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Configurations and Options

The Saturn DigiSizer II System includes many options that allow you to tailor your instrument according to your specific needs. Multiple sample dispersion system options, an automatic autosampler, and a device for removing dissolved gases from the suspension liquid are available and contribute to the versatility of the system. These options are all designed and manufactured with the same care and attention to detail that produced the Saturn DigiSizer.

Liquid Sample Handling Units
The Saturn DigiSizer II’s sample handling unit ensures that every sample will be correctly dispersed. Micromeritics’ patented, state-of-the-art liquid sample handling units (LSHU) work with the instrument software to assure that sample suspension is of the proper concentration. A continuous flow through the reservoir provides a mixing action sufficient to keep all sample material suspended and prevents the settling of particles. The LSHU has several automated features such as a built-in ultrasonic probe, automatic liquid level control, particle concentration detection, and a sample circulation system that continuously maintains dispersion. Auto-dispersion and auto-dilution features monitor the sample’s concentration and add liquid as needed until optimum concentration is obtained.

To reduce the possibility of sample carryover between analyses, the LSHU has a patented reservoir rinse design. While other designs simply fill and empty the reservoir to rinse, the Saturn DigiSizer’s LSHU has a feature that sprays the reservoir walls as the fluid level recedes. This removes residue that otherwise might cling to the surface.

The LSHU System is available in two configurations, a standard version and a low-volume version. Micromeritics can help you determine the LSHU that fits your specific needs.

 

 

Standard Liquid
Sample Handling Unit
The standard unit includes a reservoir that is adjustable between 590 to 690 mL of dispersed sample with a circulation pump rate of 5 – 19 L per minute. It can circulate particles from 0.04 to 2500 µm. The high flow rate better supports particles that have an inherently higher settling velocity. In addition, the higher system clearance helps to avoid attrition of the particles during circulation.

Applications:

• Coarse particles

• High-density particles

• Quantity of sample, liquid supply and/or waste disposal is not a problem

Low-Volume
Liquid Sample Handling Unit
The low-volume unit includes a reservoir that is adjustable between 100 to 120 mL of dispersed sample with a circulation pump rate of 2 – 12 L per minute. It can circulate particles from 0.04 to 750 µm in diameter. The low-volume liquid sample handling unit reduces cost by using smaller amounts of sample, and reduces the expense of waste disposal.

Applications:

• Sample quantity is limited

• Supply of dispersion liquid is limited and/or expensive

• Dispersion liquid may be hazardous to use and/or make disposal difficult

 

Particle Size Sample Preparation Accessories:

 

MasterTech 052
Automatic Sample Feeder

 

The MasterTech Autosampler provides assurance that all samples are prepared and analyzed exactly the same way. The MasterTech is designed to increase throughput, repeatability, and reproducibility while reducing operator involvement. Up to 18 samples can be queued to run sequentially and completely unattended, including automatic stirring or sonication prior to transfer to the analysis system. The Saturn DigiSizer II’s operating software controls the MasterTech, and information about dispersion is stored in the sample file for future reference.

The MasterTech features a powerful ultrasonic probe for sample dispersion. Power to the probe tip is adjustable and the driving circuit is self-tuning for maintaining efficient and consistent sonic energy levels. A front-panel digital readout lets you know when the desired power is reached, and that same power is applied each time the method is repeated.

AquaPrep II
Water Preparation System

AquaPrep II
When using water as a suspension liquid during particle size analysis, it is possible for atmospheric gases to be released from solution forming minute bubbles that become incorporated with the sample dispersion. This has a disruptive effect on particle size analysis because the bubbles circulate through the measurement zone of the analyzer and are detected as if they were particles. This can result in the reporting of particle size classes that are not actually present. Removing these bubbles is required for obtaining the most accurate particle size data, particularly when using a highly sensitive analyzer like the Saturn DigiSizer II. Micromeritics’ AquaPrep solves this problem by recirculating water through a hydrophobic capsule consisting of many thin-walled capillaries. A vacuum pump provides low pressure on the outside of the capillaries. The result is a diffusion of dissolved air from the water through the capillary walls and removal through the vacuum pump.

The AquaPrep can prepare 10 liters of water in less than 2 hours (at standard temperature and pressure) and ensures that you obtain the most accurate representation possible of the particle size distribution in your sample.