Stationary cuvette for wet dispersion of smallest sample amounts
The CUVETTE is a wet dispersing system for our laser diffraction sensor HELOS and is specially designed for particle size analysis of suspensions and emulsions with small sample volumes of less than 50 ml as CUVETTE 50 and SYSIPHUS or less than 6 ml as CUVETTE 6.
The three cuvette variants can each be placed as a module on the basic module carrier. Changing modules is easy, as the module carrier can be pulled out in front of the HELOS. When pulled out, the laser protection cover of the modules can be opened and the dispersion of the sample can be visually checked using a magnetic stirrer. In measuring mode, the closed laser safety cover provides extended protection.
The cuvettes for CUVETTE 50 and 6 are made out of high-quality optical glass only and no glue has been used for its construction, so any contamination of the suspension or emulsion is strictly avoided. The sample is completely conserved for future use, which makes this device to an ideal choice for expensive and/or pharmaceutical samples.
SYSIPHUS consists of a robust stainless-steel housing and is characterised by the integrated liquid circuit which, in combination with the measuring distance of 2 mm, enables particularly easy sample dosing. All cuvettes can also be used with a PTFE lid to prevent evaporation of hazardous liquids.
CUVETTE 6
The streamlined geometry of the 6 ml stationary cuvette ensures that even small sample volumes are optimally presented. A PTFE coated manual stirrer delivers the necessary homogenisation of the sample prior to the measurement.
CUVETTE 6 combined with HELOS/BR is suitable for wet measurement of smallest amounts of finely dispersed samples with particle sizes ranging from 0.1 µm to 87.5 µm within measuring range R1 to R2.
CUVETTE 50
The geometry of the 50 ml stationary cuvette produces a long optical path for the laser beam (over 20 mm) in the sample liquid, thereby enabling the optimum concentration for reliable measurements - even with low sample concentrations. The titanium finger of the highly-efficient sonotrode can be manually lowered into the cuvette as required. The energy input for the dispersion can be precisely controlled by the software. The necessary homogenisation of the sample during the measurement is achieved with the aid of a PTFE-coated magnetic stirrer with adjustable speed. CUVETTE 50 combined with HELOS/BR or HELOS/KR is suitable for wet measurement of small amounts of finely dispersed samples with particle sizes ranging from 0.25 µm to 3,500 µm within measuring range R2 to R7.
SYSIPHUS
SYSIPHUS is a dispersing system similar to a QUIXEL, but can be used with small sample volumes of only 50 ml. The integrated centrifugal pump transports the sample through the flow-through cuvette. Additional dispersion is provided by an ultrasound system that can be easily switched on as required. In addition, the stainless-steel cuvette offers high chemical resistance for a wide range of samples.
In the measuring ranges from R1 to R5, particles from 0.1 to 875 µm are reliably dispersed and analysed.
