Gilson GilSonic UltraSieve® Sonic Sifter GA-8
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | GA-8 |
| Pricing | Upon Request |
Overview
The Gilson GilSonic UltraSieve® Sonic Sifter GA-8 is an advanced, microprocessor-controlled dry powder sieving instrument engineered for high-fidelity particle size distribution analysis of fine and ultrafine materials. Unlike conventional mechanical shakers or rotary sievers, the GA-8 employs resonant acoustic energy—generated at 60 Hz (3600 cycles per minute)—to induce controlled longitudinal oscillations within the air column enclosed between stacked test sieves. This ultrasonic excitation agitates particles uniformly across the entire sieve surface, overcoming interparticle adhesion, electrostatic forces, and moisture-induced agglomeration without mechanical impact or vibration transmission to the sample bed. The result is a highly reproducible, operator-independent separation process compliant with ASTM E11, ASTM E161, ISO 565, and ISO 3310-1 standards. Designed for laboratory environments requiring GLP-compliant documentation and routine QC/QA validation, the GA-8 delivers consistent performance across diverse material classes—from fragile pharmaceutical actives to abrasive mineral powders—within a fully enclosed, dust-controlled chamber.
Key Features
- Acoustic energy-driven sieving: 3600 sonic pulses per minute generated by a precision audio transducer, eliminating mechanical wear and enabling gentle yet effective dispersion of cohesive powders.
- Seven-tier sieve capacity: Accommodates up to seven full-height 8-inch (203 mm) diameter test sieves simultaneously—compatible with ASTM E11 woven wire cloth (No. 4–No. 635; 4.75 mm–20 µm) and ASTM E161 electroformed mesh (150–5 µm, ±2 µm tolerance).
- Fully programmable operation: Ten user-defined methods stored in non-volatile memory, each specifying amplitude (% of max output), ramp profile (linear ascent/descent), tap mode (horizontal/vertical), tap frequency/intensity, and total test duration (0.1–99.9 min).
- Dual-axis tapping system: Four vertically oriented tappers (configurable as two or four active units) and one horizontally adjustable tapper—both independently timed and intensity-controlled to optimize fines liberation near cut points.
- Sealed, ergonomic enclosure: Powder-coated steel housing with vertically hinged Lexan® door ensures OSHA-compliant containment of respirable dust; integrated top/bottom elastomeric diaphragms seal the stack during operation.
- Modular accessories ecosystem: Includes GA-10 ultrasonic adapter for ISO 200 mm sieves, GA-15 dual-diaphragm seals, GA-16 dual-height acrylic spacers, SSA-108 silicone gasket sets, and GA-5 stack assembly kits—all traceable and replaceable per ISO/IEC 17025 calibration requirements.
Sample Compatibility & Compliance
The GA-8 is validated for dry-sieving applications involving organic and inorganic powders with bulk densities ranging from 0.2–3.5 g/cm³ and median particle sizes between 5 µm and 4.75 mm. It supports regulatory workflows under USP , FDA 21 CFR Part 11 (when paired with compliant LIMS or Gilson’s optional audit-trail software module), and ISO/IEC 17025-accredited laboratories. All sieve frames meet dimensional tolerances specified in ASTM E11 Annex A1 and ISO 565 Table 1. Electroformed meshes are certified to ASTM E161 Class A tolerances. The instrument’s closed-loop amplitude control and programmable ramping ensure method transferability across instruments and sites—critical for multi-lab studies and supplier qualification programs.
Software & Data Management
While the GA-8 operates via an intuitive front-panel interface with LED status indicators and tactile membrane keys, it supports external data capture via RS-232 or USB-to-serial interface (optional). When integrated with Gilson’s GilData™ Suite (v4.2+), users gain automated method export/import, electronic signature-enabled run logs, PDF report generation with embedded sieve calibration certificates, and full 21 CFR Part 11 audit trails—including user login history, parameter change timestamps, and electronic signatures for method approval. All stored methods retain metadata including date/time stamp, operator ID, and environmental conditions (if linked to optional temperature/humidity sensor input).
Applications
- Pharmaceutical: API particle sizing per USP , excipient blend uniformity assessment, and inhalation powder aerodynamic characterization support.
- Materials Science: Characterization of nanocellulose, metal oxides, battery cathode precursors, and ceramic slurries prior to sintering.
- Food & Agriculture: Flour granulation profiling, spice particle homogeneity testing, and feed pellet fines analysis.
- Geotechnical & Mining: Soil gradation per ASTM D6913, coal ash fineness evaluation, and cement clinker residue classification.
- Quality Control Labs: Routine batch release testing where sieve analysis forms part of specification limits (e.g., % passing 75 µm in ASTM C618 fly ash).
FAQ
What sieve standards does the GA-8 support natively?
The GA-8 accepts ASTM E11 woven-wire test sieves (No. 4–No. 635) and ASTM E161 electroformed mesh (5–150 µm) without adapters. ISO 565 and ISO 3310-1 sieves require the GA-10 ultrasonic adapter kit for 200 mm frames.
Can the GA-8 be used for wet sieving?
No—the GA-8 is strictly a dry-sieving instrument. Its acoustic energy delivery mechanism and sealed diaphragm stack are not designed for liquid media or slurry handling.
Is calibration traceable to NIST standards?
Yes. All factory calibration procedures for amplitude linearity, timer accuracy, and tap force consistency are performed using NIST-traceable instrumentation and documented per ISO/IEC 17025 requirements.
How often should maintenance be performed?
Recommended preventive maintenance includes quarterly inspection of diaphragm integrity, annual verification of transducer output amplitude, and biannual cleaning of air-path channels—detailed in the GilSonic Maintenance Logbook (PN GA-MLOG-2024).
Does the GA-8 meet explosion-proof requirements for hazardous environments?
The standard GA-8 is not rated for Class I, Division 1 environments. For ATEX or IECEx compliance, contact Gilson Engineering for custom intrinsically safe configurations (lead time applies).
