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AQ-300 Karl Fischer Coulometric Titrator

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Compare AQ Series Karl Fischer titrators

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 youʼve come to expect from other AQUACOUNTER® products.

Comes with DVD training movie, plasticized Quick-Start guide for use in the lab and paper and pdf manuals. Also included is a very complete accessories kit, free download software with the correct 9 pin RS-232 cable, and everything you need to get started. You need only supply the required KF reagents that can be purchased from JM Science or many other suppliers.



  • 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.
  • Very competitive price.



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
Accuracy 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
Printers Optional thermal / impact printer
Alarm 5 sec alarm when titration ends
Power supply / Power consumption AC100 - 240V, 50/60 Hz & 100VA
Dimensions 310 (W) x 270 (D) x 300 (H) mm
Weight Approx. 5kg
Safety approval CE approved