Retsch AS200 DIGIT CA Controlled-Amplitude Sieve Shaker

Overview

The Retsch AS200 DIGIT CA is a precision-engineered electromagnetic sieve shaker designed for reproducible, method-controlled dry and wet particle size analysis in laboratory and quality control environments. Unlike mechanically driven shakers, its digitally regulated electromagnetic drive delivers consistent 3D抛掷 (tossing) motion—characterized by vertical lift, horizontal displacement, and rotational dispersion—ensuring uniform sample distribution across the full sieve surface. This motion minimizes particle stratification and agglomeration effects, significantly improving sieving efficiency and statistical reliability of results, especially for fine powders (down to 20 µm) and cohesive or electrostatically charged materials. The instrument operates under controlled amplitude conditions, allowing users to optimize energy input per application—critical for fragile granules (e.g., pharmaceutical granules, roasted coffee particles) or dense aggregates (e.g., slag, mineral ores). Its modular design supports sieve stacks up to 510 mm in height and accommodates up to 17 sieve levels when using standardized 200 mm or 203 mm diameter analytical sieves.

Key Features

• Digital amplitude control (0.2–3.0 mm) with real-time digital display of vibration amplitude and elapsed sieving time
• Programmable sieving duration from 1 to 99 minutes, plus fixed-interval operation (10 s on / 10 s off) for controlled energy input
• Electromagnetic drive system—maintenance-free, silent, and free of mechanical wear or lubrication requirements
• Ergonomic front-access design with intuitive membrane keypad and clear LED status indicators
• Interchangeable clamping systems (“Standard” and “Comfort”) compatible with both dry and wet sieving protocols
• IP21-rated housing ensures operator safety and protection against vertically falling drips during wet sieving
• Support for multiple sieve diameters: 100 mm (for small-sample R&D), 200 mm, and 203 mm (8″) standard ASTM/ISO-compliant sieves
• CE-marked and engineered to meet essential health and safety requirements for laboratory equipment within the EU Machinery Directive

Sample Compatibility & Compliance

The AS200 DIGIT CA handles a broad spectrum of particulate materials—including free-flowing powders (e.g., flour, metal powders), semi-cohesive granules (e.g., fertilizers, plastic pellets), friable organic matter (e.g., ground seeds, roasted coffee), and abrasive industrial feedstocks (e.g., cement clinker, blast furnace slag). It supports both dry sieving (per ISO 9276-2, ASTM E11) and wet sieving (per ISO 11277, ASTM C136/C702), with optional liquid-tight sealing kits available for aqueous suspensions. All operational parameters—including amplitude, time, and interval mode—are fully documented and traceable, enabling compliance with GLP and internal QA/QC documentation standards. While the device itself does not include built-in audit trail or electronic signature functionality, its repeatable, parameter-locked operation supports validation protocols required under ISO/IEC 17025-accredited testing laboratories.

Software & Data Management

The AS200 DIGIT CA operates as a standalone instrument with no embedded PC or proprietary software. All settings are configured locally via the front-panel interface and retained in non-volatile memory for recall across sessions. For integration into laboratory information management systems (LIMS), users may log parameters manually or via external time-stamped observation records. Optional USB connectivity (available on select configurations) enables firmware updates and calibration verification data export—though raw sieving data (mass-on-sieve) must be recorded externally (e.g., balance output, spreadsheet, or LIMS entry). The unit supports periodic recalibration of amplitude and timer functions using certified reference tools traceable to national metrology institutes.

Applications

This sieve shaker is routinely deployed across industries requiring strict particle size distribution (PSD) characterization: in pharmaceutical manufacturing for excipient grading and blend uniformity assessment; in agrochemical R&D for pesticide formulation particle retention studies; in construction materials labs for grading sand, gravel, and recycled concrete aggregates; in food science for cereal milling consistency checks and nut fragmentation analysis; and in metallurgy for classification of atomized metal powders used in additive manufacturing. Its adaptability to both fine (5 mm) fractions—without mechanical reconfiguration—makes it particularly valuable for tiered sieve analysis workflows compliant with ISO 13320 and USP .

FAQ

Is the AS200 DIGIT CA suitable for regulatory-compliant QC testing?
Yes—its parameter stability, CE certification, and repeatability support use in GMP-adjacent environments where method validation and equipment qualification are performed.
Can I use standard ASTM E11 or ISO 3310-1 sieves with this instrument?
Yes—sieves with 100 mm, 200 mm, and 203 mm (8″) diameters and standard frame heights are fully compatible.
Does it support wet sieving with water or solvent-based slurries?
Yes—when equipped with the Comfort clamping system and appropriate gaskets, and operated within IP21 environmental limits.
What is the maximum allowable mass per sieve layer during operation?
The total stack load must not exceed 3 kg; individual sieve loads should be kept below 1.5 kg to maintain motion fidelity and prevent damping.
How often does the instrument require calibration or maintenance?
No routine maintenance is needed due to the contactless electromagnetic drive; however, annual amplitude and timer verification against traceable standards is recommended for QA-critical applications.