NEXOPART Grain and Tobacco Test Sieves (Formerly Haver & Boecker)

Overview

NEXOPART Grain and Tobacco Test Sieves are precision-engineered laboratory sieving tools designed for standardized particle size distribution analysis of agricultural bulk materials—specifically cereal grains, oilseeds, milled grain products, and processed tobacco leaf or cut filler. These sieves conform to the mechanical and metrological requirements defined in ISO 5223:2021 (“Cereals and cereal products — Determination of particle size distribution — Sieving method”) and align with ASTM D6913/D6913M for soil and aggregate sieving where applicable. Each sieve features a rigid, corrosion-resistant stainless steel frame and a tensioned woven wire mesh calibrated to certified aperture tolerances, ensuring repeatable, traceable separation performance across routine QC and regulatory-compliant testing environments.

Key Features

• Compliance-certified mesh apertures per ISO 5223 Annex A and ISO 3310-1:2016 specifications for nominal openings ranging from 125 µm to 8.0 mm, optimized for grain grading and tobacco cut-width classification.
• Electropolished 316 stainless steel frames with laser-etched model identification, batch number, and nominal aperture size for full traceability and audit readiness.
• High-tension mesh mounting system prevents sagging or distortion under mechanical agitation (e.g., Ro-Tap®, Eberbach, or Endecotts shakers), maintaining consistent open-area ratio over extended service life.
• Interchangeable design compatible with standard 200 mm and 203 mm diameter sieve stack configurations used in regulated grain inspection laboratories and tobacco quality control departments.
• Optional calibration certificate available upon request, traceable to national metrology institutes (e.g., PTB Germany) and compliant with ISO/IEC 17025:2017 requirements for accredited calibration laboratories.

Sample Compatibility & Compliance

These test sieves are validated for dry-sieving applications involving free-flowing, non-cohesive particulates with low moisture content (<14% w/w). They are routinely employed in official grain grading protocols mandated by the European Union’s Commission Implementing Regulation (EU) 2017/1980 and the U.S. Grain Standards Act. For tobacco, they support ISO 12152:2014 (“Tobacco and tobacco products — Determination of particle size distribution of cut tobacco — Sieve analysis”) and internal manufacturing specifications for cigarette filler uniformity. All units meet CE marking requirements for laboratory equipment and are constructed in accordance with EN 15271:2007 (safety requirements for sieving equipment).

Software & Data Management

While the sieves themselves are passive mechanical components, their use is integral to GLP- and GMP-aligned workflows. When integrated into automated sieving systems (e.g., Retsch AS 200, Fritsch Analysette 3), raw mass-on-size data can be exported via RS-232 or USB to LIMS platforms supporting 21 CFR Part 11–compliant electronic records. NEXOPART provides documentation packages—including Certificate of Conformance, Material Test Reports (MTRs), and ISO 17025 calibration reports—that support audit trails required under FDA, EFSA, and EU MDR frameworks.

Applications

• Official grain inspection for compliance with Codex Alimentarius standards and national trade specifications (e.g., USDA FGIS, UK Trading Standards).
• Quality assurance of malted barley, wheat flour, corn grits, and rice fractions in milling and brewing industries.
• Tobacco processing control: evaluation of cut-width distribution, stem content, and dust generation during flue-curing and re-drying operations.
• Research applications in post-harvest physiology, storage stability studies, and formulation development for extruded animal feeds.
• Reference material certification and inter-laboratory comparison programs organized under ILAC MRA signatory bodies.

FAQ

Are these sieves supplied with calibration certificates?
Yes—certificates traceable to PTB or UKAS-accredited labs are available as an optional add-on; standard units include a Certificate of Conformance.
Can these sieves be used on Ro-Tap® shakers?
Yes—they conform to ASTM E11 and ISO 3310-1 dimensional tolerances for 200 mm/8-inch diameter stacks and are compatible with all major mechanical and sonic sieving devices.
What is the recommended cleaning protocol?
Ultrasonic cleaning in neutral pH detergent followed by deionized water rinse and air drying; avoid abrasive brushes or chloride-based solvents to preserve mesh integrity.
Do you offer custom aperture sizes outside ISO 5223?
Yes—custom mesh configurations (including intermediate sizes and rectangular openings) can be manufactured upon technical specification submission and subject to minimum order quantities.
Is technical support available for method validation?
Yes—NEXOPART provides application notes, SOP templates aligned with ISO 5223 and ISO 12152, and remote consultation for method transfer and equipment qualification (IQ/OQ).