HEL Subsieve AutoSizer

Particulate Systems
The H.E.L. Limited Subsieve AutoSizer (SAS) is a new addition to the established field of air-permeability particle sizing. It has been developed as a direct and improved successor to the widely used Fisher Model 95 Sub-Sieve Sizer (FSSS). The SAS adds automated functions, and electronically recorded and presented data, to an established particle sizing technique. The SAS uses the principle of pressure drop across a packed bed of powder. By varying the sample height, and hence the “porosity” of the bed, average surface area and particle size can be determined as a function of pressure drop in accordance with the Carmen equation. The SAS measures particle size in the range of 0.2 µm to 75 µm and has a compression accuracy of less than 0.05 mm.

Why Air-permeability Particle Sizing? 
Air-permeability techniques generate average Specific Surface Area (SSA) data for a sample of powder. The SSA of particles has a significant impact on the physical properties of powders and has been the focus of much attention from such diverse communities as the pharmaceutical, paint, toner and geologic professions. The SAS has particular applicability to the Pharmaceutical Quality Control field where the quick and reproducible SAS-derived Surface Areas can be used to control batch-to-batch variation in important properties such as bioavail-ability and drug delivery.
Features / Benefits: 

  • Superior Software – Complete Control HEL Software sets a world-wide standard for instrument operation, data acquisition and handling, reporting and systems integration.
  • Quick and Easy Set-up – Simple step by step set-up, easy to follow; ensuring that no parameters are over looked.
  • Easy Mode – A “Start” button runs the complete measurement to pre-selected requirements.
  • Real Time Data Display – Data can be viewed as it is acquired simplifying method development by ensuring that the user is never divorced from the measurement.
  • Report Generation – Company logos, typestyles and formats can be incorporated into printouts.
  • Security Features – Optional Password Protection ties samples to user ID’s and protects plans from unauthorised changes.

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Most manufactured products today are mixtures of several components. Generally, the individual ingredients in a mixture will separate (segregate) during the manufacturing process which results in an inconsistent final product. Segregation, or separation, of granular powder materials is one of the main causes of process failure with systems that handle powder materials.