Particle Size and Shape Analyser

Instrument for particle size and shape characterisation of natural and industrial granular materials. Instrument for particle size and shape characterisation of natural and industrial granular materials e.g.: -Volcanic flow particles (ash, lapilli, pumice, scoria etc.) derived from pyroclastic density currents, fallout deposits, lahars and debris flows. -Industrial particulate materials relevant to construction. -Soils -Construction materials (concretes, mortars, lightweight aggregates, composites) -Agricultural amendments and granules (including Biochar) -Polymer/composite additives -Energy storage materials (electrodes, conductive carbons) Materials will range from coarse granules to fine powders, typically irregular, porous, low-density and black.

Essential requirements (minimum) Measurement capability -Measures both particle size distribution and particle shape in one instrument or tightly integrated system. -Image-based technique (e.g. dynamic image analysis or equivalent) suitable for irregular, opaque, carbonaceous particles. -Provides at least: -Size metrics: equivalent diameter, D10/D50/D90, full distribution. -Shape metrics: aspect ratio, circularity/roundness, and at least one compactness/solidity/convexity parameter. Size range and performance -Usable size range: -Lower limit ≤ 1μm -Upper limit ≥ 5 mm -Capable of analysing polydisperse samples in a single run. -At least 50,000 particles analysed per standard measurement (for powders). -Repeatability better than 3 % RSD on D10/D50/D90 for suitable reference materials.

Sample handling and dispersion -Dry dispersion unit for low-density, porous, angular powders and granules: -Controlled feed (e.g. vibratory feeder or equivalent). -Adjustable dispersion energy/pressure. -Wet dispersion capability: -Recirculating wet cell for suspensions of soils, biochar and carbon powders. -Compatibility with at least water and common alcohols (e.g. ethanol or isopropanol). Shape analysis and classification -Shape parameters computed for all measured particles or size classes. -Ability to filter and analyse particles by size and/or shape (e.g. size range, aspect ratio range). -Display and export of representative particle images for documentation and publications.

Software, data handling and reporting -Method/SOP editor for storing and recalling measurement conditions. -Export of size and shape data in standard formats (e.g. CSV, Excel). -Overlay and comparison of multiple measurements. -Configurable reports (number/area/volume distributions, cumulative and density plots, basic shape statistics). Calibration and practical aspects -Calibration/verification with traceable particle size standards in relevant ranges. -Documented traceability to relevant particle sizing standards (ISO/ASTM or equivalent). -Design suitable for dusty, abrasive, black powders, with straightforward cleaning of the dispersion path. -Enclosed optics and standard laser/electrical safety compliance. -Access to local service and technical support. 3.

Desirable (nice-to-have) features Extended capabilities -Integrated laser diffraction module (wet and/or dry) using the same dispersion units, providing sub-micron coverage (≈0.1 μm or lower). -Dedicated fibre/rod analysis (length, width, L/W ratio) for fibrous chars/carbon fibres. -Extended upper size limit to ≥ 10 mm for large granules and aggregates. -Interchangeable optics/lenses to optimise measurements for fine powders vs coarse granules. Advanced dispersion and handling -Multiple dry disperser configurations (gentle and aggressive). -Integrated anti-static measures (e.g. ioniser) for very fine, low-density powders. -Low-volume wet cells (few mL) for expensive or low-yield materials. -Integrated, controllable ultrasonic dispersion (power and time) with logging.

Automation and integration -Optional autosampler for unattended measurement of multiple samples. -API or scripting interface for method control and automated data extraction. -Database/LIMS connectivity for long-term storage and retrieval of results. Robustness -Wear-resistant materials in nozzles and flow paths. -Design that minimises cross-contamination.