1ch (USB memory stick)
K-NET 2ch (measuring units)
Languages   English / Japanese
Ambient conditions    Temperature 5 … 35 °C
Humidity < 85% RH (no condensation)
Power supply    Measuring unit DC 24 V 5 A
AC 100 … 240 V ± 10% 50/60 Hz (comes with AC adapter)
Main control unit DC 12 V  3A
AC 100 … 240 V ± 10% 50/60 Hz (comes with AC adapter)
Dimensions        Measuring unit 141 (W) x 296 (D) x 383 (H) mm (not incl. tubing)
Main control unit 230 (W) x 285 (D) x 255 (H) mm
Stirrer / Cell 110 (W) x 230 (D) x 350 (H) mm
Dispenser 240 (W) x 170 (D) x 110 (H) (not incl. tubing)
CE marking    Conforming to EN61326, EN61010-1,
RoHS compliant
Export packing in double carton box      MKH-700 G/W 12.0 kg | 560 (W) x 440 (D) x 505 (H) mm
G/W 26.5 lbs | 22.0 (W) x 17.3 (D) x 19.9 (H) inches
MCU-600 G/W 3.6 kg | 367 (W) x 307 (D) x 152 (H) mm
G/W 7.9 lbs | 14.4 (W) x 12.1 (D) x 6.0 (H) inches
IDP-100 G/W 2.0 kg | 265 (W) x 185 (D) x 190 (H) mm
GW 4.4 lbs | 10.4 (W) x 7.3 (D) x 7.5 (H) inches

Software

Soft Cap Data Capture Software

SOFT CAP Data Capture Software
SOFT CAP Data Capture Software

The easy way to transfer your results directly to Microsoft EXCEL

The Data Capture Software is an easy to use and flexible solution to collect measurement results from different KEM instruments (Refractometers, Density Meters, Potentiometric or Karl-Fischer Titrators, Thermal Conductivity Meters) on a Windows personal computer.

  • Up to four different instruments can be connected to one single PC and be used simultaneously. Two of these instruments can be of the same model.
  • The results can directly be stored in EXCEL workbooks. The measured results are always available at a glance in a clear and concise manner.
    • As soon as a measurement has finished, the result appears in the corresponding worksheet.
    • The layout, order and the format how the results are stored in EXCEL can freely be adapted to specific needs.
    • Results can be automatically be processed by EXCEL macros as they are transmitted to the PC. Additional data (comments, sample data, etc.) can be entered at any time by means of the PC keyboard or a barcode reader.
  • All results can at the same time be stored in as CSV files.

System Requirements for PC

SpecificationDescription
Computer Personal computer with Pentium II CPU of 233MHz or better
Operating system Microsoft Windows 2000, XP,
Vista (Home Basic, Business), 7 (Home Premium, Professional)
Other programs Microsoft EXCEL 97 / 2000 / 2003 / 2007
RAM at least 128 MB / 512 MB recommended
Hard disc space 10 MB required for installation
Display Resolution higher than 640 * 480
Disk drive CD-ROM or DVD-ROM
Interface 1 USB port
RS-232C D-sub (male) 9 pin required for each additional instrument
to be connected to the same computer.

Accessories

Printer

IDP-100 Printer
IDP-100 Printer

IDP-100 Printer

Dot matrix ink printer for GLP compliance.

  • Dot matrix printer with ink ribbon, prints on regular paper (width 57.5 ± 0.5mm).
  • 24 digits, 144 dots per line.
  • Automatic paper end detection - no loss of data!
  • 2 kB internal buffer memory. Advantage: Less time required per measurement, as the instrument does not have to wait until the results are printed out.

Evaporator

ADP-611 Evaporator
ADP-611 evaporator

ADP-611: Accurate water determinations of difficult samples

The ADP-611 substantially broadens the application spectrum of your Karl Fischer Titrator. With this evaporator accurate water determinations of samples which cannot be titrated directly can be performed:

  • Substances which cause side reactions with the KF reagent such as copper (II) salts, iron (III) salts, nitrites, motor oils with additives, etc.
  • Substances that release water only at elevated temperatures like plastics
  • Substances which would contaminate the titration cell like coal dust, carbon black, etc.
  • Substances that are poorly soluble or insoluble such as cotton, paper, compressed wood, etc.

The ADP-611 features a modern microprocessor control ensuring maximum precision, reliability and user-friendliness: 

  • Easy method development: A patented scan mode automatically determines the optimal evaporation temperature based on the relation between released water and heating temperature.
  • Rapid rise and accurate control of the heating temperature.
  • Digital display of temperature and flow rate.
  • Automatic alarm if the set temperature cannot be reached within a certain time or if the temperature in the oven exceeds 350°C.
  • Serial interface which enables the evaporator to be remote controlled by the MKA-610 and MKC-610 Karl Fischer titrators.

