Turbotrac: How it works
A compressed air stream is used both as a carrier and a dispersing agent for the dry powder. The air stream is connected to the eductor block. The Turbotrac eductor nozzle incorporates a series of TURBOJETS set at multiple angles to the sample flow. This arrangement creates a number of mini-vortices within the sample flow which disperse the material. The eductor gap can be adjusted by raising or lowering the eductor nozzle resulting in increased or decreased sample dispersion. Air pressure settings and eductor gap settings are determined on the basis of the degree of dispersion required and the friability of the material being measured. The measured material is then collected by a vacuum system.
This combination provides unparalleled dispersion of dry powders for use in the pharmaceutical, biotech, food and beverage, ceramics, cement, metal powders and oxides,abrasives and general materials processing industries.
Turbotrac: Wet-Dry Data Comparison
The Turbotrac eductor system provides superb dispersion of dry powders through its unique Turbojet feature. Four different Aluminium Oxide samples were run in the Microtrac S3500 Particle Size Analyser. The samples were run wet in the Sample Dispersion Controller (SDC) and dry in the Turbotrac Dry Powder Dispersion System. The samples had mean volume particle sizes of 5, 10, 18 and 65 microns respectively. As shown in the graphic, the dry Turbotrac data shows excellent agreement with the corresponding wet analyses.

mie theory and fraunhofer apptoximation
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