The Zeta Potential Analyzer ZPA 20 uses the patented bidirectional oscillating streaming potential analysis to measure the zeta potential of fibres, powders and plate shaped solid materials. Applications that depend on the adhesion between solids, the adsorption and chemical reaction of ions/molecules, surfactants, polymers etc. can all benefit from investigating the zeta potential and its changes depending on the pH value.

The Zeta Potential Analyzer ZPA 20 is a compact measuring instruments that utilises the patented bidirectional oscillating streaming potential method. It is designed to measure the zeta potential of various macroscopic solid samples with highest accuracy and within shortest time.

The ZPA 20 uses removable measuring cells for various types of materials. Hence, plate shaped samples as well as fibres and powders can be easily prepared and placed into the system. A consistent packing density of powders and fibres can be ensured using a torque wrench. The ZPA 20 features high precision measuring probes for voltage, current, conductivity, pH value, pressure and temperature.

With its powerful stepping motor the ZPA 20 can create an oscillating flow of the electrolyte with frequencies of up to 0.5 Hz and hence, the zeta potential can be measured in under a minute with a high statistical quality and across a multitude of applied pressures.

Concentration dependent measurements can be done using the optional liquid dosing unit LDU 25. For example, the isoelectric point can be determined automatically by adding basic or acidic solutions to the electrolyte and hence, changing the pH value.

Main features

• patented bidirectional oscillating streaming potential method
• powerful stepping motor for oscillation frequencies of up to 0.5 Hz
• measuring probes for voltage, current, conductivity, pH value, pressure and temperature
• measuring duration for a single zeta potential typically under 1 minute
• optional liquid dosing unit LDU 25 for automated pH value changes
• measuring cells for fibres, powders & granulate materials or for plate shaped solid materials

Software

The ZPA 20 is controlled via the ZPASoftware. Learn more about the Software for the ZPA 20.

Accessories

The ZPA 20 can be used with different measuring cells for various materials. With the liquid dosing unit LDU 25 concentrations in the electrolyte can be changed automatically like e.g. the pH value. Learn more about the available accessories.