Particle analysis at the touch of a button
The Litesizer™ 500 is an instrument for characterizing nano- and microparticles in dispersions and solutions. It determines particle size, zeta potential, and molecular mass by measuring dynamic light scattering (DLS), electrophoretic light scattering (ELS), and static light scattering (SLS).
Moreover, the Litesizer™ 500 is the only DLS-based particle analyzer that is able to perform a straightforward measurement of the sample’s refractive index.
A highlight of the Litesizer™ 500 is its ingeniously simple software. We have created a one-page workflow, where input parameters, results and analysis are all on a single page: You can set up your experiments in a few seconds, and produce the analyses and reports you need at the touch of a button.
Continuous transmittance measured automatically
Transmittance gives you instant feedback about your sample, and allows automatic optimization of measurement parameters (angle, focus position, and measurement duration).
Accurate determination of the refractive index
While for most particle analyzers these indices must be determined from external sources, the Litesizer™ 500 is able to measure the refractive index for the exact wavelength and temperature of your experiment. This ensures maximum accuracy of particle size and zeta potential results under all experimental conditions.
The Litesizer™ 500 determines the solvent refractive index within ±0.5 %, as defined by ISO 22412:2017 concerning the accuracy of the refractive index required for DLS.
Particle-size measurements: Unprecedented resolution
Several different particle sizes in a single suspension can be precisely resolved, thanks to highly developed algorithms in the firmware.
cmPALS – new patented technology for zeta potential
With cmPALS (European Patent 2 735 870), measurements can be performed at much lower applied electric fields, and within significantly shorter measuring times, thereby enabling reliable measurements of even highly sensitive samples.
Unique Ω-shaped capillary tube for zeta potential
Measurements are more stable and reproducible because of the unique Ω-shaped capillary in the cuvette.
Ingeniously simple software, Kalliope™
Kalliope™ provides an intuitive one-page workflow, where input parameters, measurements and analyses are all at hand. Kalliope™ is fully compliant with the FDA’s 21 CFR Part 11 regulations.
|Temp. control range||0–90 °C|
|Light source||Laser / 40 mW, 658 nm|
|Laser warm-up time||6 min|
|Ambient operating temp.||10–35 °C|
|Humidity||up to 90 % non-condensing|
|Dimensions (W, D, H)||460 mm, 485 mm, 135 mm|
|Weight||approx. 18 kg (40 lb)|
|Particle size specifications|
|Measuring range||0.3 nm – 10 μm* (particle diameter)|
|min. conc. (protein)||0.1 mg/mL (lysozyme)|
|min. conc. (polymer)||1 µg/mL (polystyrene latex)|
|Accuracy||Better than +/-2 % on certified reference material|
|Repeatability||Better than +/-2 % on certified reference material|
|Minimum sample volume||12 µL|
|Measurement angles||15°, 90°, 175°|
|Zeta potential specifications|
|Measuring range||-600 to +600 mV|
|Mobility||10-11 m²/V.s to 2 x 10-7 m²/V.s|
|Size range||3.8 nm – 100 µm|
|Sensitivity||1 mg/mL (lysozyme)|
|Maximum sample concentration||40 % w/v|
|Sample volume||350 µL|
|Maximum sample conductivity||200 mS/cm|
|Molecular mass specifications|
|Measuring range (mass)||980 Da – 20 MDa|
|Measuring range (particle size)||up to 40 nm (diameter)|
|Sensitivity||0.1 mg/mL (lysozyme)|
|Size range||No limit|
|Measuring time||10 s|
|Minimum sample volume|
|Refractive index specifications|
|Measuring range||1.28 to 1.50|
|Temperature range||0 °C to 90 °C|
|Minimum sample volume||1 mL|
|Wetted parts:||Quartz, glass|
* under laboratory conditions
Gold nanoparticles: Size matters, and so does stability
Gold nanoparticles are now used in many fields, from medicine to electronics, but each application has specific particle-size and stability requirements. Gold nanoparticles can be easily monitored with the Litesizer™ 500.
Identifying three different particle sizes in one sample with DLS
Particle suspensions often contain more than one size of particle. However, many particle analyzers cannot resolve particle mixtures, instead they detect an average of all sizes. The Litesizer™ 500 can detect three sizes in one sample.
Milk: Know the particles, know the quality
The size of the fat particles in milk can vary, which strongly affects milk quality. Characterizing milk-based particles is fast and accurate with the Litesizer™ 500.
Nanoparticles for Ceramics: Size, Stability & pH
In nanoparticle suspensions that will be used in ceramics, particle size and stability are of vital importance. Suspension stability is essential to ensure that the particles to stay in suspension, and maintain constant particle size.