The Micromeritics Sub-Sieve AutoSizer (SAS) II determines particle size, surface area, and powder bed porosity by air permeability.
Developed as a direct and modernized successor to the widely used Fisher Model 95 Subsieve Sizer (FSSS), the Micromeritics SAS II utilizes a built-in computer and touchscreen to perform measurements easily and quickly in a laboratory setting or on a production floor. Data can be saved, printed, or exported electronically in spreadsheet or PDF formats.
The Micromeritics Sub-Sieve AutoSizer II generates “Fisher number” results highly consistent with that of its predecessor (the Fisher FSSS), using the built-in Fisher Mapping feature. This is a crucial point, as the air permeability technique and the FSSS have been used as a benchmark for decades in many industries. Many applications use historical data and quality control standards, and a modern source of comparable, repeatable results is necessary.
Simple step-by-step, easy to follow, ensuring that no parameters are overlooked
Sample compaction and pressure stability are computer controlled for high repeatability
Optional Password Protection ties samples to user IDs and protects configuration parameters from unauthorized changes
Optimizes data agreement with customizable Fisher correlation
Automatically creates PDF reports with custom company logos and typestyles
The SAS Software sets a world-wide standard for instrument operation, data acquisition and handling, reporting and systems integration
Powerful, intuitive touch pad user interface increases productivity and enables easy creation and retrieval of SOPs
Fully compliant with ASTM standard B330-12. B330-15 – Metal Powders; C721-15 – Al2O3, SiO2 – Ceramics & E2980 – 15 – General particle size
The air-permeability technique is well established for measurement of the Specific Surface Area (SSA) of a sample powder. The SSA measured by this technique has been found to be a useful parameter in various industries such as pharmaceutical, metal coatings, paints, and even geological samples.
The MIC SAS II utilizes dual pressure transducers to measure pressure drop across a packed bed of powder. By varying the sample height and porosity while controlling the flow rate of air through the sample, the SSA and average particle size can be determined using the Kozney-Carmen equation
Comparison trials between the MIC SAS II and Fisher FSSS have been carried out using a variety of samples. The graphs above compare the mean particle size data from the two instruments on powders of different sizes. One plot is based on results for inorganic (mainly tungsten) metal; the second on organic samples (mostly pharmaceuticals). There is exceptional correlation between the two sets of data. Numerous extensive studies have come to the same conclusion.
| Height | 50 cm (19.5 in) |
| Width | 44 cm (17 in) |
| Depth | 27 cm (10.5 in) |
| Weight | 16 kg (35 lb) |
| Voltage | 100-240 VAC ±10% |
| Frequency | 50 – 60 Hz |
| Current | 120 W |
| Particle Size Range | 0.5 – 75µm |
| Porosity Range | 20 – 90% |
| Compression Accuracy | <0.05 mm |
Provided specifications were valid as taken from available documents at time of publication. These specifications may change without notice and are only provided as a general reference
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