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Microtrac CAMSIZER 3D Particle Size and Shape Analyzer

The CAMSIZER 3D particle analyzer combines all the advantages of dynamic image analysis (ISO 13322-2) in a completely redesigned measuring system.

Download Microtrac CAMSIZER 3D Particle Size and Shape Analyzer brochure
Download Microtrac CAMSIZER 3D Application Note brochure
Download Dynamic Image Analysis with Microtrac CAMSIZER 3D brochure



Country of origin


Scope and purpose

rapid and exact particle size and shape analysis of all dry, flowable bulk materials and powders

Measurement ranges

recommended range 20 μm to 30 mm (with no hardware adjustment)

Measurement principle

2D and 3D Dynamic Image Analysis according to ISO 13322-2

Measurement time

approx. 2 to 5 min (depends on required measurement statistics)


Dual Camera Technology, 9 MP + 5 MP; up to 250 images per second

Sample material

abrasives, catalysts, chemicals, coffee beans & freeze-dried coffee, construction materials, coal / coke, fertilizer, food granulate, glass / ceramics, silicon granulate, pesticides, pharmaceutical pel- lets, plastic pellets and granules, proppants, refractory products, salt / sugar, sand, washing powder, wood chips and many more

Sample feed

14 samples can be placed on the conveyor belt simultaneously (opt. up to 40 samples), for unattended operation, continuous operation is possible, sample feed by electro-pneumatic robot arm, emergency stop-button




CE certified

Compressed air supply

6 to 8 bar

Compressed air consumption

max. 10 l/min

Dimensions (H x W x D)

33.46×25.59×13.77in / 850×650×350mm


approx. 88lbs / 40kg



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. 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. 




Microtrac’s unique dual camera technology is a landmark in the development of Dynamic Image Analysis (DIA). By simultaneously employing two cameras with different magnifications, extremely wide dynamic measuring ranges are archieved. This is accomplished without hardware adjustments or modifications and without compromising accuracy. Each camera is specialized for one measuring range.

The ZOOM camera analyzes fine particles with highest precision whereas the BASIC camera detects the larger particles with excellent statistics. A special algorithm combines the information provided by both cameras and delivers the exact size distribution in a possible range of more than three decades!

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 due to the small field of view.


  • 9 megapixel ZOOM camera
  • 5 megapixel BASIC camera
  • Calibration within a few seconds with certified reference objects
  • Wide measuring range without hardware adjustment
  • Non-contact and non-destructive measurement
  • Dust protected housing
  • Rugged construction for use in production environments
  • Automatic dust extraction in the measurement chamber to protect the user and the instrument



Compared to previous CAMSIZER models the CAMSIZER 3D features a significantly higher camera resolution and frame rate by employing a ZOOM camera with 9 megapixels and a BASIC camera with 5 megapixels at a frame rate of up to 250 fps. This allows superior image quality and particle detection, for all coarse and fine samples. Broad and narrow distributions are measured with the same accuracy and precision. The image width of the ZOOM camera is the same as that of the BASIC camera, which ensures excellent reproducibility of the measurement results within a short measurement time.



Traditional sieve analysis frequently forms the basis for quality standards and product specifications between suppliers and customers. A rapid and efficient alternative like Microtrac’s CAMSIZER systems must take this into account and be able to produce results that are fully comparable. This is why the CAMSIZER software is provided with algorithms for emulating sieving processes. In this way many users have been able to replace time-consuming sieve analysis by using the CAMSIZER without having to sacrifice the familiar quality specifications. The automated and wear-free measurement means that the results obtained are more reliable and reproducible over time.

3d beATS 2d



In contrast, traditional 2D analysis captures only one image per particle in random orientation, even if the particle in measured multiple times at increased acquisition rate, there is no “mapping” of one image to another. Each individual image is treated as a new, independent measurement event. The true length, width, thickness, and shape is obscured by this. Rather, the “length” measured in 2D mode is a mixture between true 3D length and true 3D width; the “width” measured in 2D mode is a mixture between true 3D width and true 3D thickness. Only if the particles can be mechanically aligned, meaningful results are obtained in 2D mode. In the past, however, this was only feasible for some special particle shapes like cylinders.


Measurement in 2D Mode


  • Particle size & shape measurement in random orientation
  • Suitable for irregularly shaped material, natural products
  • Results compatible with sieve analysis

Measurement in 3D Mode


  • Separate distribution of length, width, and thickness
  • Excellent detection of defective particles
  • More accurate volume calculation




Microtrac offers various sets of feed hoppers and chutes for specific applications. With the help of the feed guides, the sample stream can be oriented in a way that, for example, longish particles like extrudates are always measured in the correct orientation.







A certified reference object is available for the CAMSIZER 3D, which allows the user to calibrate the device in a few seconds. This object is a glass pane that is inserted precisely into the measuring zone. Circles of various sizes are lithographically applied to the calibration reticle. The reproduction scale of the cameras is determined by measuring the circles. After completion of the calibration process, a protocol can be printed to document the proper condition of the CAMSIZER 3D.




Different chutes and funnel sets are available for the CAMSIZER 3D, which are suitable for different sample volumes and particle size ranges. In 3D mode, the width of the feeder has an influence on the number of particle images in the 3D tracks, as narrower chutes enable a higher acquisition rate due to the reduced image size. However, the use of narrow chute increases the measurement time. MICROTRAC will be happy to advise you on the selection of the most suitable configuration for your application.




Guidance sheets are devices that channel the sample flow before it enters the measurement zone. This can be advantageous, for example, if particlesjump חס the chute due to their mechanical properties. The long shield prevents the particles from being thrown over the measuring shaft and guides them into the focal zone. Guidance sheets also provide protection from air currents that could cause unwanted turbulence in the measurement zone.



The Audit Trail Manager is a software extension that enables operation in accordance with the specifications of the 21 CFR part 11 This standard is particularly relevant in the pharmaceutical industry and its suppliers. The program option offers extensive user administration with various access levels and logs all processes in an encrypted database, the Audit Trail. Measurement results can be electronically signed for quality assurance.



Any measurement is only as good as the sampling and sample preparation that preceded it. Particularly in the case of flowable bulk solids with a broad distribution, segregation will occur and lead to a wrong distribution of particle sizes in the sample aliquot. By using a sample divider, representative subsamples can be easily generated, guaranteeing a representative and meaningful result. MICROTRAC strongly recommends riffle splitters and rotary sample dividers from Retsch, also part of the Verder Scientific Croup.




The Autosampler is a fully automatic sample feeding system for the CAMSIZER 3D which can be easily retrofitted to existing instruments. It processes up to 14 samples (extendable to 40 samples or more) in a row without the need for the operator’s intervention. The correct measurement settings can be read from the barcodes on the sample beaker. The Autosampler is suitable for continuous operation and allows effortlessly measuring more than 150 samples per day, even by untrained operators.



Many properties of bulk materials, like flowability, solubility, filtration efficiency, reactivity, abrasiveness, and taste, are significantly influenced by particle size. Therefore, particle size determination is commonly used as a part of quality control in many different industries. Especially when products with specific geometry are produced, such as extrudates, abrasives, pharmaceutical pellets or fertilizer granules, shape analysis with the CAMSIZER 3D provides important measurement data determining the quality of the sample within a few minutes. Another advantage is that the method can be largely automated via automatic sample feeding systems or online connection.




  • abrasives
  • activated carbon
  • building materials
  • catalysts
  • chemicals
  • coal / coke
  • sand / gravel







glass / glass beads

pharmaceutical pellets






  • refractory products
  • salt
  • sugar
  • supporting agents 
  • (proppants)
  • wood chips