• Description
  • Specification
  • Consumables


WALLISζTM is an innovative high resolution Zeta potential analyzer purely dedicated to nanoparticle and colloidal charge characterization.

  • Based on a modern version of Laser Doppler Electrophoresis (LDE) technique
  • Ideal tool for studying colloidal suspension’s stability and nanoparticles’ electrophoretic properties

Key benefits

  • No electro-osmosis → Artifact-free measurements
  • Improved LDE technology → Efficient, reliable & simple
  • High-resolution measurement → Accurate & repeatable Zeta potential analysis
  • High durability electrodes → robustness & cost-effectiveness
  • Designed for standard disposable and quartz cuvette → Easy-to-fill, compatible with organic solvents and high-pH suspensions
  • Advanced software functionalities (Time, pH, Temperature kinetic modes, SOPs, reporteditor, etc.)
  • Easy-to-use and intuitive Graphical User Interface (GUI) software

Technologies & innovations

Dip cell : simple, robust, artifact-free

  • Simple and easy sample preparation ; no risk of bubble
  • Robust : high durability vitreous carbon electrodes
  • Artifact-free : optimized dip cell electrodes design → no electro-osmosis bias

High resolution measurements : sampling frequency 30 times higher than competitors / significantly improving measurement resolution down to 0,1 mV


  • Zeta potential measurement range: -200mV to +200 mV
  • High resolution measurement: better than 0.1 mV
  • Dip cell with unique high durability amorphous carbon electrodes
  • ZetaQ proprietary software (lien vers onglet ZetaQ)
  • Compliant with ISO 13099-2 Colloidal system – methods for Zeta potential determination – Part 2