HANNA Instruments Logo
SKU HI903-02 Category

Karl Fischer Volumetric Titrator HI903

All prices are VAT excluded and without shipping costs, unless otherwise stated.

for Moisture Determination

The HI903 Karl Fischer Volumetric Titrator is an automatic titrator that complements our wide range of products dedicated to efficient and accurate laboratory analysis. The HI903 analyzes for water content ranging from 100 ppm to 100%.

This powerful titrator automatically dispenses the titrant, detects the endpoint, and performs all necessary calculations and graphing.

Buy now with confidence

Request a quotation

Request quotation

Request a quotation

This product cannot be purchased online. Fill in the form to get a quotation, thank you.

Burettes and Dosing System

Precision Dosing Pump

Our unmatched 40,000 step piston driven pump is capable of delivering as little as 0.125 µL of titrant accurately and precisely.

Chemically Resistant Tubing & Syringe

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 and Solvent System

Efficient Sample Handling

The HI903 features a quick-remove sample port with a replaceable rubber septum allowing for fast and easy sample introduction to the titration vessel. An integrated magnetic stirrer ensures homogeneity for an accurate and speedy reaction.

Chemically Resistant Titration Vessel

The glass and PTFE titration cell and fittings are designed to withstand the harsh solvents and reagents involved in Karl Fischer reactions.

Sealed Solvent System

The titration vessel is completely sealed to minimize exposure to ambient humidity, keep the system dry, and reduce titrant consumption while saving time between titrations. Solvent may be exchanged in a matter of seconds without opening the titration vessel.

Visually Recognizable Desiccant

A rechargeable, color-indicating, silica gel desiccant prevents the ingress of ambient humidity into the sealed system while maintaining full titrator functionality. The desiccant color change allows a user to recognize when it’s adsorption capacity has depleted and is ready for replacement or recharging.

Titration Capabilities

Dynamic Titrant Dosing

The dynamic dosing feature allows for timely and accurate titration results by relating the titrant volume dosed to the mV response from the titration reaction. This provides for larger doses near the beginning of a titration and smaller, more precise doses near the titration endpoint.

Drift Rate Compensation

The HI903 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 titration method may be averaged with recording of the standard deviation.

Titrant Recordkeeping

The HI903’s titrant database can store information for up to 20 titrants. The database may be programmed to remind a user when to standardize their titrant, reducing error in analysis.

Selectable Endpoint Criteria

The HI903 employs a dual platinum pin electrode for bivoltammetric endpoint determination. Users may choose termination criteria based on mV stability times or drift rates.

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.

Interface and Display

Interactive Color Display

A large, color LCD screen clearly shows the chosen titration method along with results, units, dosing size, titration volume, drift rate, and mV value.

Detailed Titration Graphs

A real-time titration curve can be displayed during each titration; this feature is useful when new methods are tested or when a procedure requires optimization.

Simple & Quick Navigation

Virtual key selections present on the display allow for simple and quick navigation between screens and menus without getting lost in a nest of information.

Data and Storage

Customizable Titration Reports

Each titration report is fully customizable so users can ensure they are storing and filing the appropriate data required for their application and procedures.

Flexible GLP Management

All necessary GLP (Good Laboratory Practice) information can be recorded with each sample including: sample identification, company and operator name, date, time, and electrode ID codes.

Effortless Data Transfer

Data can easily be transferred to a USB flash drive or PC with the Hanna HI900PC application software. The USB port allows for the transfer of titration methods, titration reports, and software upgrades via USB flash drive.

Methods of Analysis

Customizable Methods

The HI903 can store up to 100 user-defined or standard titration methods. Each method may be customized and optimized for performance based on application and user requirements.

Titration Method Support

Onsite installation, training, and customization is available from one of our Applications or Service experts. Hanna offers continued support via phone or webinar for any questions you might have along the way.

Adaptable 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 titrator. Ask our Sales Consultants which standard methods are possible with our HI903 Karl Fischer system.

Connectivity and Functionality

Configurable Balance Interface

Sample size may be automatically entered from any laboratory analytical balance with a RS232 serial output saving time and labor.

Multiple Peripherals

Users can print reports directly from the titrator using a standard parallel printer. An external monitor and keyboard may be attached for added versatility, as well as an analytical balance for automatic sample mass entry for titrations.

Versatile Data Management

HI900 Series titration systems can be easily incorporated into any existing GLP data management program.

  • Easily record all necessary GLP information with every sample, such as sample identification, company and operator name, date, time, electrode ID codes and calibration information
  • Data can be transferred to a PC using Hanna HI900PC software
  • The USB port allows for the easy transfer of methods, reports and software upgrades via a USB flash drive
  • Users can print reports of analyses directly from the titrator using a standard parallel printer
  • An external monitor and keyboard can be attached for added versatility
Customizable reports

Titration reports are fully customizable

Titration reports

Titration results can be viewed on-screen or transferred to a USB storage device

Titration graphs

Titration graphs can be viewed on-screen or saved as images and transferred along with titration report


The HI903 comes with a standard method pack


The HI903 keeps the solvent dry between samples and corrects for water entering the cell (drift rate)


Titration results are displayed with links to average results or a user-customized report

Titrant database

The HI903 stores standardization information for up to 20 titrants and displays a reminder when standardization is due

Fully configurable balance interface

Enter sample size automatically from any laboratory analytical balance with RS232 serial output

Fully customizable titration methods

Customize methods for any application




100 ppm to 100%


1 ppm to 0.0001%

Result Units

%, ppm, mg/g, μg/g, mg, μg, mg/mL, μg/mL, mg/pc, μg/pc

Sample Type

liquid or solid


Pre-Titration Conditioning


Background Drift Correction

automatic or user-selectable value

Endpoint Criteria

fixed mV persistence, relative drift stop or absolute drift stop


dynamic with optional pre-dispensing rate

Result Statistic

mean, standard deviation

Clip Lock™ Burette System

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


5 mL precision ground glass with PTFE plunger


motor-driven 3-way, PTFE liquid contact material


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



HI76320 dual platinum pin, polarization electrode



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 (@25°C/77°F)

±0.1 %



magnetic, optically regulated, digital stirrer


200-2000 rpm


100 rpm

Peripheral Devices


easily view, transfer, print or delete methods and reports via HI900PC 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


print directly from the HI903 to a printer via parallel port


instrument status and titrations can be viewed on a larger screen using any VGA-compatible external monitor


alphanumeric text can be entered using an optional PS/2 keyboard

Additional Specifications

Graphic Display

5.7” (320 x 240 pixel) color LCD

Titration Methods

up to 100 (standard and user) methods

Data Storage

up to 100 complete titration reports and drift rate reports can be stored

GLP Conformity

Good Laboratory Practice and instrument data storage and printing


English, Portuguese, Spanish, and French

Enclosure Material

ABS plastic and steel




100-240 VAC
“-01” models, US plug (type A)
“-02” models, European plug (type C)

Operating Environment

10 to 40°C, up to 95% RH

Storage Environment

-20 to 70°C, up to 95% RH


390 x 350 x 380 mm (15.3 x 13.8 x 14.9”)


approximately 10 kg (22 lbs.)

Ordering information

HI903-01 and HI903-02 are supplied with HI76320 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, HI900PC application, USB flash drive, quality certificate, ISO 8655 burette compliance report and instruction manual binder.

Additional Informations

Additional information


Meter type

Quotation request

Note: fields marked with * are mandatory.

Can't you find what you need?

We have over 3.000 products in our catalogue. Register now and download the catalogue or contact us and see if we can help you.


Login to your account or create one right now to access to our exclusive content.