Combined particle size analysis for dry powders from 0.1 µm to 3,500 µm and suspensions from 0.1 µm to 875 µm in a versatile hybrid system
With the long optical bench, the HELOS/KR laser diffraction sensor covers a particularly wide particle size range. In combination with the OASIS/L unit, which combines dry and wet dispersion into a single hybrid system, this configuration offers reliable and true-to-method particle size analysis both for dry powders ranging from 0.1 µm to 3,500 µm as well as for suspensions and emulsions with finely dispersed particles from 0.1 µm to 875 µm. OASIS/L combines the unique dry dispersion unit RODOS/L with the proven SUCELL/L wet dispersion unit. The change between dry and wet dispersion is made at the push of a button within just a few seconds. All measurement and dispersion parameters can be controlled by the software and saved as retrievable measuring methods (Standard Operating Procedures (SOPs)). In this way, measurements are reliable and independent of the operator, even if the product or application is changed frequently.
When performing dry measurements with RODOS/L, the dosing of the powder sample is performed by the precision vibratory feeder VIBRI/L, which guarantees optimum sample concentration in the free aerosol jet in the measuring zone through a consistent, controlled product supply. The perfectly coordinated combination of measuring range, dosing and dispersion enables a product-specific and precise and repeatable particle size analysis far into the submicron range. Feed rate, dispersion energy, position of the dispersing line and the trigger for the recording of measurements can be automatically reproduced – reliably for every measurement.
When switching to wet measurement the SUCELL/L flow cuvette extends at the push of a button into the measuring zone. Equipped with a stainless steel fluid basin with a nominal volume of 400 ml and a peristaltic pump, SUCELL/L is a proven solution for closed loop measurement tasks. For smaller sample volumes, a small volume adapter allows the analysis volume to be reduced to 50 ml. The powerful sonication is capable of dispersing even highly agglomerated suspensions directly in the basin. Two immersible stirrers reliably homogenise the sample, and the pump ensures that there is a steady flow through the 2 mm measurement cuvette. Rinsing, filling, degassing, addition of additives, pump and stirrer speeds, sonication and the trigger for the measurement can be controlled using the operating display or the software. Different materials are available for gaskets and tubes to ensure that the chemical resistance is matched to the dispersing fluid (Marprene®, silicone, FKM, EPDM or CHEM-SURE®).
- Particle size and particle size distribution
- For alternating dry and wet analyses in the laboratory
- 7 high-resolution measuring ranges from 0.1 µm to 3,500 µm | R1 to R7T
- Automatic adjustment of dispersion parameters | Software-controlled
- Automatic changeover between dry and wet measurements
- RODOS/L: for dry, fine-grained, also cohesive powders from 0.1 µm to 3,500 µm | Sample amount < 1 mg to 1,000 g | Automatic positioning of the dispersing line
- SUCELL/L: for suspensions and emulsions from 0.1 µm to 875 µm | Analysis volume 400 ml (50 ml w/ small volume adapter) | Closed loop | Peristaltic pump | Double stirring unit | Integrated sonication