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This study presents a novel static light scattering (SLS) method for precise particle diameter measurement in industrial applications. The low-cost, fast-response sensor is ideal for real-time monitoring in microchannels.

Keywords:
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Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Chemical Engineering

Background:

  • Industrial particle sensing requires simple, low-cost, robust, and fast-response solutions.
  • Existing methods often fall short in meeting these demands for in-line applications.

Purpose of the Study:

  • To develop a static light scattering (SLS) sensor for in-line particle diameter determination in microchannels.
  • To enable real-time monitoring of particle characteristics in continuous flow systems.

Main Methods:

  • Utilized low-power laser ( < 5 µW) and fast detectors (1 ms response time) for static light scattering measurements.
  • Employed angular light scattering in the range of 20°–160° (2° increments).
  • Developed a novel algorithm based on maxima, minima, and slope distribution for particle diameter characterization, independent of concentration fluctuations.

Main Results:

  • Demonstrated feasibility of particle diameter determination in the 300–1000 nm range.
  • Validated measurements against Mie light scattering simulations.
  • Proposed a design for a low-cost industrial instrument.

Conclusions:

  • The developed SLS method offers a simple, fast, and robust solution for industrial particle sensing.
  • The novel algorithm ensures reliable particle diameter classification even with varying concentrations.
  • This technology has potential applications in paints, colors, pigments, and crystallite production, enabling study of precipitation and crystallization processes.