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Karl Fischer Coulometric Titrator - HI934

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For scientists and professionals who need exact water content determination from 1 ppm to 5%, our new generation of the Coulometric Karl Fischer Titrator is engineered to meet or exceed your technical requirements while delivering a lower cost of ownership. With cutting-edge features packed into a compact design, this titrator delivers accurate results and requires less space in the lab. Get accurate water content determination at the push of a button. Designed for the modern lab, this karl fischer titrator is the perfect fit for your testing environment.

  • Compact design will save space in the lab without compromising your results.
  • Durable heat and chemical resistant body.
  • Sealed solvent system helps to keep water out of the system, while giving you minimal exposure to the reagents.

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HI933 Right Front Compress

Dynamic Titrant Dosing

The titration speed feature allows for timely and accurate titration results by relating the amount of iodine generated to the mV response from the Karl Fischer reaction.

Selectable Endpoint Criteria

The HI934 employs a dual platinum pin electrode for bivoltammetric endpoint determination. Users may choose termination criteria based on mV stability times or drift rates.

Drift Rate Compensation

The HI934 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.

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.

Titration Results Averaging

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

Precision Iodine Generation

Hanna’s dosing algorithm allows for an extremely small amount of iodine necessary for the Karl Fischer reaction to be generated electrolytically using a pulsed current up to 400 mA delivering titrant accurately and precisely.


Chemically Resistant Titration Vessel and Tubing

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


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.


Molecular Sieve 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.


Digital Built-in Stirrer

Automatic, integrated magnetic stirrer adjustable from 200-2000 RPM with optical feedback for automatic speed control.


Interface & Display

Simple and 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.

Interactive Color Display

A large, color LCD screen clearly shows the chosen titration method along with results, units, 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.

Titrator Data & Reporting

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, electrode ID codes, and calibration information.


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 HI934 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 HI904 Karl Fischer system.


Connectivity & 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.



Specification NameDetail
Range1 ppm to 5%
Resolution0.1ppm to 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 Typesliquid or solid with external dissolution / extraction
Pre-Titration Conditioningautomatic
Background Drift Correctionautomatic or user-selectable value
Endpoint Criteriafixed mV persistence, relative drift stop or absolute drift stop
Result Statisticmean, standard deviation
Generator Configurationdiaphragm or diaphragm-less
Generator Current Controlautomatic or fixed (400 mA)
Generator Type Detectionautomatic
Titration Vesseloperating volume between 100 – 200 mL
Solvent Handling SystemSealed system with integrated diaphragm air pump
Sensor TypeHI76330 dual platinum pin polarization electrode
Sensor ConnectionBNC
Polarization Current1, 2, 5, or 10 μA
Voltage Range2 mV to 1100 mV
Voltage Resolution0.1 mV
Accuracy (@25ºC/77ºF)±0.1%
Programmable Stirrermagnetic, optically regulated, digital stirrer; 200 to 2000 rpm; resolution 100 rpm
Display5.7” (320 x 240 pixel) color LCD
Methodsup to 100 (standard and user) methods
Logging Dataup to 100 complete titration reports and drift rate reports can be stored
Peripherals (Rear)PC Connection, USB Flash Drive, Analytical Balance, Printer, External PC Keyboard
GLP ConformityGood Laboratory Practice and instrument data storage and printing
LanguagesEnglish, Portuguese. Spanish, and French
Enclosure MaterialABS, PC and Stainless Steel
Operating Environment10 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 Supply100-240 VAC; “-01” models, US plug (type A); “-02” models, European plug (type C)
Dimensions315 x 205 x 375 mm (12.4 x 8.1 x 14.8 “)
Weightapprox. 4.3 kg (9.5 lbs.) with 1 pump, stirrer and sensors

Additional Informations

Additional information

Titrator Diaphragm

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