For scientists and professionals who need exact water content determination from 0.01 to 100%, the HI903 is a reliable Volumetric Karl Fischer Titrator that gives results in minutes.

Unlike other Karl Fischer titrators, the HI903 features an ultra-high precision dosing system and a specialized burette design for unmatched accuracy.

A Better Volumetric Karl Fischer Titrator Experience

Our friendly technical consultants take pride in helping make your titrator selection easy – every step of the way. Our experts are here to guarantee you have a positive experience, from onsite installation and training to customization and continued support.

Volumetric Karl Fischer Titrator Capabilities

Dynamic Titrant Dosing

The dynamic titration speed allows for timely and accurate titration results by relating the amount of iodine generated to the mV response from the Karl Fischer reaction. This provides for a larger generation of iodine near the beginning of a titration and more precise pulses near the titration endpoint.

Drift Rate Compensation

The HI903 Volumetric Karl Fischer Titrator automatically adjusts the titration calculation to account for the effects of any ambient humidity entering the titration cell. This provides a more accurate result by correcting for water not present in the actual sample.

Titration Results Averaging

Successive results from a karl fischer titration method may be averaged with recording of the standard deviation.

Multistage Cell Preparation

A pre-titration stage eliminates residual water present in the solvent and the cell, providing a reliable baseline start to analysis. Standby mode then keeps the solvent dry between titrations and when the titrator is not in use.

Burettes & Dosing System

Be confident in your results.

Our unmatched 40,000 step piston driven dosing pump is capable of dosing extremely small and highly accurate volumes of reagent, helping you achieve a very precise endpoint.


Engineered to be strong

Aspiration and dispensing tubes are constructed of durable, chemically resistant PTFE and feature a light-blocking polyurethane outer sleeve to protect light sensitive reagents.


Anti-Diffusion Dispensing Tip

A specially designed glass dispensing tip delivers titrant precisely into high turbulence mixing zones, ensuring a rapid reaction. Its angular construction helps prevent titrant from diffusing into the sample solvent.

Titration & Solvent System

Chemically Resistant Vessel & Tubing

The glass titration cell and PTFE tubing is designed to withstand the harsh solvents and reagents involved in Karl Fischer titration.

Sealed Solvent System

Ground glass joints completely seal the glass titration cell, minimizing exposure to ambient humidity, keeping the system dry, and reducing reagent consumption while saving time between titrations. Solvent may be exchanged in a matter of seconds with a quick fitting adjustment.

High Efficiency Desiccant

High efficiency molecular sieve desiccant helps maintain low and stable drift rates within the titration cell while preventing the ingress of ambient humidity into the sealed solvent system.

Interface & Display

All of your important information is displayed.

Our large color display shows you everything you need to know during testing.

Track your progress in real-time.

Our live titration curve helps you quickly recognize patterns and problems that may arise during your analysis.

Explore titrator menus with ease.

Custom keys allow you to clearly navigate between screens so you don’t get lost.

Titrator Data & Reporting

Highlight your most important information.

Final reports are customizable so you can make sure you are viewing and storing your most important information.

Safeguard the integrity of your data.

Our software allows you to record full GLP (Good Laboratory Practice) data so there is no need to compromise the quality of your results.

Move your information easily across devices.

Use our software or a USB to conveniently transfer files between your titrator and computer.

Connectivity & Functionality

HI902C Angled

View and print reports easily.

You can print reports directly from the titrator with a connected printer and conveniently view results with a connected monitor.

Take advantage of the versatility.

Connect the devices that help you most, whether it be an analytical balance for automatic sample entry or a printer for your reports.

Titrator Support & Methods

We’ve got people here to help.

When you purchase one of our titrators, you’re not just getting an instrument – you’re getting our whole team of experts dedicated to your success. Get the level of onsite support you need with our Standard, Silver, Gold, and Platinum onsite installation and maintenance plans.



Customizable Methods

The HI904 Coulometric Karl Fischer Titrator can store up to 100 user-defined or standard Karl Fisher titration methods. We offer optimized titration methods for a wide range of industries. If we don’t have your method in our library, we’re ready to help meet your needs.



Align with your standard methods.

Our technical experts can program and customize standard methods developed by such affiliations as ISO, ASTM, AOAC, AOCS, EPA, and more directly onto your Karl Fischer Titrator.

Titration Specifications

Range 100 ppm to 100%
Resolution 1 ppm to 0.0001%
Result Units %, ppm, mg/g, μg/g, mg, μg, mg/mL, μg/mL, mg/pc, μg/pc
Sample Types liquid or solid
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 with optional pre-dispensing rate
Result Statistic mean, standard deviation

Dosing System Specifications

Dosing Pump Resolution 1/40000 of the burette volume (0.125 μL per dose) with 5 mL burette
Dosing Pump Accuracy ±0.1% of full burette volume
Syringe 5 mL precision ground glass with PTFE plunger
Valve motor-driven 3-way, PTFE liquid contact material
Tubing PTFE with light block and thermal jacketing
Dispensing Tip glass, fixed position, anti-diffusing
Titration Vessel conical with operation volume between 50-150 mL
Solvent Handling System sealed system, integrated diaphragm air pump

Sensor System Specifications

Sensor Type HI76320 dual platinum pin polarization electrode
Sensor Connection BNC
Polarization Current 1, 2, 5, 10, 15, 20, 30 or 40 μA
Voltage Range 2 mV to 1000 mV
Voltage Resolution 0.1 mV
Accuracy (@25ºC/77ºF) ±0.1%

Additional Specifications

Programmable Stirrer magnetic, optically regulated, digital stirrer; 200 to 2000 rpm; resolution 100 rpm
Display 5.7” (320 x 240 pixel) color LCD
Methods up to 100 methods (standard and user-defined)
Logging Data up to 100 complete titration reports and drift rate reports can be stored
Peripherals (Rear) connections for VGA display, PC-keyboard, parallel printer, USB device input, RS232
GLP Conformity Good Laboratory Practice and instrument data storage and printing
Languages English, Portuguese. Spanish, and French
Enclosure Material ABS plastic and steel
Keypad polycarbonate
Operating Environment 10 to 40°C (50 to 104°F), up to 95% RH
Storage Environment -20 to 70°C (-4 to 158°F), up to 95% RH
Power Supply 100-240 VAC; “-01” models, US plug (type A); “-02” models, European plug (type C)
Dimensions 390 x 350 x 380 mm (15.3 x 13.8 x 14.9 in)
Weight approximately 10 kg (22 lbs.)