The ZetaReader® is a compact and easy-to-use, rapid zeta potential (ZP) analyzer that uses a sophisticated electrophoresis cell and high-resolution digital camera for real-time measurements.

Unlike most other ZP analyzers, the ZetaReader can make the measurement on a remarkably wide range of particle sizes, from 20nm to over 500microns. It is also available with a one- or three-channel titrator for studying changes in ZP as a function of pH or salt concentration for example. Samples are introduced directly from sample jars and bottles without the need for manual filling of cuvettes. The direct imaging technique used allows zeta potentials of both individual particles and flocs to be measured in the same suspension, plus optional image analysis. The measurements are effected without beam splitters, light intensity attenuators or compensation optics.

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SPECIFICATIONS
Particle size range for ZP measurement: 20nm - 500µm
Zeta potential range: -200mV to +200mV
Temperature range: 2 - 60 ºC
Illumination: LED, bright field and dark field
pH measurement range: 2 - 14
Specific conductance range: 10 - 25000 µSiemens.cm^-1
Cell material: PEEK

Zeta potential is a measure of electrical charge associated with the surface of a particle in a fluid. It has practical significance for those working with suspensions of powders in aqueous or non-aqueous media. The relative instability of a suspension, i.e. the tendency of the solid particles to flocculate (aggregate) - or not - is a function of zeta potential (ZP). The behavior of particles coming together (when ZP is low, typically -30mV to +30mV) is considered to be desirable in the field of water treatment where much of the suspended matter might be otherwise too small to filter out. Conversely, an oral pharmaceutical preparation should maintain its dispersed colloidal state, that is it should exhibit a high zeta potential, to ensure proper dosing of the active compound.

Zeta potential is an important material property in many other areas of science and technology including, but not limited to, fine ceramics, geology and mining, food and beverages, biosciences, chemicals and polymers, cosmetics, inks and paper pulp.

zetaReader Brochure
zetaReader(Spanish) Brochure