To start an analysis you simply create a sample file, or if running multiple samples with the same analysis conditions, choose Quick Start; the Saturn DigiSizer does the rest-- no other operator intervention is required. Sample material is simply placed into the reservoir, the Saturn DigiSizer recognizes its presence and automatically begins the analysis. The optional Autodispersion and Autodilution feature monitors the samples concentration and adds liquid as needed until optimum concentration is obtained. The Saturn DigiSizer then performs the analysis, produces a report, rinses the system, and awaits introduction of the next sample.

Reporting System

For any instrument system employing the static light scattering (SLS) technique, there are two major tasks prior to producing a particle size analysis report. First is to collect a data set that characterizes the scattering pattern, and second is to determine what combination of sizes and relative quantities of particles are represented by the scattering pattern. Then, quantity distribution (number, area, volume or mass) by size and statistics of the distribution can be reported. Reduced data of this type typically is the only output reported by other currently available instruments. The Saturn DigiSizer, however, provides raw data in various formats including graphics of raw light measurements (2-D and 3-D representations), exported ASCII tables of intensity vs. angle data, and an intensity versus angle plot overlaid with a plot of the Mie model set determined to best fit the experimental data. From the reduced data, the Saturn DigiSizer generates the following reports:

All reports can be viewed on screen or printed. The graphs also can be copied to the clipboard and pasted into other applications or stored as image files. You can zoom in on portions of the graphs or shift the axes to examine the fine detail of the distribution. In addition, all plots can be personalized with your choice of fonts and your own company logo on the header for custom reports and presentations. You can compare (via overlays) current analysis results to those of previous analyses or a reference analyses. Summary reports include analysis parameters to assure the analysis was performed under required conditions.

Operating Features

Saturn DigiSizer's powerful and flexible operating program puts you in command of the analysis. It provides all the convenient, easy-to-use features you expect from a Windows-based program such as point-and-click menus, multitasking capability, copy to clipboard, and much more. In addition, the familiar Windows format reduces the time required for training, resulting in almost immediate productivity.

Automatic Sample Handler

The MasterTech Autosampler is designed to increase throughput by ensuring there is no lapse between the completion of one analysis and the beginning of the next. Reduced operator involvement not only limits the possibility of human error, but saves time and increases repeatability and reproducibility. You can queue up to 18 samples to run sequentially and completely unattended. Operation of the MasterTech is controlled by the Saturn DigiSizer's operating software with dispersion and redispersion information being automatically stored in the sample file for future reference.

The MasterTech features a powerful ultrasonic probe. Power to the probe tip is adjustable and the driving circuit is self-tuning for maintaining efficient and consistent sonic energy from the input power. A digital readout on the front panel assures that you reach the desired power for dispersing each sample and that the same power is applied each time the method is repeated.

The Saturn DigiSizer with fully equipped LSHU (Liquid Sample Handling Unit) and a MasterTech provides assurance that every sample is prepared and analyzed exactly the same way, every time. Combined with Saturn DigiSizer's automatic optical alignment, the contribution of instrument variance on analysis results is essentially eliminated and any difference in results can be attributed with confidence to sample variations. You can depend on the results being extremely reproducible. So, if instrument-to-instrument, site-to-site reproducibility or analysis-to-analysis repeatability are important factors in your particle sizing applications, Saturn DigiSizer is the solution.

Sample Handling Module

The Saturn DigiSizer is equipped with a state-of-the-art, patented liquid sample-handling unit (LSHU). The LSHU combined with the instrument software assures that the concentration of the liquid-solid suspension is sufficiently high to produce a strong scattering pattern while sufficiently dilute to negate multiple scattering effects.

The sample handling system maintains a homogeneous and representative suspension flowing through the sample cell while preventing settling of the larger particles due to insufficient transport velocity. Homogeniety is accomplished by maintaining controlled turbulent flow that provides a mixing action sufficient to keep the sample material suspended but gentle enough to do so without creating bubbles.

A centrifugal pump allows the flow-rate to be varied manually or automatically. The pump is integrated into the reservoir, as is an optional, system-controlled ultrasonic probe.

To guard against sample carryover between analyses, the LSHU has a patented reservoir rinse design. While other manufacturers' designs simply fill and empty the reservoir to perform a rinse, the DigiSizer's LSHU has a feature that sprays the reservoir walls as the fluid level recedes. This removes residue that otherwise would cling to the surface.