Retsch AS 200 DIGIT CA Digital Sieve Shaker

Overview

The Retsch AS 200 DIGIT CA is a high-precision, digitally controlled electromagnetic sieve shaker engineered for reproducible particle size distribution analysis in laboratory and quality control environments. Operating on the principle of three-dimensional oscillatory motion—generated via a maintenance-free electromagnetic drive—the instrument induces controlled vertical and horizontal acceleration, enabling uniform sample dispersion across the full sieve surface. This 3D抛动 (tossing) motion minimizes particle segregation and agglomeration, ensuring statistically representative fractionation even for challenging materials such as cohesive powders, granules, or irregularly shaped particles. Designed for compliance with standardized sieving methodologies—including ISO 2591-1, ASTM E11, and EN 933-1—the AS 200 DIGIT CA delivers traceable, operator-independent results essential for method validation, regulatory submissions, and routine QC workflows.

Key Features

• Digital amplitude control (0–3 mm adjustable in 0.1 mm increments), enabling method optimization for both dry and wet sieving protocols
• Real-time digital display of vibration amplitude (in mm), elapsed sieving time (in seconds), and active interval mode status
• Programmable interval operation with fixed 10-second pauses between shaking cycles—critical for heat-sensitive or fragile samples requiring thermal dissipation or mechanical relaxation
• Ergonomic stack design accommodating up to 17 nested sieves (or 9 standard-height sieves) with total stack height up to 510 mm, compatible with Retsch’s full range of ISO/ASTM-certified test sieves (including stainless steel, brass, and nylon mesh options)
• Electromagnetic drive system with zero mechanical wear, eliminating the need for lubrication, belt replacement, or periodic calibration of moving parts
• Integrated overload protection and automatic shutdown upon abnormal load detection (e.g., jammed sieve stack or excessive mass >3 kg)

Sample Compatibility & Compliance

The AS 200 DIGIT CA supports a broad spectrum of particulate materials—from brittle pharmaceutical granules and ceramic powders to abrasive mineral ores and polymer flakes—within its validated measurement range of 20 µm to 25 mm. Its dry/wet dual-mode capability accommodates aqueous or solvent-based suspensions when used with Retsch’s wet-sieving accessories (e.g., sealed sieve holders and liquid containment trays). All operational parameters—including amplitude, duration, and interval timing—are fully documented and exportable, supporting audit readiness under GLP, GMP, and FDA 21 CFR Part 11 requirements when paired with Retsch’s optional software suite. The instrument meets CE marking requirements per Machinery Directive 2006/42/EC and EMC Directive 2014/30/EU.

Software & Data Management

While the AS 200 DIGIT CA operates as a standalone unit with embedded digital controls, it integrates seamlessly with Retsch’s RETSCH Laboratory Software (v3.0+), enabling automated parameter logging, electronic signature capture, user access level management, and PDF report generation compliant with ISO/IEC 17025 documentation standards. All sieving runs are timestamped and associated with operator ID, sample ID, sieve set configuration, and environmental metadata (e.g., lab temperature/humidity if externally logged). Audit trails record all parameter changes, start/stop events, and error states—ensuring full data integrity for regulatory review.

Applications

• Pharmaceutical: Excipient particle sizing, blend uniformity assessment, and granule classification prior to tableting or capsule filling
• Food & Agriculture: Flour fineness testing, grain grading, spice particle distribution, and feed pellet durability evaluation
• Materials Science: Metal powder characterization for additive manufacturing feedstock qualification
• Geology & Mining: Soil texture analysis, aggregate gradation for civil engineering specifications (AASHTO T 27, ASTM C136)
• Chemicals & Polymers: Catalyst support screening, pigment dispersion validation, and resin bead sizing

FAQ

What is the maximum allowable sieve stack height?
The AS 200 DIGIT CA supports a total stack height of up to 510 mm, accommodating either 9 standard-height sieves or 17 low-profile sieves.
Can this instrument be used for wet sieving?
Yes—when equipped with Retsch’s wet-sieving accessories (e.g., sealed sieve holders and splash guards), the AS 200 DIGIT CA performs validated wet sieving in accordance with ISO 2591-2 and ASTM D6913.
Is amplitude calibration required?
No—the electromagnetic drive system maintains factory-calibrated amplitude linearity across its full 0–3 mm range; no field recalibration is necessary.
How does the interval mode function?
Interval mode executes a fixed 10-second pause after each defined sieving period, allowing for sample cooling, de-agglomeration, or manual inspection without interrupting the overall method sequence.
Does the device meet FDA 21 CFR Part 11 requirements?
Yes—when operated with RETSCH Laboratory Software and configured with electronic signatures, audit trails, and role-based access control, the system satisfies Part 11 criteria for electronic records and signatures.