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  • Measure, analyse, control


    Measure, analyse, control

    The systems we supply are used at all stages in research, development and manufacturing

    Our systems enable you to measure, analyse and control a broad range of properties and characteristics across a wide range of sample types.

Beckman Coulter - DelsaMax Pro - Zeta Potential

DelsaMax Pro

Allows simultaneous analysis of both particle size and zeta potential from sample volumes as small as 45 μL in as little as one second.

Ideal for proteins, carbon nanotubes suspensions and emulsions, the speed of analysis means delicate samples such as proteins are not perturbed by the analysis resulting in more reliable and reproducible data. Utilises Dynamic Light Scattering (DLS, sometimes referred to as Quasi-elastic Light Scattering QELS) to determine molecular size simultaneously with Phase Analysis Light Scatter (PALS) to determine Zeta Potential.

Using 32 detectors for zeta potential measurement and a separate detector for sizing the DelsaMax is able to measure zeta potential on samples as low in concentration as the equivalent of 1mg/ml Lysozyme. The incredible speed of the analyzer comes in part from its 32-detector array, which allows sensitive detection of particle motion in response to the applied electric field. Rapid detection helps prevent sample degradation that can occur in other slower Zeta potential instruments due to the prolonged exposure of the sample to intense electric fields.

The Assist accessory provides pressurisation of the measurement cell to eliminate gas bubble formation which further improves reliability and reproducibility on samples prone to gassing.

The analyser also utilises a flow cell system requiring only 170 μL of sample, and can be used in-line with industry standard auto-samplers for analysis of multiple formulation samples. For challenging samples with high electrical conductivity that are prone to generating bubbles, the analyzer can be used in conjunction with the DelsaMax ASSIST module.


The DelsaMax PRO can be used for many different applications.
Using the DelsaMax PRO – Carbon Nanotube Application Note
Beckman Coulter Instruments – Liposome Characterisation Application Note


We have a number of videos of the DelsaMax PRO here