for Water Content Determination
The HI904 Karl Fischer (KF) Coulometric Titrator is an automatic titrator that complements our wide range of products dedicated to efficient and accurate laboratory analysis. The HI904 analyzes for water content ranging from 1 ppm to 5%. This powerful titrator effectively monitors the KF reaction, detects the endpoint, and performs all necessary calculations and graphing.
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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.
The glass titration cell and PTFE tubing is designed to withstand the harsh solvents and reagents involved in Karl Fischer reactions.
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 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.
Automatic, integrated magnetic stirrer adjustable from 200-2000 RPM with optical feedback for automatic speed control.
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.
The HI904 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.
Successive results from a titration method may be averaged with recording of the standard deviation.
The HI904 employs a dual platinum pin electrode for bivoltammetric endpoint determination. Users may choose termination criteria based on mV stability times or drift rates.
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.
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.
A large, color LCD screen clearly shows the chosen titration method along with results, units, drift rate and mV value.
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.
Each titration report is fully customizable so users can ensure they are storing and filing the appropriate data required for their application and procedures.
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 and calibration information.
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.
The HI904 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.
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.
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.
Sample size may be automatically entered from any laboratory analytical balance with a RS232 serial output saving time and labor.
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.
HI900 Series titration systems can be easily incorporated into any existing GLP data management program.
Titration general options can be configured to user requirements
Titration results can be viewed on-screen or transferred to a USB storage device
Titration graphs can be viewed on-screen or saved as images and transferred along with titration report
Interface displays real-time monitoring of water content and results
The HI904 keeps the solvent dry between samples and monitors the drift rate
Titration results are displayed with options to average results or a user-customized report
The HI904 recommends a sample size based on expected results
Enter sample weight automatically from any laboratory analytical balance with RS232 serial output
Customize methods for any application
1 ppm to 5%
0.1ppm to 0.0001%
%, ppm, ppt, mg/g, μg/g, mg, μg, mg/mL, μg/mL, mg Br/100g, g Br/100g, mg Br, g Br
liquid or solid (external dissolution / extraction)
operating volume between 100 – 200 mL
Reagent Handling System
sealed system with integrated diaphragm air pump and beaker adapter
diaphragm or diaphragm-less
automatic or fixed (400 mA)
Electrode Type Detection
Background Drift Correction
automatic or user-selectable value
fixed mV persistence, relative drift stop or absolute drift stop
mean, standard deviation
Type / Connection
dual platinum pin, polarization electrode / BNC connector
1, 2, 5, or 10 μA
2 mV to 1100 mV
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 HI904 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
5.7” (320 x 240 pixel) color LCD
up to 100 (standard and user) methods
up to 100 complete titration reports and drift rate reports can be stored
Good Laboratory Practice and instrument data storage and printing
English, Portuguese, Spanish, and French
ABS plastic and steel
“-01” models, US plug (type A)
“-02” models, European plug (type C)
10 to 40°C, up to 95% RH
-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.)
HI904D-01 and HI904D-02 are supplied with diaphragm, HI904-01 and HI904-02 are supplied without diaphragm.
All Models Include: dual platinum pin electrode, air pump assembly, titration vessel assembly (glass vessel, accessory port stopper, sample port cap and septum, stir bar, desiccant, desiccant cartridge, fittings), vessel support with adapter, pump locking screw with plastic head, reagent bottle assembly ( bottle cap, desiccant, desiccant cartridge, fittings, tubing (silicone and PTFE)), water bottle assembly (waste bottle, bottle cap, desiccant, desiccant cartridge, fittings, tubing (silicone and PTFE)), calibration key, reagent exchange adapter, accessory holder assembly, joint grease, Karl Fischer generator electrode (removable generator electrode cable), USB cable, USB storage device, HI900 PC application software, power adapter, quality certificate and instruction manual binder.