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AQUACOUNTER® Karl Fischer Volumetric & Coulometric Titration Instruments
Karl Fischer Titrators are hardly new to North America, having been sold here for the last 20 years. Manufactured in Japan by the Hiranuma Company, Karl Fischer volumetric titrators, coulometric titrators and titration instruments represent the highest standards of performance and quality by which all other titrators are measured. Hiranuma manufactured its first potentiometric titrator in 1965 and continues to offer innovative coulometric and volumetric titrator products for testing moisture on the production line, acceptance testing of raw materials, or developing new products in the R&D lab. Hiranuma's AQV-2100S, the AQ-2100S Coulometric Titrator , and the AQV-2000C Combination Volumetric-Coulometric Titrator all display real-time curves for monitoring the progress of any titration. Easily visualize your results while the!
y are occurring on a large, easy-to-view, backlit liquid crystal display. Store up to 50 results, including data points as well as titration curves in the instrument's memory. No more lost data! Simply retrieve and print out data anytime they are required.
The AQV-2100C Volumetric-Coulometric Titrator has two channels available for both coulometric titrations and volumetric titrations. For those who need single channel instruments now, but may need two channels in the future, the AQV-2100S and the AQ-2100S Karl Fischer titrators are capable of expanding to accommodate your future needs with a factory-installed conversion kit. Similarly, the AQV-2100S, which is a single channel volumetric titrator, can be easily converted to either a dual channel volumetric, or combination volumetric-coulometric titrator. Other combinations are possible; please inquire with your needs.
JM Science's new AQUACOUNTER Karl Fischer instruments offer state-of-the-art performance, with unprecedented adaptability, simplicity and accuracy. Our new low cost titrators, the AQ-300 and the AQV-300 offer the same specifications as the 2100 series but are available at very special low pricing. All AQUACOUNTER titrators are covered by a comprehensive warranty and come with demo Karl Fischer reagent kits formulated to work beautifully with our line of titrators or any others.
Volumetric Karl Fischer Titrator
AQV-2100S
- Multi-channel Capability
- Large Back Lit LCD Display
- Real Time Titration and Background Curves
- GLP/ISO Compatibility
- Automatic Control of Evaporator
- Storage for 50 Results
This dependable workhorse has an extremely wide measuring range... From ppm to 100%, its automatic background compensation function allows accurate volumetric measurements of trace moisture levels. The unit has a 10ml single buret, a single stirrer, and a single volumetric cell. The AQV-2100S can also be converted to either a two channel volumetric titrator or a two channel volumetric-coulometric titrator. The volumetric conversion allows the use of two different strength titrants for maximum analytical flexibility.
AQUACOUNTER® AQV-2100S Volumetric Titrator Specifications| Item | Specifications |
| Titration Method | Volumetric titration with Karl Fischer reagent |
| Titration control method | Intermittent titrant addition while approaching the end point. (1)Wait-time (INTERVAL) controlled; duration from 1-99sec (2)Titration-time (T-TIMER) controlled; duration from1 second to 99 minutes |
| Background correction | Automatic correction can be enabled/disabled. |
| Buret | Capacity; 10 ml, reproducibility; ±0.01 ml (for full discharge, standard deviation for n=5) Accuracy: within-:4.1 5% (for full discharge,n=5) |
| Tubing | Teflon tube of 2 mm (ID) and 3 mm (OD) |
| Accuracy | Within CV of 0.3 With water-methanol (1mg H2O/mL),Ig is measured 10times. |
| Valve selection | Automatic selection with ceramic joint valve |
| Number of burets | 1; (expandable to 2) |
| Measurement range | 0.1 mgH2O- 500mgH2O |
| Minimum volume of addition | 0.005 ml or 0.01 ml |
| Minimum volume of addition | 0.005 ml or 0.01 ml |
| Titration cell capacity | 150 ml, minimum volume of consumption; about 30 ml |
| Display screen | Graphic liquid crystal display |
| Display units | ml, mgH2O, %, and ppm (min. display is 0.001 ml.) |
| Calculation functions | Concentration, factor standardization, and statistics |
| Method files | Titration parameter files; 20 Sample file; 1 (number of reserved samples = 99) EV file : 20 |
| Memory data capacity | 50 data points/channel |
| Printer interface | One port standard |
| External input/ output | RS-232C; 2 ports Port 1 (HOST)_/index.html command instructions from host computer (Port 1 is used for output to the host computer or for theheating vaporization device connection.) Port 2 (BALANCE)_/index.htmldata input from a balance or data outputto a host computer.) |
| Power supply | 100-240 V AC, 100 VA, CE Marked |
| Dimensions | 220 (W), 400 (D), and 330 mm (H) |
| Weight | About 7 kg (Stirrer and printer not included.) |
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Volumetric/Coulometric Karl Fischer Titrator
AQV-2100C
- Dual titration capability of this extraordinary tool performs the widest range of Karl Fischer applications without exception.
