Εργαστηριακά Κόσκινα με Αέρα (Air Jet)

Τα κόσκινα με αέρα (Air Jet), διαχωρίζουν λεπτές, χαμηλής πυκνότητας σκόνες με ρεύμα συμπιεσμένου αέρα αντί για δόνηση. Κατάλληλα για πλέγματα ≥10 µm, παρέχουν γρήγορη και ακριβή ανάλυση μεγέθους των κόκκων.

Category Εργαστηριακά Κόσκινα Brand: RETSCH

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Air Jet Sieving Machines

The RETSCH Air Jet Sieving Machines are specifically designed for the precise and gentle analysis of fine powders and low-density materials that tend to agglomerate. Instead of mechanical agitation, a controlled jet of compressed air separates particles, making the process ideal for delicate or cohesive materials. Sieving can be performed on mesh sizes from 10 µm and above, with typical sieving times of only 2–3 minutes.

Key Features & Benefits

🟦 All-in-One Functionality – Combines sieving, weighing, and evaluation in a single device.
🟦 Flexible Sieving – Suitable for powders from 10 µm to ~4 mm.
🟦 Enhanced Process Reliability – Automatic checks, assistants, and reproducible separation.
🟦 Gentle on Samples – No mechanical sieving aids required, minimizing particle damage.
🟦 GMP Conformity – AS 200 jet pharma ensures regulatory readiness.
🟦 User-Friendly Operation – Quick Start Mode, touch display controls, and adjustable vacuum/nozzle speed.

The AS 200 jet is the standard model for 203 mm (8″) sieves, featuring manual or optional automatic vacuum control and is ideal for rapid sieving with the Open Mesh Function. The AS 200 jet pro is an advanced version with integrated weighing and software, enabling fully automated sieving, evaluation, and data handling. The AS 200 jet pharma is a GMP-compliant model designed for regulatory-sensitive laboratories, offering the same all-in-one functionality with validation-ready features.

These machines provide a highly efficient, reproducible, and compact solution for fine particle analysis in research, quality control, and production monitoring, reducing operator workload while maximizing accuracy.

AS 200 jet

The AS 200 jet is specifically designed for test sieves with a diameter of 203 mm/8“ (or 200 mm with adapter). The air jet generated by an industrial vacuum cleaner can be adjusted by using the manual vacuum regulation. Optionally, an automatic vacuum regulation is available. The Open Mesh Function, a procedure which greatly reduces the number of near-mesh particles, provides optimum separation efficiency, excellent reproducibility and a longer service life of the sieves. Sieving time and nozzle speed are conveniently selected with a single button; the settings are shown in the graphic display. The Quick Start Mode is used to start the sieving process under standard conditions without entering parameters.

Accuracy & Efficiency

🟦 Air jet technology for dispersion and deagglomeration
🟦 Measuring range 10 μm to 4 mm
🟦 Quick, efficient procedure
🟦 Open Mesh Function reduces near-mesh particles
🟦 Digital parameter setting (time, vacuum, speed)
🟦 Quick Start option
🟦 Variable nozzle speed
🟦 Automatic vacuum regulation and cyclone (options)
🟦 Memory for 9 Standard Operating Procedures (SOPs)
🟦 Suitable for RETSCH standard sieves

Applications & Typical Sample Materials

The RETSCH Air Jet Sieve AS 200 jet is ideal for precise separation, fractioning, and particle size determination of fine powders. It is particularly suited for agglomerated or sensitive materials, providing gentle, reproducible, and rapid sieving for research, quality control, and industrial applications.

🟦 Pharmaceutical materials – tablets, excipients etc.
🟦 Ceramics – powders and precursors
🟦 Chemical products – fine chemicals and reagents
🟦 Cosmetics – powders and pigments
🟦 Food – flours, cocoa, spices, additives
🟦 Minerals – ores, clays, refractory powders

🟦 Pigments – colorants for coatings and inks
🟦 Plastics – polymer powders and granulates
🟦 Powder coating – fine powders for surface finishing
🟦 Rubber – elastomer powders and compounds
🟦 Toner particles – printing and imaging materials
🟦 Washing powder – detergents and cleaning agents

Functional Principle

The AS 200 jet is equipped with a rotating slotted nozzle. The sieve and lid are placed above the nozzle. A vacuum generates a strong jet of air which disperses the particles on the sieve through the slotted nozzle. The material which is smaller than the mesh size of the sieve is transported by the back flow of the air to the cyclone or to the vacuum cleaner. The air jet helps to deagglomerate the particles and constantly purges the sieve mesh.

AS 200 jet pro / AS 200 jet pharma

For sieving specialists, the AS 200 jet pro and the GMP-conform AS 200 jet pharma offer a space-saving, user-friendly all-in-one sieving system. These machines combine air jet sieving, integrated weighing, and automated evaluation in a single device, ensuring precise, reliable, and reproducible results for fine powders.

Key Benefits & Features

Both models offer all-in-one functionality with smart, user-friendly design. The AS 200 jet pro provides enhanced process reliability, precise sieving of powders from 10 µm to ~4 mm, and quick results. The AS 200 jet pharma extends these benefits to regulatory-sensitive laboratories, meeting GMP requirements.

Key features include:
🟦 Integrated internal balance with high sensitivity (0.01 g), robust and patented for laboratory use
🟦 Touch display with intuitive 10-inch interface for easy operation and result evaluation
🟦 Connectivity options: LAN and USB interfaces for data transfer
🟦 User and audit trail management (optional in pharma version)
🟦 Compact footprint: 460 x 288 x 305 mm, ideal for bench-top use

Air Jet Sieving Technology

The machines employ modern air jet technology, which disperses and deagglomerates fine powders without the need for mechanical sieving aids. This method protects sensitive samples and ensures efficient separation even for materials prone to clumping. The operator can adjust vacuum, nozzle speed, and sieve height individually, allowing highly controlled sieving processes. Typical sieving times are 2–3 minutes, making the workflow fast and efficient.

🟦 Open Mesh Function reduces near-mesh particles and improves sieve longevity
🟦 Digital control of all parameters: time, vacuum, speed
🟦 Quick Start Mode for standard operations
🟦 Memory for SOPs: store up to 9 standard operating procedures

Combined Sieving and Weighing – Patented Advantage

A key innovation of the AS 200 jet pro series is the patented integration of weighing and sieving. The airtight sieving chamber allows precise weighing by mechanically decoupling the chamber from the vacuum system, eliminating the need for manual transfers. This approach ensures error-free, reproducible weighing while also allowing immediate particle size evaluation using the integrated software.

Advantages include:
🟦 Eliminates material loss and handling errors
🟦 Reduces laboratory steps and saves time
🟦 Provides high reproducibility and precision in every measurement

Workflow & Software

The AS 200 jet pro software provides full control of sieving, weighing, and evaluation through a touch display. SOPs can be pre-programmed for repeatable, standardized analyses, with results shown graphically or in tables and exported via USB or LAN. Optional user management is available in the pharma version.

Key software functions:

🟦 Sieve Management
🟦 Parameter Setup
🟦 Method Setup (SOPs)
🟦 Sieve Analysis
🟦 Weighing
🟦 Data Evaluation & Reporting
🟦 Optional User Management (pharma)

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