Zetasizer Ultra and Pro Accessories:

SV-10 Viscometer

Accurate viscosity measurements are vital for accurate size and zeta potential determination.

For size measurement the speed of Brownian motion is directly related to viscosity, so as this speed is used in DLS to determine the size, an error of 1% in the viscosity will lead to an error of 1% in the size reported.

For zeta potential measurement the viscosity of the dispersant is proportional to the viscosity, hence again a 1% error in the viscosity will lead to a 1% error in the reported viscosity. Since many additives such as surfactants, polymers and alcohols will significantly affect the sample viscosity, estimates of the viscosity can be inaccurate.

The SV-10 is a stand-alone accessory that is particularly useful for complex dispersants where there are no standard literature values for the viscosity available.

As measurements of size and zeta potential usually involve dilution of the sample, it is usually only necessary to measure the viscosity of the dispersant. This is particularly useful for dilute proteins as the buffers are usually available in large quantities.

The unit includes measurement cells for aqueous samples, glass cells for non-aqueous measurements and a thermostatically controlled cell holder for measurements at a defined temperature. A recirculating water bath is required for this, which is not included.

  • Fast, continuous measurement of the viscosity of fluids from 0.3 to 10,000mPa.s. (cP).
  • Compatible with any Newtonian liquid, aqueous and non-aqueous.

  • 15 seconds for complete measurement.

  • 1% accuracy.

  • Automated 1 point calibration with water.

  • Sample volume 10mL.
  • PC software included for system control and continuous plotting of viscosity.


System compatibility: Stand-alone measurement.
Sample compatibility: Any Newtonian liquid.
Measurement range: 0.3 – 10,000mP.s (cP).

Disposable Folded Capillary Zeta Cell (Box of 10)

Eliminate sample cross contamination between zeta potential measurements using a completely disposable cell.

The zeta potential of colloids and molecules is extremely sensitive to contamination from components of a previous sample used in a measurement cell. The use of a disposable cell completely eliminates this potential contamination issue.

The folded capillary cell provides the benefits of the accuracy of measurement of a capillary cell with the ease of use of a disposable cell.

Although, disposable, including the electrodes, for low conductivity samples each cell can be used for hundreds of measurements if required.

The cell can be used with the autotitrator, where multiple measurements are routinely done over a wide pH range.

Disposable cuvettes primarily for the measurement of zeta potential
with the Zetasizer Nano series, but can be used for size measurement.

Pack of 10 cells with 20 stoppers.
Requires Zetasizer software version 7.02 or later.

Universal ‘Dip’ Cell Kit

Reusable solvent resistant cell.

Universal dip cell kit for samples in aqueous and non-aqueous, i.e. non-polar dispersants such as hydrocarbons. It is recommended that a separate cell is purchased for aqueous and non-aqueous applications to simplify cleaning. Compatible with PCS1115 cuvettes. Includes electrode assembly with Palladium electrodes with 2mm spacing, one PCS1115 cuvette and cap. Compatible with all Nano series systems that measure zeta potential

High Concentration Zeta Potential Cell

Save time and effort by measuring zeta potential with little or no dilution.

High Concentration Zeta Potential cell kits for the measurement of high concentration samples e.g. ceramics, cosmetics or emulsions.

Includes high concentration cell with palladium electrodes along with:

  • Length of 1/32″ ID silicon tubing
  • Two glass cell cleaning sticks
  • One tube cleaner
  • 4 luer lok fittings
  • 4 stops

The kit is designed to measure zeta potential on high concentration samples combined with low volume capability.

Compatible with all Nano series systems that measure zeta potential. Upgrade to version 6.20 or later is required to use this cell. Software on CD included

  • For size and molecular weight measurements.
  • Compatible with aqueous and non-aqueous solvents and dispersants.

12mm Glass cell (PCS1115)

Glass cuvette for use with the dip cell.
  • For size and zeta potential measurements using the ‘dip’ cell.
  • Compatible with aqueous and non-aqueous solvents and dispersants.

12mm square glass cell (PCS8501)

Glass cuvette for batch measurements
  • For size and molecular weight measurements.
  • Compatible with aqueous and non-aqueous solvents and dispersants.

Low-volume quartz batch cuvette (ZEN2112)

Low-volume quartz batch cuvette for size and molecular weight measurements.
  • Compatible with size and molecular weight measurements with aqueous and non-aqueous solvents and dispersants.

  • Minimum sample volume 12 microliters.
  • Maximum volume 45 microliters.

