On a tight budget and looking for a reliable, easy-to-use coulometric Karl Fischer titrator?

Then look no further than the Hiranuma 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 manufactured in Japan.

Comes with training movie CD, plasticized Quick-Start guide for use in the lab, paper and pdf manual. Also included, complete accessories, download software and the correct RS-232 cable.


  • All components are integrated in a small footprint of 31 cm (W) x 27 cm (D).
  • Saves valuable bench space.


  • No need to determine the KF reagent titre. Just flip the POWER on, the titrator will be ready to run within 30 minutes. Simple as 1, 2, 3, GO!


  • 4 user defined methods can be stored in memory and easily recalled according to samples.
  • Up to 20 results can be stored with statistics calculation.
  • Detection limit goes down to several ppm.


  • Equipped with two RS-232C ports for balance and computer connection.
  • Standard package includes AQUANet data download software, instruction movie, application guidebook and more.

Download the Brochure


  • Six (6) built-in calculation modes accommodate solid, liquid and gas samples.
  • One-touch calculations - including statistics package!
  • Four (4) files of 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 membrane or fritted cell system.
  • Choice of thermal printer or impact printer.
  • Free software for downloading titration results to a laptop or PC; includes the correct RS-232 cable.
  • Competitive price.
  • Complete accessories kit enables the end-user to run samples right out of the box. There is nothing else to purchase on start-up.
  • Hundreds sold since being introduced to the North American market.


 Technical Specifications



Titration method

Coulometric Karl Fischer titration method

Electrolytic control method


Constant current electrolysis, intermittent electrolysis in the vicinity of the end point only

Titration control method

AC polarization potential difference detection method

(1) Automatic stop at endpoint after elapsed INTERVAL time (INTERVAL: Max. 99 sec.)

(2) Titration time settings system (T-TIMER: Max. 99 min.)

Automatic background compensation range

0 - 50μg H2O/min

Display screen

2-lines, 16 digit LCD with backlighting

Display unit

μg H2O, %, ppm

Detection sensitivity

0.1μg H2O


CV of 0.3 %

With water-methanol (1 mg H2O/mL),1 g is measured 10 times

Measuring range

10μg H2O - 99mg H2O

Required measuring time

FAST 50 sec/mg H2O

SLOW: 100 sec/mg H2O

Titration cell capacity

150 mL

File function

4 files for titration parameters

External input/output

Balance, printer and RS-232C data output


Optional thermal / impact printer


5 sec alarm when titration ends

Power supply / Power consumption

AC100 - 240V, 50/60 Hz & 100VA


310 (W) x 270 (D) x 300 (H) mm


Approx. 5kg

Safety approval

CE approved

HIRANUMA AQ-300 Coulometric Karl Fischer Titrator

Save $500

$6,490 $6,990

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