- Menu-driven system makes it easy to program and perform all operations.
- Large LCD viewing area shows a wealth of information and makes real time curves easy to read.
The AQV-2100C provides the flexibility you need to perform titrations on a wide range of samples regardless of their water content. From a few ppm all the way to 100%, you'll have all the analytical capability you need right on your benchtop. Whether you're performing a coulometric titration on a lyophilized protein or a volumetric titration on cosmetics, you'll be able to count on fast, accurate results.
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Coulometric Karl Fischer Titrator
AQ-2100S
- New options allow generation of detailed titration curves, even for one minute titrations.
- Increased coulometric-current range reduces blanking time up to 50%.
- Innovative cell design decreases maintenance over the life of the cell.
- Replaceable membrane combines the superior precision of a ceramic frit with the ease-of-maintenance of a fritless system.
- Convenient, quick, and safe electrode cable attachment.
- Optional Fritless Cell.
The AQ-2100S is our standard coulometric titrator. This unit consists of one stirrer and one coulometric cell, and is the logical choice for most trace moisture applications. An optional coulometric kit is available that will convert the unit to a two-channel coulometric titrator. With the addition of this kit, you'll be able to quickly and efficiently run both routine samples and those problematic samples that require special reagents (e.g., aldehydes and ketones).
AQUACOUNTER® AQ-2100S Coulometric Titrator Specifications| Item | Specifications |
| Titration Method | Coulometric titration process |
| Electrolytic control method | Constant current electrolysis, intermittent electrolysisin the vicinity of the end point only. |
| Titration control method | AC polarization potential difference detection method (1)Wait-time (INTERVAL) controlled; duration from 1-99 sec (2)Titration-time (T-TIMER) controlled; duration from1 second to 99 minutes |
| Automatic conpensation Range for background |
0 - 50 µg H2O/min. |
| Measuring range | 10 µg H2O - 99 mg H2O |
| Accuracy | Within CV of 0.3 With water-methanol (1mg H2O/mL),Ig is measured 10times. |
| Required measuring time | FAST 33 sec/mg H2O MEDIUM 50 sec/mg H2O SLOW 100 sec/mg H2O |
| Titration cell capacity | 150 ml. |
| Display screen | Graphic liquid crystal display. |
| Display units | ug H2O, %, and ppm (least amount of display is 0.1 ug) |
| Calculation functions | Concentration and statistics |
| Method files | Titration parameter files; 20 Sample file; 1 (number of reserved samples = 99) EV file : 20 |
| Memory data capacity | 50 data points/channel |
| Printer interface | One port standard |
| External input/output | RS-232C; 2 ports Port 1 (HOST)_/index.html command instructions from host computer (Port 1 is used for data output to the host computer or forthe heating vaporization device connection.) Port 2 (BALANCE)_/index.html data input from a balance or data outputto host computer. |
| Power supply | 100-240 V AC, 100 VA, CE Marked |
| Dimensions | 220 (W), 400 (D), and 200 mm (H) |
| Weight | About 4.5 kg (Stirrer and printer not included.) |
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New AQUACOUNTER® AQV-300 Low Cost Volumetric Karl Fischer Titrator
On a tight budget and looking for a reliable, easy-to-use volumetric Karl Fischer titrator?
Then look no further than the AQUACOUNTER® AQV-300. State-ofthe-art performance features let you measure moisture content from low to high concentrations quickly and accurately.
Measurements are simple and routine with unsurpassed precision.

- Six (6) built-in calculation modes accommodate solid, liquid and gas samples.
- One-touch calculations including a statistics package!
