What does "particle concentration" displayed in a particle size distribution measurement mean?

The "concentration" displayed in particle size distribution measurements generally refers to the magnitude of the received light signal. This quantity, which is related to the number of particles, is generally called optics concentration, not percentage concentration.

For laser methods, the greater the number of particles in a suspension, the greater the optics concentration (although excessive particles may reduce the optics concentration). For sedimentation methods, the greater the number of particles in a suspension, the lower the optics concentration.

During the test, the particle concentration is displayed at all times. This allows the sample volume to be adjusted to maintain the optimal concentration. The optimal range is defined as the particle concentration range where multiple laser scattering does not occur. Within this range, test results are highly repeatable and accurate. Different materials and particle size distributions dictate different optimal concentrations.