There are numerous techniques by which to determine the quantity vs. equivalent size distribution of a collection of particles. Selecting the right technique is critical in obtaining reliable data. No single technique is appropriate for all materials or applications. For this reason, Micromeritics offers you six different particle size analyzer choices, each employing different analytical techniques, to fit your application.
Dynamic Light Scattering and Zeta Potential
With the next evolution of the precise science that brought you NanoPlus, the NanoPlus HD brings high definition accuracy with powerful 70mW lasers, expanded analyses flexibility with a broad range of temperature controls and increased efficiency.
- Measures particle size in a range of 0.1 nm to 12,300 nm
- Enhanced zeta potential accuracy through full cell, multi-point correction scans.
- Eliminates electro osmosis error influence
- Higher sensitivity for increased raw data quality for improved accuracy in results
- Increased flexibility with protein and biological samples through a broad range of temperature controls to maintain sample integrity
This technique uses the principle of pressure drop across a packed bed of powder. By varying the sample height, and hence the “porosity” of the bed, average surface area and particle size can be determined as a function of pressure rop and flow rate in accordance with the Carman-Kozeny equation.
- Measures particle size in a range of 0.2 – 75 μm
- Designed to generate “Fisher number” results identical to that of its predecessor, the Fisher Sub-Sieve Sizer
- Simple set-up and real time data display
The Electrical Sensing Zone
The electrical sensing zone (ESZ) technique, also known as the Coulter principle, analyzes samples particle by particle. Requiring only a small volume of sample for analysis, it provides the highest particle size measurement resolution of the techniques presented here.
- Sizes and counts both organic and inorganic materials from 0.4 to 266 μm
- Different conductive liquids can be used without needing to enter an extensive set of liquid properties
- Does not require previous knowledge of material properties (density, refractive index)
- Automated features include: start-up, run, and shut-down routines; blockage detection and clearing; flushing/rinsing; and calibration
- A CCD camera provides real-time video display of the aperture to assure a clear path through the detection zone
Sedimentation velocity of suspended particles can be obtained by measuring the concentration of particles remaining in suspension with time. This technique measures the distribution of equilibrium velocities of particles settling through a liquid under the influence of gravity.
- Particle size range of 0.1 to 300 μm
- Complete particle accountability
- Features lifetime warranty (7 years) on the x-ray tube
- Optional MasterTech 052 autosampler provides unattended analysis of up to 18 samples
Dynamic Image Analysis
Particles are suspended homogeneously in a carrier liquid. They pass through a thin flow cell in the optical path. Light is transmitted through the flow cell, thus projecting silhouettes of the particles onto a high-resolution camera sensor.
- Three size range model options – 1 to 150 μm, 3 to 300 μm, and 10 to 800 μm
- Real time data display with a unique optics camera with high frame rate and resolution for enabling analysis of tens of thousands of particles in seconds
- Select from 30 size/shape parameters for the best match to the particles being analyzed
- Thumbnail images of all analyzed particles for post run viewing and shape filtering with customizable particle type views
- Recirculating sample module and optics enable statistically valid measurements in a very short amount of time
- Standard system is compatible with both aqueous as well as organic fluids
Static Light Scattering
The size of particles can be determined from the manner in which they scatter light. The most common application of this technique is low angle light scattering (LALS) in which an assemblage of particles is illuminated by a source of monochromatic, coherent light.
- CCD technology with high angular resolution of up to 70 degrees provides accurate results within the range of 40 nanometers to 2.5 millimeters
- Fast, detailed results that are repeatable on and reproducible between every Saturn Digi-Sizer
- Liquid sample handling unit for automatic sampling, diluting, and dispersion. Available in both standard and low volume configurations