Retsch AS200 Jet Air Jet Sieve Analyzer

Overview

The Retsch AS200 Jet Air Jet Sieve Analyzer is an ISO 9001–certified, precision-engineered instrument designed for the rapid, reproducible dry sieving of fine, low-density, and cohesion-prone powders. Unlike conventional vibratory or mechanical shaker sieves, the AS200 Jet employs a hybrid separation principle combining controlled vertical tapping motion with precisely regulated pulsed air jets directed tangentially across the sieve mesh surface. This air-assisted dynamic sieving mechanism fluidizes particles without mechanical abrasion, minimizing agglomeration, static charge buildup, and particle attrition—critical for fragile, electrostatically sensitive, or ultrafine materials down to 10 µm. The system complies with ASTM E11, ISO 3310-1, and ISO 2591-1 standards for test sieves and sieving methods, ensuring regulatory alignment for QC laboratories operating under GLP, GMP, or ISO/IEC 17025 frameworks.

Key Features

• Dynamic air jet technology: Synchronized pulsating airflow (adjustable frequency and pressure) enhances particle dispersion while preserving morphology and crystallinity.
• OPEN MESH function: A proprietary algorithm-driven mode that dynamically modulates air pulse timing relative to sieve oscillation phase, enabling high-fidelity separation of particles with nominal sizes close to the mesh aperture—significantly improving resolution at the lower detection limit (e.g., 10–20 µm).
• Fixed-frequency, high-reproducibility tapping: 280 min⁻¹ (4.67 Hz) oscillation with 150 controlled taps per cycle ensures mechanical consistency across batches and operators.
• Integrated cyclone separator option: Enables two-stage classification—coarse fraction retained on sieve, fines collected via cyclonic separation—eliminating manual transfer and cross-contamination risk.
• 200 mm (8″) standard sieve compatibility: Optimized for Retsch’s certified stainless-steel analytical sieves (ISO 3310-1, wire diameters from 25–125 µm), with traceable calibration certificates available per sieve.
• Robust, maintenance-minimized architecture: Sealed motor housing, wear-resistant aluminum alloy frame, and tool-free sieve clamping reduce downtime and operator dependency.

Sample Compatibility & Compliance

The AS200 Jet is validated for use with free-flowing and marginally cohesive powders exhibiting densities between 0.1–3.5 g/cm³. It is routinely applied to cementitious materials, pharmaceutical excipients (e.g., microcrystalline cellulose, lactose monohydrate), food-grade starches and flours, polymer granules, ceramic precursors, and catalyst supports. Samples must be dry (<0.5% moisture content) and non-fibrous; hygroscopic or electrostatically charged materials benefit from optional nitrogen purge integration. All operational parameters—including air pressure, pulse duration, and total sieving time—are logged with timestamp and user ID, supporting 21 CFR Part 11–compliant audit trails when paired with Retsch’s RS232/USB-enabled software suite.

Software & Data Management

Data acquisition and reporting are managed via Retsch’s proprietary Evaluation Software (v3.2+), compatible with Windows 10/11. The interface supports real-time mass loss monitoring, automatic calculation of cumulative undersize distribution (% w/w), D10/D50/D90 statistics, and graphical overlay of multiple runs. Export formats include CSV, PDF (with embedded calibration metadata), and XML for LIMS integration. Raw sensor logs (tapping count, air pressure cycles, temperature drift) are archived separately for root-cause analysis during method validation or deviation investigations. Software updates are distributed through Retsch’s secure customer portal, with version-controlled release notes aligned to ICH Q5A and ISO 13485 documentation requirements.

Applications

• Pharmaceutical: Granule size distribution verification prior to tablet compression; API blend uniformity screening per USP .
• Construction materials: Cement fineness testing per EN 196-6; fly ash and slag reactivity grading.
• Food & feed: Flour particle homogeneity assessment for baking performance; spice particle release kinetics modeling.
• Polymers: Recycled PET flake sizing for extrusion feed consistency; toner powder classification in electrophotographic processes.
• Research & development: Method development for novel nanocomposite dispersions where conventional sieving yields false coarser readings due to agglomeration.

FAQ

What sieve diameters are supported?
The AS200 Jet is engineered exclusively for 200 mm (8 inch) diameter test sieves compliant with ISO 3310-1. Retsch offers certified stainless-steel sieves from 10 µm to 4 mm aperture, each supplied with individual calibration documentation.
Can the AS200 Jet be used for wet sieving?
No. This instrument is strictly for dry sieving applications. Moisture compromises air jet efficiency and introduces clogging risk. For wet particle sizing, consider laser diffraction (e.g., Retsch PS100) or sedimentation-based systems.
Is method validation support available?
Yes. Retsch provides IQ/OQ documentation templates, along with application notes demonstrating repeatability (RSD <2.5% for D50 across n=6 replicates) and intermediate precision per ICH Q2(R2). Full validation packages are available upon request through authorized distributors.
How is calibration verified?
Calibration is performed using NIST-traceable reference powders (e.g., SRM 1979) and verified annually via Retsch-certified service engineers. Internal diagnostics monitor motor torque stability, air pressure linearity, and tap counter accuracy in real time.
Does the system meet FDA requirements for electronic records?
When operated with Evaluation Software v3.2+ and configured with user access controls, electronic signature enforcement, and audit trail activation, the AS200 Jet meets core technical requirements of 21 CFR Part 11 for electronic records and signatures in regulated environments.