LABALPHA Test Sieve 4 in. Diameter Size 600 Mesh Lot of 2 Sieves

LABALPHA 4-Inch Precision Analytical Test Sieves, 600 Mesh / ~20–25 µm Aperture (Lot of 2 Sieves). A dual-sieve set of precision-woven stainless steel analytical test sieves engineered for high-accuracy micro-particle separation, quality control powder classification, and fine particulate analysis in laboratory and industrial settings.

Used; excellent condition.

• Manufacturer & Line: LABALPHA / Precision Laboratory Analytical Test Sieves Series
• Quantity & Set Configuration: Lot of 2 identical ultra-fine test sieves
• Mesh Designation & Aperture Rating: 600 Mesh (nominal aperture cutoff of ~20 µm to 25 µm / 0.020–0.025 mm) engineered for sub-sieve micro-fractionation
• Frame Dimensions: 4.0-inch (approx. 100 mm / 10 cm) outer diameter with standard half-height profile (approx. 4.5 cm / 1.77" total frame depth), providing an optimized internal volume that minimizes dead space and sample hold-up
• Metallurgy & Material Construction: Fully fabricated from premium AISI 304 stainless steel, including both the seamless spun double-wall frame and the precision wire cloth screen, ensuring superior corrosion resistance, high tensile strength, and wide thermal tolerance
• Mesh Weave & Aperture Uniformity: Precision twill dutch / square micro-woven wire cloth calibrated to deliver consistent pore geometry across the entire working surface, preventing particle bypass and ensuring reproducible gradation curves
• Frame Design: Double-layer deep-drawn nesting frame with polished interior transitions and flush-fit screen tensioning to eliminate crevice retention and facilitate complete particulate recovery
• Stacking & Interfacing: Features standard interlocking skirts designed for modular nesting with compatible 4-inch receiving pans, top collection covers, and compact electromagnetic or vibratory sieve shakers
• Decontamination & Cleaning: Autoclavable and compatible with organic solvents; suitable for gentle immersion ultrasonic bath cleaning to effectively clear near-aperture blinding without damaging micro-wire strands
• Primary Application: Ultra-fine chemical powder sizing, additive manufacturing metal powder gradation, abrasive and polishing compound analysis, pigment and toner QA/QC, geological clay/colloid fractionation, and pharmaceutical excipient classification