HI 84431
Total Titratable Alkalinity Measurement

The HI 84431 is an automatic titrator designed for easy, fast and accurate analysis of Total Titratable Alkalinity in water. Potentiometric endpoint determination, peristaltic titrant delivery and integrated magnetic stirring systems eliminate the error and technique dependent results associated with manual titrations.

The accuracy of the instrument is ensured by performing a peristaltic pump calibration using the provided HANNA standard. The HI 84431 endpoint determination algorithm analyzes the pH vs. volume curve to determine the exact pH endpoint and performs the necessary calculations. The results are displayed in mg/L CaCO3 or meq/L CaCO3 units on the graphic display.

An intuitive interface makes the instrument simple to use. A dedicated HELP key guides the user through set-up and calibration sequences, reports instrument status and aids in troubleshooting.

HI 84431 features include: log on demand for up to 100 samples (50 pH measurements, 50 titration results), GLP compliance and PC interface via USB.

2 instruments in 1

The HI 84431 is a single parameter titrator designed
to measure total acidity in a few easy steps.
The HI 84431 displays the results directly on the screen
in user selectable units.

The HI 84431 also features a pH meter and
displays the electrode condition on the LCD.


  • User-friendly interface
  • Dedicated HELP key
  • Simple to operate
  • Log-on-demand up to 100 samples
    (50 for pH measurements; 50 for titration results)
  • GLP feature, to view last calibration
    data for pH electrode and pump
  • PC interface via USB connection

Peristaltic Pump
The HI 84431 features a precision, peristaltic based titrant delivery system. Titrant only makes direct contact with the titrant tubing and not the pump interior virtually eliminating titrant contamination and ensuring a long pump operating life.