The HI904 Karl Fischer Coulometric Titrator is an automatic titration system for the measurement of trace amounts of water in various samples. The Coulometric Titrator complements our wide range of titration 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 Karl Fischer reaction, detects the endpoint, and performs all necessary calculations and graphing.
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.
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.
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.
Two styles of generators are available for the HI904; a fritted design ideal for samples with low water content and high accuracy demand; and a fritless generator allowing for easier cleaning and maintenance.
Our 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 iodine 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.
A large, color LCD screen clearly shows the chosen titration method along with results, units, total water, drift rate, and mV value.
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.
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.
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.
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.
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.
| Weight | 9.07 kg |
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| SKU | HI904-01-web |
| Name | Karl Fischer Coulometric Titrator HI904 |
| Titration Principle | coulometric Karl Fischer |
| Titration Range | 1 ppm to 5% |
| Titration Resolution | 0.1ppm to 0.0001% |
| Measurement Units | %, ppm, ppt, mg/g, µg/g, mg, µg, mg/mL, µg/mL, mg Br/100g, g Br/100g, mg Br, g Br |
| Sample Type | liquid or solid with external dissolution / extraction |
| 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 Type | dynamic with optional pre-dispensing rate |
| Result Statistics | mean, standard deviation |
| Titration Vessel | operating volume between 100 – 200 mL |
| Solvent Handling System | sealed system, integrated diaphragm air pump |
| Connection Type | BNC |
| Polarization Current | 1, 2, 5, or 10 µA |
| mV Range | 2 mV to 1100 mV |
| mV Resolution | 0.1 mV |
| mV Accuracy | ±0.1% |
| Stirrer Type | magnetic, optically regulated, digital stirrer |
| Stirrer Speed | 200 to 2000 rpm |
| Stirrer Resolution | 100 rpm |
| Titrator Methods | up to 100 methods (standard and user-defined) |
| Reports | up to 100 complete titration reports and drift rate reports can be stored |
| GLP Conformity | Good Laboratory Practice and instrument data storage and printing |
| Peripheral Devices | connections for VGA display, PC-keyboard, parallel printer, USB device input, RS232 |
| Display | 5.7 in. (320 x 240 pixel) color LCD |
| Keypad | polycarbonate |
| Languages | English, Portuguese. Spanish, and French |
| Power Supply | 100-240 VAC; -01models, US plug (type A); -02models, European plug (type C) |
| Environment | operating: 10 to 40°C (50 to 104°F), up to 95% RH storage: -20 to 70°C (-4 to 158°F), up to 95% RH |
| Dimensions | 390 x 350 x 380 mm (15.3 x 13.8 x 14.9 in) |
| Weight | approximate 10 kg (22 lbs) |
To empower customers to achieve quality
by supplying intuitive, accurate, and reliable analytical instruments with exceptional customer service and value.
We take pride in every product we build. From an original idea, to a completed product ready for testing. We oversee every aspect of the manufacturing process. It is this level of attention to detail that sets us apart.
To empower customers to achieve quality by supplying intuitive, accurate, and reliable analytical instruments with exceptional customer service and value.
We take pride in every product we build. From an original idea, to a completed product ready for testing. We oversee every aspect of the manufacturing process. It is this level of attention to detail that sets us apart.
To empower customers to achieve quality by supplying intuitive, accurate, and reliable analytical instruments with exceptional customer service and value.
We take pride in every product we build. From an original idea, to a completed product ready for testing. We oversee every aspect of the manufacturing process. It is this level of attention to detail that sets us apart.