12mm Square Polystyrene Cuvettes (DTS0012)

Disposable polystyrene cuvettes.
  • 100 disposable cells complete with 100 stoppers to avoid cross contamination.
  • For size measurements using aqueous dispersants.
  • Compatible with zeta potential measurements using the dip cell.

Disposable Solvent Resistant Micro Cuvette (ZEN0040)

Disposable plastic micro cuvette, for size measurement at 173° (NIBS) optics only.
  • 100 x 40µL cuvettes with 100 caps to avoid cross contamination.
  • Compatible with aqueous samples and a range of other solvents: Acetone, Benzaldehyde, Butanone, Dioxane, DMF, Ethyl acetate, Isopropanol, plus various acids and bases.

Zetasizer Nano Family Accessories:


Automated particle size measurement for the Zetasizer Nano

The Zetasizer NanoSampler is a sample delivery system that ensures highly precise and reproducible automated loading of samples into your Zetasizer Nano. The NanoSampler adds automation and unattended operation in a versatile, compact package, maximising the productivity of your Zetasizer Nano. While the benefits of automated operation are useful for all users, the NanoSampler is ideally suited for laboratories where a large number of measurements are required and reproducibility or multi-variate studies are important.


The Zetasizer NanoSampler can accommodate up to 96 sample vials, accurately delivering up to 3 sequential aliquots of each sample into the Zetasizer Nano for automated particle size or molecular size measurements. All operation remains within the easy-to-use Zetasizer software using the simple Standard Operating Procedure (SOP) interface. The NanoSampler is delivered complete with the software, analysis cell and fittings to attach to the Zetasizer Nano instrument.
  • Automated measurements reduces operator bias and improves laboratory efficiency

  • Unattended multi-variate analysis simplifies exploration of the effect of key formulation parameters

  • Compatible with any Zetasizer Nano for measurement of size

  • Automates reproducibility studies

  • Improved sample throughput

  • Reduced operator time

  • Maximizes the return on your Zetasizer investment
  • Simple change over from automated to manual measurements



The MPT-2 is an accessory for the Zetasizer Nano that provides extensive automation for a number of measurements that are routinely required when characterizing the size and zeta potential of dispersed particles and molecules.

Both the size and zeta potential can be measured in sequence as part of the automated titration.

pH is one of the main influences of the zeta potential of materials, so measuring zeta potential as a function of pH, and the determination of the isoelectric point are often required. Automating this improves productivity by proving a complete measurement using a stored method.

Conductivity is also measured, and automation can speed up the determination of whether ions in a formulation are specifically or non-specifically bound.

The same automation can be extended to study the effect of the concentration of additives such as surfactants and polyelectrolytes, and there is a dilution function to study the effect of dilution on the size and zeta potential of the sample.

  • Complete automation of pH, conductivity and additive titrations.
  • Simplify titrations by running a standard method.
  • Improve productivity through hands off operation.
  • Software integrated with the Zetasizer Nano.
  • Color coding of titrants in software and hardware simplifies operation.
  • Magnetic stirrer to ensure complete mixing.

  • Size and zeta potential measurement at each point (Zetasizer Nano ZSP and ZS only).
  • 3 syringe dispensing units for the titration of acids, bases, salts and other dissolved aqueous additives.
  • Use with a titrant autodegasser unit (DEG0003) is recommended to give evenly spaced pH points.

Surface Zeta Potential Cell

Extend the application of the Zetasizer Nano to measure the zeta potential of material surfaces.

The characterization of surfaces and interfaces is critical in a wide range of industries including consumer products, specialty chemicals, pharmaceuticals and life sciences. In each of these application areas, the interaction of molecules and particles with surfaces can influence the material properties of the end product.

The surface zeta potential accessory enables the measurement of the zeta potential of flat surfaces such as filter paper, silica, polymers and bone, using a standard Zetasizer Nano system.

• Surface zeta potential cell with palladium electrodes
• 12-well plate for sample containment
• 10 PEEK sample holders
• 1 Screwdriver for cell tightening
• 1 pair of forceps for sample handling
• Cell height alignment jig
• Cell holder gluing jig

Compatible with all Nano series systems capable of making zeta potential
Note: Requires software version 6.3 or later

Quartz flow cell (ZEN0023)

Add flow capability for size measurements to the Zetasizer.

Quartz flow cell for size and intensity measurements. Compatible with MPT-2 autotitrator and the Zetasizer Nano S, ZS, S90 and ZS90. Complete with connecting tubing for autotitrator.

  • Measure size and intensity with MPT-2 autotitrator.
  • Connect to an SEC system to use as a DLS detector.