optical granulometro for measuring the concentration of particulate matter in a fluid in the regime of low concentration

摘要

the granulometro uses a laser beam to measure (9) to illuminate the particles.through the measure of distribution of the scattered light from the particulates in examination and collected by a lens (11), collectionmeasure the concentration of particulates in the fluid in the regime of low concentration.the laser beam (9) having convergent focused on a shell opaque to laser beam (12) and cover partly the lens itself (fig. 3).