Micromeritics Instrument Corp., Norcross, GA – a global leader in material characterisation technology – has launched the highly automated Sub-Sieve Autosizer II (SAS II), an instrument that boosts the productivity and accuracy of particle sizing via the air permeability technique, a benchmark in many industries. A direct and substantially improved successor to the renowned Fisher Model 95 SubSieve Sizer (FSSS), it generates ‘Fisher numbers’ which are highly consistent to those of its predecessor. With easy-to-use functionality and electronic data recording, the new SAS II is particularly useful for those complying with specific ASTM standards including E2980, E2651, B330-12 and B330-15 for metal powders and C721-15 for alumina and silica powders (ceramics).

The SAS II delivers particle size measurements in the range 0.2 to 75µm, a range that tends to be too fine for economic and/or accurate sizing by sieve analysis. It utilises the non-destructive air permeability technique which was commercialised many decades ago specifically to meet the requirement to size finer powders. The resulting ‘Fisher numbers’ are a critical part of established or historical specifications for a significant number of products. The technique involves measuring the pressure drop across a packed bed of sample at a defined air flow rate.

Integrated software makes the SAS II quick and easy to set-up with a real-time data display simplifying method development. Fully automated measurement sequences include computer-controlled sample compaction and pressure stability for high repeatability. Micromeritics’ main European office is in Unterschleissheim, Germany. www.micromeritics.com
 

Sub-Sieve Autosizer II from Micromeritics
 

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