SentinelPro™ -

Dynamic Image/Particle Shape Analyzer

The SentinelPro is a class-leading dynamic image analyzer that is ideal for applications where particle shape, not just the particle size, may be critical information for predicting raw material quality and to maintain a high level of process control.

Particle morphology provides important information regarding the physical shape properties of your sample. It has been shown that shape can affect flowability, dispersion, packing density, segregation, aggregate formation, and microstructure character.

The fully automated SentinelPro is a well-suited research grade instrument or for use in a full production environment where speed, accuracy, and ease of use with its Pass/Fail shape control limits feature can be utilized.

Principles of Operation

Particles are suspended in a flowing stream, backlit by a high speed, Xeon strobe and then photographed by a high-resolution digital camera at up to 127 frames per second. Individual particle images are viewed directly and captured as a video file for post-run processing.

The dynamic turbulent flow path provides a three-dimensional, random orientation, direct view of the moving particles within the sensing zone. Dynamic imaging provides greater particle detail regarding convexity, sphericity, symmetry and aspect ratio when compared to static imaging.

SentinelPro Unique Design Benefits:

  • High speed, 127 frames per-second rated Digital Camera, with up to 5 Mpix resolution, captures live images of thousands of particles
  • More than 30 shape parameters are recorded, including circularity, ellipticity, opacity, mean diameter, smoothness, aspect ratio, fiber length and many more
  • All analyzed particles have thumbnail images saved for post-run viewing and shape analysis, both in grey scale and binary views.
  • Ability to compare different analyses via histogram overlays for all analyzed shape parameters
  • Scatter plot correlates two shape measurements and can be utilized as a process quality control criterion as an at-line application within unit operations.
  • Unique and powerful software permits the user to simplify data processing to a pass/fail reporting or choose to extend data analysis to a full suite of post processing image and shape analysis reports.
  • Multi-Run sample trending – Statistical Process Control capability and ability to track shape changes over user defined time intervals.
  • Instrument Qualification feature includes NIST standards and detailed Quality Assurance documentation.
  • Particle Concentration Correlation– adjust concentration reporting to correlate to traceable reference concentration standards.

Dynamic Image Analysis

A recirculating liquid system transports the suspended sample through the analysis cell where a CCD camera takes an image of the particles, converts the image to a digital format, and sends the information to the software for final analysis in real time.

Shape Model Descriptions:

Circle Models:

  • Equivalent circular area diameter
  • Equivalent circular perimeter diameter
  • Bounding circle diameter
  • Mean radius diameter
  • Circularity
  • Smoothness
  • Compactness

Rectangle Models:

  • Bounding rectangle length, width
  • Bounding rectangle aspect ratio
  • Rectangularity

Fiber Models:

  • Fiber length, width
  • Fiber aspect ratio
  • Fiber curl

Ellipse Models:

  • Equivalent elliptical area, width, length
  • Bounding ellipse width, length
  • Elliptical aspect ratio
  • Ellipticity

Polygon Models:

  • Polygon order
  • Interior angle
  • Convexity

Irregular Models:

  • Feret length, width
  • Feret aspect ratio
  • Surface uniformity

Pixel Intensity:

  • Opacity
  • White Fractions

Two Models Available:

SentinelPro Stand-Alone Instrument:

This model is a fully independent, stand-alone instrument to process samples for Shape analysis by Dynamic imaging. Unit includes an internal peristaltic pumping system with chemically resistant tubing throughout the fluid path.

Its flexible design enables automatic fluidic cycling, optic conversions for extending the particle size range and permits customization for higher viscosity samples by our Custom Engineering Department to meet your specific needs.

Particle Size Range:


SentinelPro Shape Module:

Fully integrates Into Your Current Particle Sizing Workflow Without Compromise

The SentlinelPro Shape Module automatically takes an aliquot of sample from the reservoir of your current laser light scattering instrument.

No need to change or re-validate your currently established method or process, instead easily integrate the Shape Module within the fluid path of your existing size-only instrumentation.

As the sample is being analyzed, the  SentinelPro taps into the sample reservoir of your sizing instrument, removes an aliquot of no more than 30ml of the sample, performs real-time shape analysis and returns the sample to the existing instrument without jeopardizing sample or the  integrity of your particle sizing instrument.

Particle Size Range

1-300 um
10-800 um
100-2500 um

SentinelPro Features:

Thumbnail Extraction from Specific Points in Histogram:

The SentinelPro employs two important features: random orientation and recirculation of the sample. These two features help to ensure a true representation of the sample, as well as accurate data.

When viewing particle thumbnails, the left-mouse button will display all the shape measurement values for that selected thumbnail.

The right-mouse button will allow the user to eliminate that specific particle from the database and statistics.

Useful when, for example, a single air bubble is not wanted in the database.

Particle Concentration Correlation

  • Adjust concentration reporting to correlate to reference concentration standards.
  • More accurate, improved concentration results.
  • References to traceable and recognized count standards

SentinelPro Instrument Features:

  • High speed, high resolution optics
  • Real-time results
  • More than 30 size and shape measures
  • Particle thumbnails in gray scale and binary imagery
  • Multi-run overlaying of shape data
  • Sieve correlation capability
  • Upgradeable optics
  • Organic fluid capability
  • Security and regulatory compliance
  • Flexible, fluidic design
  • Four size range model options
  • Real-time data backup for remote viewing
  • Automated recirculating, sample handling module
  • 3-Dimensional analysis with random orientation
  • Simple, reliable hardware for low maintenance
  • Unique integration with smartphone app allows for remote data analysis of all results and thumbnails in real-time
  • Particle classification feature allows users to automatically have a full analysis for each subcomponent in a mixed sample

SentinelPro Software Features:

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    Thumbnail Extraction from Specific Points in Histogram

    The Particle Insight allows the user to have a true analysis of all dimensions of the particles. In addition, the user is able to selectively see each particle that created a certain area of any shape histogram.

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    Scatter Plot Correlates Two Shape Measures

    The correlation between any two shape results of the same sample can give the user unique information about their process and their particles. The correlation coefficient calculation can also be used as quality control criteria for process control. This Pearson coefficient is widely used as a measure of the strength of linear dependence between two variables.

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    Process Monitoring

    To simplify manufacturing process control, the Particle Insight incorporates a process monitoring feature that shows simple pass/ fail indicators for any shape measurement. It is no longer necessary to control an incoming or outgoing process by particle size alone. This feature can also be used to classify particles as required by industry standards such as ISO 4406 and NAS 1638 for the oil industry, and USP <788> for therapeutics.

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    Smartphone and Tablet Application for Particle Insight

    View and perform additional statistical analysis on the go. A unique feature allowing automatic real-time secure cloud based data transfer from the Particle Insight to the palm of your hand. As results are completed, data is uploaded where authorized users can download and not just view results but also perform statistical analysis.

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    Compare Samples with Shape Overlays

    The Particle Insight allows for sample-to-sample comparisons that can visually show the differences in shape aspects of particles. By overlaying sample histograms for all the available shape parameters, the user can compare different samples and make determinations based not only on size, but on shape as well.

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    Data Generated in Either Graphical or Spreadsheet Formats

    Statistical information can be shown and printed for all shape measures including sieve-correlations and the automatic creation of spreadsheet files enabling users to have shape information for each particle analyzed.