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Hanna Instruments HI-903-02 Karl Fischer Volumetric Titrator

Karl Fischer Volumetric Titrator for moisture determination

SKU: HI-903-02 Category:


Precision titrant delivery system

  • 40,000 step, piston dosing pump
  • Accurate to 0.1%
  • Delivers as little as 0.125 µL of titrant
  • Precision ground, 5 mL glass burette with PTFE plunger, PTFE burette tubing, and polyurethane tube jacketing (thermally insulating, light blocking)
  • Glass anti-diffusion dispensing tip
  • Clip-Lock™ exchangeable burette system enables users to exchange reagent burettes in a matter of seconds

Sealed solvent system

  • Change to fresh solvent in a matter of seconds without opening the titration vessel
  • Minimizes exposure to ambient humidity, reducing titrant consumption and saving time
  • PTFE solvent tubing is resistant to harsh KF solvents and titrants

Beaker top

  • Chemically-resistant reaction vessel cap and fittings
  • Quick-remove sample port plug with replaceable silicone rubber septum

Anti-diffusion burette tip

  • Delivers titrant in high turbulence zone, ensuring rapid reaction
  • Prevents unwanted diffusion of titrant

Built-in stirrer

  • Automatic, integrated magnetic stirrer adjustable from 200-2000 RPM
  • Optical feedback for automatic speed control
  • Optional external stirrer available

Rechargeable indicating desiccant

  • Prevents the ingress of ambient humidity into the sealed solvent system while  maintaining full titrator functionality
  • Minimizes changes to titrant titre
  • Indicates when adsorption capacity is depleted
  • Regenerates at 150°C

PTFE bottle cap

  • Caps fit any GL45-threaded bottle
  • Chemically resistant caps and fittings
  • Removable desiccant cartridges

Adaptable, High Accuracy Moisture Determination

The HI 903 Karl Fischer Volumetric Titrator for moisture analysis is an extension of HANNA’s highly successful potentiometric titrator platform. The HI 903 combines an ultra-high precision titrant delivery system with optically regulated magnetic stirring, sophisticated endpoint determination, dynamic dosing and background drift correction algorithms.

The result is an extremely adaptable titrator capable of titrating with superior accuracy and precision even for samples with low moisture content. The HI 903 dispenses the titrant, detects the endpoint and performs all necessary calculations automatically.

The HI 903 comes equipped with a solvent handling system to reduce cell conditioning time and can be connected directly to your laboratory balance via serial interface.

The HI 903’s powerful software and intuitive menus are easily navigated on the large, color LCD display making it simple to view results. Choose from included methods or develop a custom method for almost any application or sample type. Using a USB flash drive or connecting the titrator to the HI 900PC application, methods (standard and user) can be upgraded, stored or deleted.

Clip-Lock™ Exchangeable Burette System

With Clip-Lock™, it only takes a couple of seconds to exchange the reagent burettes to perform a different titration.

The Clip-Lock™ exchangeable burette system prevents cross contamination while reducing loss of time and reagents. Burettes simply slide out for quick exchanges, and detaching the aspiration and dispensing tubes from the titrant bottles is easy.

Interrupting an important cycle of analysis due to a malfunctioning burette is a thing of the past. With the HANNA Clip-Lock™ system you can simply substitute the burette and complete all your tests with the same titrant! Having several prepared burettes on hand will make the HANNA HI 903 one of the fastest and most versatile titration systems available.

Order Information:

HI 903-01 (115V) and HI 903-02 (230V) are supplied with dual platinum pin electrode, dosing pump, 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 900PC application, USB flash drive, quality certificate, ISO 8655 burette compliance report and instruction manual binder.


Determination Background Drift Connection Automatic; User Selectable Value
Determination Dosing dynamic with optional pre-dispensing rate
Determination Endpoint Criteria Fixed mV persistence, relative drift stop, or absolute drift stop
Determination Pre Titration Conditioning Automatic
Determination Result Statistic Mean, Standard Deviation
Dimensions 390 x 350 x 380 mm (15.3 x 13.8 x 14.9”)
Electrode Polarization Current 1, 2, 5, 10, 15, 20, 30 or 40 μA
Electrode Type/Connection HI76320D dual platinum pin, polarization electrode / BNC
Power Supply “-01” model: 115VAC, 50/60 Hz; “-02” model: 230VAC, 50/60 Hz;
Stirring speed 200-2000 rpm
Titration Methods up to 100 (standard and user) methods
Weight approximately 10 kg (22 lbs.)
Languages English, Portuguese and Spanish
GLP Conformity Good Laboratory Practice and instrument data storage and printing
Operating Environment 10 to 40ºC, up to 95% RH
Storage Environment -20 to 70ºC, up to 95% RH
Data Storage up to 100 complete titration reports and drift rate reports can be stored
Electrode Voltage Range 2 mV to 1000 mV
Electrode Voltage Resolution 0.1 mV
Electrode Accuracy (@25°C/77°C) ±0.1 %
Graphic Display 5.7” (320 x 240 pixel) color LCD
Titration Range 100 ppm to 100%
Titration Resolution 1 ppm (0.0001%)
Titration Result Units %, ppm, mg/g, μg/g, mg, μg, mg/mL, μg/mL, mg/pc, μg/pc
Titration Sample Type liquid or solid
Clip Lock™ Exchangeable Burette System. Dosing Pump Resolution 1/40000 of the burette volume (0.125 μL per dose) with 5 mL burette
Clip Lock™ Exchangeable Burette System. Dosing Pump Accuracy ±0.1% of full burette volume
Clip Lock™ Exchangeable Burette System. Syringe 5 mL precision ground glass with PTFE plunger
Clip Lock™ Exchangeable Burette System. Valve motor-driven 3-way, PTFE liquid contact material
Clip Lock™ Exchangeable Burette System. Tubing PTFE with light block and thermal jacketing
Clip Lock™ Exchangeable Burette System. Dispensing Tip glass, fixed position, anti-diffusing
Clip Lock™ Exchangeable Burette System. Titration Vessel conical with operation volume between 50-150 mL
Clip Lock™ Exchangeable Burette System. Solvent Handling System sealed system, integrated diaphragm air pump
Stirrer Type magnetic, optically regulated, digital stirrer
Stirrer Resolution 100 rpm
Peripheral Devices. PC easily view, transfer, print or delete methods and reports via HI900PC application
Peripheral Devices. USB Flash Drive easily upgrade software or transfer methods and reports between devices using a USB drive
Peripheral Devices. Laboratory Analytical Balance RS232 to connect any laboratory balance
Peripheral Devices. Printer print directly from the HI903 to a printer via parallel port
Peripheral Devices. Monitor instrument status and titrations can be viewed on a larger screen using any VGA-compatible external monitor
Peripheral Devices. Keyboard alphanumeric text can be entered using an optional PS/2 keyboard
Enclosure Material ABS plastic and steel
Keypad polycarbonate



Additional information

Weight 10 kg