- Four (4) files with preset conditions can be stored in memory
- Balance and computer interfaces for GLP and ISO documentation.
- Instant recall of data for up to 20 samples.
- Built-in detector monitors titration status.
- Compact unit with small footprint
- Choice of thermal printer or impact printer.
- Direct key access allows entry of titration parameters
- Very competitive price
AQUACOUNTER® AQV-300 Standard Specifications
| Item | Specifications |
| Titration Method | Volumetric Karl Fischer titration method |
| Titration control method | Intermittent addition of titrant while approaching the end point. (1) Control by waiting interval timer of 1-99 sec (INTERVAL).Titration stops when there is no change in the electrode potential during this interval. (2) Control by titration timer (T-TIMER: 1-99 min.) |
| End point detection | DC polarization potential difference detection. |
| Buret capacity | 10 ml |
| Valve selection | Automatic selection with ceramic joint valve |
| Number of burets | 1 |
| Display screen | Graphic liquid crystal display |
| Display units | 2 lines by 32 digits with backlit LCD |
| Display units | ml, mg H2O, %, or ppm (display minimum=0.01 ml) |
| Measuring range | 100 ppm - 100% |
| Minimum volume of addition | 0.01 ml |
| Calculation function | Concentration, factor standardization |
| Titration cell capacity | 150 ml |
| Minimum volume of consumption | Approx. 30 ml |
| External input/output | RS-232C; 2 ports Port 1 (HOST) Command instructions from host computer Port 2 (BALANCE) Data input from balance or data input |
| Dimensions | 310 mm wide x 270 mm deep x 300 mm high |
| Printers | Optional thermal printer: Seiko DPU-414 Optional impact printer: Citizen CBM-910 |
| Power supply ; Power consumption | AC 110 V, 50/60 Hz & 100VA, CE Marked |
| Weight | 6 Kg |
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New AQUACOUNTER® AQ-300 Low Cost Coulometric Karl Fischer Titrator
Are you on a tight budget and looking for a reliable, easy-to-use coulometric Karl Fischer titrator?
Then look no further than the AQUACOUNTER® AQ-300. With state-of-the-art performance features like a fritless cell option, the AQ-300 offers the same fast and accurate results you've come to expect from other Hiranuma titrator products.

- Six (6) built-in calculation modes accommodate solid, liquid and gas samples
- One-touch calculations including a statistics package!
- Four (4) files with preset conditions can be stored in memory
- Balance and computer interfaces for GLP and ISO documentation
- Instant recall of data for up to 20 samples
- Built-in detector monitors titration status
- Choice of ion exchange or fritless cell system
- Choice of thermal printer or impact printer
- Printout Contents: date, sample number, measurement value (ugH2O),sample quantity, moisture content, mean value, standard deviation, CV, moisture quantity-time curve, other preset titration parameters
| Item | Specifications |
| Titration Method | Coulometric Karl Fischer titration method |
| Electrolytic control method | Constant current electrolysis, intermittent electrolysisin the vicinity of the end point only |
| Titration control method | AC polarization potential difference detection method (1) Automatic stop at endpoint after elapsedINTERVAL time (INTERVAL: Max. 99 sec.) (2) Titration time setting system (T-TIMER: Max. 99 min.) |
| Automatic background compensation range | - 50 µg H2O/min. |
| Display screen | 2-lines by 32 digits with backlit LCD |
| Display unit | pg H2O, %, ppm |
| Detection sensitivity | 0.1 pg H2O |
| Accuracy | +/- 1µg H2O during 10-1,000.tg H2O measurements (whensampling more than 1 g of H2O- methanol standard) +/- CV of 0.3 % during 1 - 30 mg H2O measurement (for standardcell) |
| Measuring range | 10 pg H2O - 99 mg H2O |
| Required measuring time | FAST 50 sec/mg H2O |
| Titration cell capacity | 150 ml |
| Input of parameter settings | With key pad |
| File function | 4 files for titration parameters |
| External input/output | Balance, Printer and RS232C data output |
| Dimensions | 310 mm wide x 270 mm deep x 300 mm high |
| Printers | Optional thermal printer: Seiko DPU-414 Optional impact printer: Citizen CBM-910 |
| Alarm | 5 sec alarm when titration ends |
| Power supply ; Power consumption | AC 100-240 V, 50/60 Hz & 100VA, CE Marked |
| Weight | 5 Kg |
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AQS-2010 VOLUMETRIC
Automated Evaporation KF Titration System AQS-2010 (Automated Evaporator/Sample Changer EV-2010)
For medium to heavy workloads
Up to 10 samples can be mounted on the turntable at the same time. Up to 99 samples can be run by simply removing the finished sample and adding a new one.
