Automatic Titration System, HI 901 | HANNA Instruments

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Home > Potentiometric Titrator > Potentiometric Titrator

HI 901

Automatic Titration System

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  • Precise dosing system (accuracy under 0.1% of burette volume)
  • Supports up to 100 titration methods (standard and user defined)
  • Clip Lock™ — change burettes quickly with auto burette recognition
  • Dynamic/Linear dosing feature
  • Fixed end point potential or pH
  • Equivalence point detection (first derivative and second derivative)
  • The results are displayed directly in the selected units
  • Titration graph can be displayed on-screen and saved
  • User customized reports can be printed, saved on floppy disk or transferred to PC via RS232 interface
  • Reminders for titrant age and standardization expiration
  • Self diagnostic features for peripheral devices including pump, valve, burette and stirrer


The HI 901 is an automatic titrator that compliments our wide range of products dedicated to quick and accurate laboratory analysis.

This titration system is provided with a host of numerous features suitable for routine sample analysis and performs acid/base and potentiometric titrations. The HI 901 can also drive two pumps separately.

This versatile titrator supports up to 100 methods: standard or user defined. When powered on, the instrument initiates an internal diagnostics check and then readies itself for the first titration of the day. A large LCD screen clearly shows the chosen method, correlated information and also indicates which parameters may be adjusted. A real-time titration curve is shown on the display; this feature is useful when new methods are tested or when a procedure needs to be optimized. At the end of the titration, all data, including the graph, are automatically stored in memory and can be copied to disk via the built-in floppy drive or through direct connection with the serial cable supplied with the titrator. The titrators are equipped with an RS485 serial port.

Burette maintenance is simple and completely automated. The user can decide to purge it or wash it and can select how many washings to perform. With our exclusive Clip Lock™ system for burette replacement, changing from one titrant to another is done in a flash! Often, preliminary titration operations are very long and arduous. A burette often needs to be adjusted for correct dosing, which extends waiting time for new sample analysis. HANNA has engineered a way to solve this problem.

The innovative Clip Lock™ system allows users to change burettes in two simple steps, passing from one titrant to the next without any problem. Additionally, HI 901 automatically recognizes the volume of the new burette.

Users can connect pH or ORP electrodes to this unit, as well as create a complete workstation with a PC, monitor, keyboard and printer. This unit complies with GLP specifications, providing validation support for analysis. All GLP information from each sample can be stored, including ID number, date and time of analysis, electrode ID code and last calibration date.

Up to 100 reports of analysis, complete with titration curve graphing is possible. A calibration "time-out" can be set and the user can be advised when the pH electrode needs to be calibrated. The instrument's status can be viewed clearly on the large LCD screen. Contained in the set-up menu, features like language, display brightness, resolution, pH electrode calibration, date and hour can be adjusted. During analysis, the titration is displayed in real-time together with the stored data. Date, hour, temperature (when probe is connected) and warning messages such as a pH electrode calibration message can all be displayed for your convenience.



Order Information:
HI 901-01 (115V) and HI 901-02 (230V) is supplied with (1) 25 mL glass burette, (1) burette driver assembly, power adapter and instructions.

  • Specifications
  • Downloads
Range mV -2000.0 to 2000.0 mV
pH -2.000 to 20.000 pH
Temperature -5.0 to 105.0°C/23 to 221°F/268.2 to 378.2 K
Resolution mV 0.1 mV
pH 0.1/0.01/0.001 pH
Temperature 0.1°C/0.1°F/0.1K
mV ±0.1 mV
Burette Sizes   5, 10, and 25 mL
Burette Resolution   1/40000
Display Resolution   0.001 mL
Dosing Accuracy   ±0.1% of full burette volume
Display   graphic LCD, 320 x 240 pixel LCD
Languages   English, Italian, Portuguese, Spanish
Methods   up to 10,000 methods (standard and user-defined)
Burette Auto-Detection   burette size is automatically recognized when inserted into the unit
Programmable Stirrer   propeller type, 100-2500 RPM, automatically held within 10% of the set value, resolution 100 rpm
Flow Rate   user-selectable from 0.1 mL/min to 2 x burette volumes/min
pH/mV Measurement   titrators can also perform direct pH and mV measurements
Temperature Compensation   manual or automatic (ATC)
pH Calibration   manual or automatic at one to five points with four buffer sets or custom buffers
Potentiometric Titrations   acid-base (pH or mV-Mode), redox, precipitation, complexometric, non-aqueous,ion-selective, argentometric (in mV-mode only)
Titration Methods   fixed mV or pH end-point detection & first equivalency point detection (with the 1st or 2nd derivatives)
Measurement Units   user specified expression of concentration units to suit specific calculation requirements
Real Time & Stored Graphs   mV-volume or pH-volume titration curve, 1st derivative curve or 2nd derivative curve, in pH-mode or mV-mode; pH/mV values versus time-datalogging results
Data Storage   up to 100 complete titration and pH/mV logging complete reports
Disk Drive   built-in 3.5" floppy disk drive allows storage and transfer of configurations, preprogrammed methods, custom methods, titration reports and bitmap graph files
Peripherals   connections for VGA display, PC-keyboard, parallel printer, RS 232 input, interface for future expansion
GLP Conformity   instrumentation data storage and printing capabilities
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   110V/220 Vac; 50-60Hz
Dimensions   390 x 350 x 380 mm (15.3 x 13.8 x 14.9 in)
Weight   approx. 10 kg (22 lbs.) with one pump and stirrer assembly

Manual: (Download)