AS 200 Control: Vibratory Sieve Shaker for Reproducible Particle Size Analysis

The microprocessor‑controlled measuring and control unit of the AS 200 control model maintains a constant vibration height, ensuring 100% reproducibility of results across different AS 200 control shakers. 

This product's key feature is its use of sieve acceleration as the parameter, which is independent of power frequency, rather than vibration height. It is also possible to calibrate the instrument to achieve comparable, reproducible results globally.

The system meets the requirements of DIN EN ISO 9001 standards.

Operating an AS 200 control is seamless and rapid, as all the sieving conditions, including vibration time, height, and interval, are set, displayed, and monitored digitally. The system can store up to 99 standard operating procedures for regular analyses.

The system can be connected to a personal computer via an integrated interface and controlled with the EasySieve^® evaluation software. This program allows users to perform the complete sieving process and document it with convenience, accuracy, and compliance with standards.

Video Credit: Retsch GmbH

Accuracy and Efficiency

Image Credit: Retsch GmbH 

• For sieves up to (Ø) 203 mm
• Measuring range 20 μm to 25 mm
• Sieving with 3-D effect
• Test materials monitoring according to DIN EN ISO 9001
• Memory for 99 standard operating procedures (SOPs)
• Suited for wet and dry sieving
• Sieve acceleration independent of power frequency
• Digital setting and control of sieving parameters
• Patented electromagnetic drive (EP 0642844)

Safe and Simple Operation

Image Credit: Retsch GmbH

The AS 200 control is easy and convenient to operate, with users able to digitally set, display, and monitor the sieving parameters such as the vibration time, height, and interval. The system allows storage of as many as 99 SOP parameter sets for routine analysis.

The device can be connected to a personal computer using an integrated interface and controlled with the EasySieve^® evaluation software. Users can seamlessly and accurately manage the entire sieving process and its documentation.

Wet Sieving with Vibratory Sieve Shakers

Wet sieving is an ideal solution commonly used to sieve suspensions and very fine samples (<45 μm) that tend to agglomerate. RETSCH provides different ranges of vibratory sieve shakers for wet sieving.

The systems also come with special accessories, such as collecting pans with outlets and clamping lids with spray nozzles. The system’s venting rings between the sieves prevent the escape of sample material or liquid by expanding the air cushions.

Image Credit: Retsch GmbH 

Accessories and Options 

A variety of accessories are available for RETSCH sieve shakers, enabling them to meet different application needs.

Clamping units. Image Credit: Retsch GmbH

Test sieves. Image Credit: Retsch GmbH

Clamping Units

Sieves can be clamped seamlessly, rapidly, and safely onto the sieve shaker with RETSCH clamping devices. These devices help to save time and are user-friendly.

Accessories for Test Sieves

Intermediate pans, sieve lids, intermediate rings, and collecting pans

Accessories for Wet Sieving

Collecting pans with outlet, clamping lid with nozzle, venting rings

Ultrasonic Baths and Dryers

Designed for effective cleaning of test sieves and for quick, gentle drying of sieves as well as samples

Sample dividers. Image Credit: Retsch GmbH 

Ultrasonic baths and dryers. Image Credit: Retsch GmbH 

IQ/OQ Documents

Retsch provides IQ/OQ documentation for the control sieve shakers to support IQ/OQ certification by its customers.

Sample Dividers

Meaningful results are only achieved when the sample accurately represents the original material. Sample dividers generate representative subsamples, ensuring reproducibility of the analysis.

Sieving Aids

Chain rings, cubes, brushes, balls (e.g., for minimizing agglomerations when sieving particles <100 μm and keeping the mesh unclogged)

EasySieve/EasySieve CFR Evaluation Software

EasySieve evaluation software is an ideal solution for particle analysis and offers superior performance when compared to manual evaluation. It can automatically control the weighing protocols, from registering the sieve weight to evaluating data and performing the required measurements. The software is FDA 21 CFR Part 11-compliant and easy to use.

Image Credit: RETSCH GmbH

Functional Principle

All AS 200 sieve shakers use an electromagnetic drive, a RETSCH-patented technology (EP 0642844). This drive generates a three-dimensional throwing motion for equal sieving of the product across the entire sieving surface. The system offers reduced sieving times with improved efficiency. It has a high stress capacity and ensures a smooth operational workflow.

Video Credit: RETSCH GmbH

Technical Data

Source: RETSCH GmbH