Extremely compact design
A compact upright design for both the heating block and the KF titrator saves your valuable bench space.
Wide temperature range and programmable temperature control
The heating temperature can be set up to 30° C and programmed up to 3 steps.
This feature makes it easier to find the optimum temperature for each individual sample, or allows you to differentiate surface water from bound water.
Integrated Air Pump
Compact, integrated air pump (Optional) eliminates the need for nitrogen carrier gas.
Incorporate both coulometric and volumetric titrator
The EV-2010 automated evaporator/sample changer can be connected with both the AQ-300 coulometric titrator and the AQV-2100 volumetric titrator, which makes the AQS-2010 a complete automated evaporation KF titration system. For the best accuracy for determining trace level of water, AQ-2100 coulometric titrator is recommended.
| Number of sample vials: | 10 |
| Volume of sample vial: | 10 ml |
| Seal: Carrier gas: Carrier gas flow rate: |
PTFE cap with aluminium foil Nitrogen or Dry air (Optional) 30 - 300 ml/min |
| Carrier gas desiccant: Heater: Heating block material: Temperature range: Power: |
Molecular Sieves Band heater Aluminium RT to 300° AC100-240 V AC 50/60Hz 250VA |
| Dimension: | 260W x 600D x 280W (mm) |
| Weight: | 11 kg |
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Evaporators
AQUACOUNTER® EV-2000 Solid Evaporator

For samples that cannot be conveniently tested by direct titration , JM Science offers two evaporator models...
One designed for solids and one designed for grease, heavy oils and other difficult samples. Both are fully-compatible with our AQUACOUNTER® Karl Fischer titrators and are extremely valuable in analyzing difficult samples.
In concert with the AQ-2100S, the AQV-2100S and the AQV-2100C titrators, the EV-2000 Solid Evaporator uses up to three different temperatures during the titration. Surface moisture can now be differentiated from bound moisture.
EV-2000 Standard Specifications| Item | Specifications |
| Temperature control | Settable, automatic temperature control. |
| Heating range | (Room temperature)-350 °C Overheat protection bythermostat. |
| Carrier gas Flow rate |
N2 gas or dry air 0.1-0.5 L/min (settable) |
| Carrier gas input pressure | 0.8 MPa or less |
| Carrier gas desiccant | Molecular sieves 100 g |
| Heater | Band heater |
| Sample volume | About 10 mL or less |
| Measurement range | Conforms to specifications for water content measurement instrument |
| Power requirements | 100 V -240 V, AC 50/60 Hz, 150 VA, CE Mark |
| Size | 220 (W) x 430 (D) x 200 (H) mm |
| Weight | About 8 kg |
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AQUACOUNTER® EV-2000L Oil Evaporator

The EV-2000L Oil Evaporator utilizes azeotropic distillation (Miniature Dean & Stark Distillation). It determines moisture in grease and lubricants quickly and efficiently by direct titration of vapors produced by distillation of the solvent and the sample. This evaporator can be used with any Karl Fischer titrator, regardless of manufacturer.
| Item | Specifications |
| Evaporation method | Indirect draft azeotropic distillation method (With N2 gas ordry air). |
| Temperature adjustment | Selectable, automatic temperature adjustment. |
| Carrier gas | N2 gas or dry air. Flow rate : 30-300 mL/min (settable) |
| Carrier gas inlet pressure | 0.8 MPa or less |
| Carrier gas desiccant | Molecular Sieves 100 g |
| Heater | About 100 VA, band heater, room temp-2000 |
| Sample volume | About 10 mL or less |
| Measurement range | The same as that of water content measurementinstrument. |
| Solvent | Benzene, toluene, Xylene, etc.Volume for one measurement : 5-10 mL. |
| Power source | 100V-240 V, AC 50/60 Hz, 150VA., CE Mark |
| Size | 220 (W) x 340 (D) x265 (H) mm |
| Weight | About 7 kg |
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