BI-ZTU Autotitrator

  • BI-ZTU Autotitrator

The BI-ZTU Autotitrator option for the NanoBrook zeta potential analyzers is ideal for automatic determination of the isoelectric point (IEP) of colloidal materials. Four pumps provide unparalleled flexibility for optimizing reagent use. The dramatic savings of reduced labor costs allow for larger scale studies that produce more valuable results.

In addition, the BI-ZTU can be used to evaluate the effect of salt concentration on zeta potential. Also, the surfactant costs can be minimized. Use the BI-ZTU to find the minimum concentration at which the zeta potential does not significantly change.


Features at a glance
  • Titrations with acids, bases, salts, and surfactants
  • 4 metering pumps for ultimate versatility
  • Disposable sample cups


Easy Operation

The BI-ZTU Autotitrator is simple to set up and to use:

  • Attach the power supply to the rear of the BI-ZTU
  • Connect the BI-ZTU to the zeta instrument using the standard USB cable
  • Fill the four 100 mL standard reagent bottles
  • Insert the tubes
  • Replace the plug-in electrode assembly with the flow cell
  • Ready to go!


Integrated & Simple

When the BI-ZTU option is added to a NanoBrook zeta potential instrument, the titrator command appears in the main menu bar. The software automatically guides the user through an autotitration experiment. User friendly dialog boxes guide even the inexperienced operator through each step.

Example of pH titration measurement results

Data was collected and analyzed automatically, saving labor and time.


picture of titration results

Typical Applications

Typical Applications Include:

  • Determine isoelectric point with acid/base or reagent titration
  • Optimize surfactant concentration
  • Measure effect of salt concentration (ionic strength) on zeta potential



RangepH 2 to pH 12.
CellFlow cell included. Fits into instrument square cell holder. For use with NanoBrook: 90Plus Zeta, 90Plus PALS, ZetaPlus, ZetaPALS, and the Omni.
Tubing1.00 mm (0.040″) I.D. Teflon tubing.
External FittingsLuer Lock
IncludespH probe and 4, 100 mL, screw-cap bottles.
Sizesmall footprint, HWD 310 x 180 x 290 mm wide
Power110/115/220/240 VAC, 60/60 Hz, 25 Watts
CertificationsCE Marked

To retrofit to older units, contact the factory.

A policy of continual improvement may lead to specification changes.

Options & Accessories


BI-ZTUpH pH probe for BI-ZTU Autotitrator
BI-ZTU-BPlastic sample cups used with BI-ZTU titration system
BI-ZELFPlastic electrode assembly for use with BI-ZTU plastic cell: Includes BI-ZELF-B
BI-ZELF-BPlastic flow cell for use with BI-ZELF
BI-ZPSParticle sizing cell for use with BI-ZTU autotitrator

Download Brochure

Available Downloads

BI-ZTU Brochure PDF