Q: Measurement Physics Used By Particle Size Analyzers. A: Laser Light Scattering (Horiba) Acoustic Scattering (MHz Range) Electrical Resistance (Coulter) X-Ray Diffraction (Line Broadening) Sedimentation or Settling, including Centrifuge Sieve Sizing (Ultrasonic= 5 micron & larger) Time of Flight Measurements (Amherst)