To safely avoid contamination from atmospheric moisture the ADP-611 is equipped with a remote controlled motor driven magnetic bar to move the sample from the sample chamber into the oven.

The heating chamber is equipped with an electrically conductive transparent heater glass. This permits the sample condition to be monitored during the vaporization process.

The ADP-611 comes with two built-in desiccant tubes for the carrier gas. With an optional air pump, air instead of nitrogen can be used as carrier gas.

 

Technical Specifications ADP-611
Heating system Electrically conductive transparent heating glass  
Temperature control Control method
Setting range
Temperature sensor
Temperature measurement precision
proportional
50 … 300 °C
K-thermocouple
± 2 °C
Display Temperature or flow, LED, 3 digits  
Heating tube Pyrex® glass tube 30 (ø) x 335 (L) mm
Sample boat Pyrex® glass
Capacity
68 (L) x 25 (W) x 15 (H) mm
16 mL
Carrier gas Nitrogen (not included in supplied parts)
Air (air pump optional)
Gas flow rate


100 … 300 mL/min
Gas dryer Zeolite 100 g 2 pcs (500 g Zeolite included in supplied parts)  
Interface RS-232 9 pin male for communication with KF titrator  
Ambient conditions Temperature: 5 … 35°C
Humidity: < 85% RH
 
Power Supply (set in factory)
Consumption
100 … 120 V, 200 … 240 V AC, 50/60 Hz
300 W
Dimensions 370 (W) x 195 (D) x 217 (H) mm  
Weight 100 … 120 V version
200 … 240 V version
approx. 5 kg
approx. 7 kg

Titration Units and External Burettes

APB-610 Automatic Piston Burette
APB-610 Automatic Piston Burette

Automatic Piston Burette APB-610

The Automatic Piston Burette APB-610 can be used either as stand alone precision burette to perform manual titrations or as an additional external burette for KEM titration systems based on an AT-510, AT-610 or AT-700 Titrator. The APB-610 allows to meter liquids with highest accuracy even under difficult circumstances:

  • The end of the feeding hose is equipped with a device which prevents diffusion.
  • The burette can be equipped with a temperature sensor to monitor the temperature of the liquid and to correct possible errors due to thermal expansion caused by variations of the surrounding temperature.
  • The glass body of the burette is shielded by a protection cover.
Techical Specifications APB-610
Display LCD 2 lines x 16 characters
Burette 20 mL, glass with brown safety cover
1, 5, 10 and 50 mL burettes available as option
Burette precision 1 mL burette: ± 0.005 mL
5 mL burette: ± 0.01 mL
10 mL burette: ± 0.015 mL
20 mL burette: ± 0.02 mL
50 mL burette: ± 0.05 mL
Dispense rate Approx. 20 s for complete discharge
Valve Automatic ceramic valve
Liquid contacted materials PTFE, boron silicate glass, ceramic
Interface RS-232C, mini DIN, 8 pin, female
Ambient conditions Temperature: 5 … 35°C | Humidity: < 85% RH
Power supply 100 … 120 V, 200 … 240 V AC, 50/60 Hz
Power consumption Approx. 20 W
Dimensions 120 (W) x 363 (D) x 610 (H) mm (including burette unit)

Samplers

SketchPart CodeDescription
karl_fischer_sampler_3011.png 98-740-3011 Bent-type sampler for powders (1 … 1.5 mL)
karl_fischer_sampler_3020.png 98-740-3020 "C" bent-type sampler for powders
karl_fischer_sampler_3025.png 98-740-3025 Light weight sampler for powders
karl_fischer_sampler_3026.png 98-740-3026 Straight type light weight sampler
karl_fischer_sampler_3030.png 98-740-3030 Sampler for viscous products
karl_fischer_sampler_3031.png 98-740-3031 Sampler for highly viscous products
karl_fischer_sampler_4013.png 98-433-4013 Liquefied gas sampler with pressure vessel made of stainless steel (100 mL)
karl_fischer_sampler_3013.png 98-740-3013 Sampler for oils
karl_fischer_sampler_3012.png 98-740-3012 Spoon type sampler for viscous products
karl_fischer_sampler_3024.png 98-740-3024 Eggplant type sampler for powders
karl_fischer_sampler_3166.png 98-500-3166
98-500-3225
Syringe (5 mL)
Syringe (20 mL)
karl_fischer_sampler_3407.png 98-433-3407 Stopper for syringe inlet port
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