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Microtrac MRB | Image Analysis, Material Characterization, Particle Size Analysis

The CAMSIZER 3D particle analyzer combines all the advantages of dynamic image analysis (ISO 13322-2) in a completely redesigned measuring system, setting new standards in the characterization of bulk solids.

Unique 3D Analysis: Thanks to the extended field of view and long drop distance, each particle is analyzed up to 20 times and in different orientations, making the actual, three-dimensional particle morphology accessible for analysis. The evaluation of the “3D tracks” also provides much more meaningful shape analysis than ever before.

Proven 2-Camera System: The new ZOOM camera inside the CAMSIZER 3D (9 MPx) allows for the evaluation of fine particles with great accuracy. In combination with the BASIC camera (5 Mpx), this enables a wide measuring range from 20 µm to 30 mm. CAMSIZER 3D is the first choice for the analysis of dry, free-flowing bulk solids in both quality control and for research applications.


  • Patented 3D analysis with "Particle Tracking”
  • Up to 30 images of every particle
  • Particle size and shape analysis from 20 µm to 30 mm without hardware adjustment
  • Short measuring time of 2 to 5 minutes
  • High sample throughput
  • 100% detection of oversize particles
  • Excellent compatibility to sieve analysis
  • Excellent reproducibility
  • Evaluation of > 250 images / s in real time (in 3D mode)
  • Powerful, long-life LED light source
  • Maintenance-free


The CAMSIZER 3D utilizes a funnel, vibrating feed chute, LED strobe backlighting, powerful high-speed cameras, and sophisticated software to perform the measurements.

The particles travel down the vibrating feeder and fall into the sensing zone, creating a tumbling motion as they fall. The CAMSIZER software tracks each particle as it passes between light source and cameras, taking up to 250 images per second. As the particle is tracked, multiple images are recorded, measuring length, width, thickness, perimeter, area and various shape descriptors. The software automatically aligns the images for viewing, with up to 30 images per particle. This creates a “particle track”, a sequence of images of the same particle in different orientations. From this, distributions can be calculated, based on one or more size or shape parameters. Filters can be applied to isolate groups of particles of particular interest for more targeted analysis.

In the particle track, the software determines the width and the length of each particle projection:

    • the largest value of all length measurements within a particle track is the “3D length” of the particle
    • the largest value of all width measurements within a particle track is the “3D width” of the particle
    • the smallest value of all width measurements within a particle track is the “3D thickness” of the particle

Thus, for particles with three different dimensions (e. g. almonds), the size distributions of all three dimensions can be output separately.

3D Analysis is particularly advantageous for particles that are supposed to have a specific shape like spheres, rods (extrudates), lenses or ellipsoids (“rugby-ball”-shape). With the 3D tracking technology, each particle inevitably shows a wide variety of projections, which automatically also opens new possibilities in shape analysis.


Microtrac MRB’s unique dual camera technology is a landmark in the development of Dynamic Image Analysis. By simultaneously employing two cameras with different magnifications, extremely wide dynamic measuring ranges are achieved. This is accomplished without hardware adjustments or modifications and without compromising the accuracy.

Each camera is specialized for one size range. The ZOOM camera analyzes fine particles with highest resolution whereas the BASIC camera detects the larger particles with excellent statistics. A special algorithm combines the information provided by both cameras, covering a size range of more than three orders of magnitude.

This arrangement resolves a significant drawback of many image analysis systems that employ only one camera, e. g. microscopes. Such instruments either cannot correctly report the fine particles in wide size distributions, or the large particles are not captured reliably due to the small field of view.

CAMSIZER 3D Brochure

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