Product Description

HI-904 Karl Fischer Coulometric Titrator for moisture determination

The HI-904 Karl Fischer Coulometric titrator is an automatic titrator that complements our wide range of products dedicated to efficient and accurate laboratory analysis. Measures 1ppm to 5% water content.


The HI-904 analyses for water content ranging from 1ppm to 5%. This powerful titrator effectively monitors the KF reaction, detects the endpoint, and performs all necessary calculations and graphing.

Features include:

  • Precision dosing system by generator electrode €“ 400mA pulsed current, available with or without a diaphragm
  • Molecular sieve desiccant €“ prevents the ingress of ambient humidity into the sealed solvent system while maintaining full titrator functionality; Regenerated at 300°C
  • Sealed Cell €“ generator electrode; Dual pin bivoltammetric platinum sensing electrode; Molecule sieve desiccant cartridge; Replaceable septum for liquid sampling port; Accessory port
  • Built-in stirrer €“ Automatic, integrated magnetic stirrer adjustable from 200-2000RPM; optical feedback for automatic speed control
  • Sealed solvent system €“ Change to fresh reagent in a matter of seconds without opening titration vessel; minimises exposure to ambient humidity; PTFE tubing is resistant to harsh KF Chemicals; sealed tube holder to collect PTFE tube after exchanging reagent
  • PTFE bottle cap €“ Caps fit any GL45-threaded bottle; chemical-resistant caps and fittings; removable desiccant cartridges

Technical Data
Range <1 ppm to 5%
Resolution 0.1 ppm (0.0001%)
Result Units %, ppm, ppt, mg/g, µg/g, mg, µg, mg/mL, µg/mL, mg Br/100g, g Br/100g, mg Br, g Br
Sample Type liquid or solid
Titration Vessell operating volume between 100-200ml
Reagent handling system sealed system with integrated diaphragm pump and beaker adapter
Generator electrode:
Configuration Diaphragm or diaphragm-less
Current Control Automatic or fixed (400 mA)
Electrode Type Detection Automatic
Pre-Titration Conditioning automatic
Background Drift Correction automatic or user selectable value
Endpoint Criteria fixed mV persistence, relative drift stop or absolute drift stop
Dosing dynamic
Result Statistic mean, standard deviation
Detector Electrode:
Type dual platinum pin, polarisation electrode
Connection BNC
Polarisation Current 1, 2, 5, 10 µA
Voltage Range 2 mV to 1100 mV
Voltage Resolution 0.1 mV
Accuracy (@25ºC/77ºF) ±0.1%
Peripheral Devices:
PC easily view, transfer, print or delete methods and reports via HI-900 PC application
USB Flash Drive easily upgrade software or transfer methods and reports between devices using a USB drive
Laboratory Analytical Balance RS232 to connect any laboratory balance
Printer print directly from the HI-904 to a printer via parallel port
Monitor instrument status and titrations can be viewed on a larger screen using any VGA compatible external monitor
Keyboard alphanumeric text can be entered using an optional PS/2 keyboard
Graphic Display 5.7€ (320 x 240 pixel) color LCD
Titration Methods up to 100 (standard and user) methods
Data Storage up to 100
GLP Conformity Good Laboratory Practice and instrument data storage and printing
Languages English, Portuguese, French and Spanish
Enclosure Material ABS plastic and steel
Keypad polycarbonate
Power Supply 230VAC, 50/60 Hz;
Operating Environment 10 to 40ºC, up to 95% RH
Storage Environment 20 to 70ºC, up to 95% RH
Dimensions 390 x 350 x 380 mm (15.3 x 13.8 x 14.9€)
Weight approximately 10 kg (22 lbs.)

Order Information:

HI-904-02 (230V) are supplied with dual platinum pin electrode, 5 mL burette assembly with tubing, air pump assembly with tubing, beaker and bottle top assemblies and all fittings, desiccant cartridges (4) with indicating desiccant, stir bar, waste bottle, calibration key, USB cable, power cable, HI-900 PC application, USB flash drive, quality certificate, ISO 8655 burette compliance report and instruction manual binder.

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