SediGraph

Category Particle Size Tag Particle Size

Particle size distribution of inorganic particles by x-ray sedimentation (X-ray sedimentation) – an industry standard for more than four decades

Measurement range 0.1 – 300 µm (equivalent spherical diameter) – Stokes’ settling law with direct mass measurement by X-ray absorption
Complete particle accountability – includes fractions outside the direct measurement range
Large sample (50 mL of dispersed sample) – representative for heterogeneous materials, no need for precise concentration
Optional automation – up to 18 unattended samples with the MasterTech 052 autosampler
Compliant with ISO 13317-3, ASTM B761 and ASTM Committee C28 (advanced ceramics)

Combining data with other particle size methods extends the reporting range up to 125,000 µm (125 mm) – useful for geological applications
Scan of the sedimentation cell from bottom to top – accurate accounting of fast-settling particles with faster resolution of fine particles
Fully automatic operation increases sample throughput and reduces the possibility of operator error
Temperature-controlled analysis – stable liquid properties during measurement ensure repeatability
SPC (statistical process control) reports – monitoring of production processes and fast response to deviations
Software: point-and-click interface, customizable reports with a lab logo, data export; graphs – cumulative mass/surface area/number, settling velocity distribution, log-probability, Rosin-Rammler, regression analyses and more; size display also in Phi units
Optional MasterTech 052 autosampler – ultrasonic probe for sample redispersion (adjustable power, self-tuning drive circuit), up to 18 samples in sequence, fully unattended
SediSperse® – Micromeritics’ line of dispersion liquids (9 aqueous and organic variants) for maximum suspension and prevention of particle agglomeration
Typical applications: ceramics, metal powders, geology/soil, cosmetics, pigments, catalysts, construction materials, minerals and inorganic chemicals, abrasives

Measurement range	0.1 – 300 µm, equivalent spherical diameter
Sample size	50 mL of dispersed sample – precise concentration not required
Dispersion liquids	any liquid compatible with the cell materials and weakly absorptive to X-rays (typically water, glycols, mineral oils, SediSperse®, alcohols)
Wetted materials	stainless steel, Teflon-impregnated anodized aluminum, nickel-plated aluminum, nylon, polypropylene, polystyrene, Tygon®/Pharmed® tubing, tungsten carbide, Ertalyte®, Viton®, Buna-n, epoxy
Power	85 – 264 VAC, 47/63 Hz, 450 VA
Temperature	operating: ambient +10 to 40 °C · storage/transport: -10 to 55 °C
Humidity	20 – 80% (non-condensing)
Dimensions	H 52 × W 50.5 × D 58 cm · weight 43 kg

Source: micromeritics.com/products/sedigraph and the “SediGraph III Plus” brochure (Micromeritics Instrument Corporation, internal archive).