Mechanical Sieves
Mesh device used to strain solids from liquids and manually separate particles by size; sieves can be constructed of metal or plastic. Products include sets, macro and micro sieve sizes, sifters and beads, etc.
What Is a Sieve?
Sieves are mesh strainers. They are typically round, with solid metal walls connected to a woven metal screen. They are often used with sieve receivers that collect the material that falls through the sieve. To prevent loss and contamination of the material, it can be protected by a sieve cover. Sieve covers are also necessary for covering the top sieve when multiple sieves are stacked on a laboratory shaker.
What Is Sieving?
Sieving is a technique for separating a sample into particles of different sizes. Sieving can be used to separate stones from sand and is used in the food industry to help eliminate contamination by foreign bodies.
Analysis by sieving may require a single sieve or a set of mesh sieves, arranged by decreasing size of the mesh openings. Air flow, liquid, vibration, or another mechanical method is used to move the sample particles through the screens.
Critical variables include sample size, agitation parameters, duration, and end point determination. Sample properties, like hygroscopic or electrostatic tendencies, can present analytical challenges, and some samples may need to be suspended in a liquid for accurate measurement.
Types of Sieves
Sieve frames and meshes may be stainless steel or brass. Common diameters are 3, 8, and 12 in. and 200 and 300mm; non-standard sieves may have other diameters, including 6, 10, and 18 in. Heights range from 1 to 9 in. and may be designated as full, intermediate, or half-height.
ASTM E-11 establishes criteria and tolerances for the openings in the woven wire mesh for standard sieve sizes. Some sieves are also traceable to NIST or must meet ISO 3310-1.
Cole-Parmer™ Testing Sieve, Brass
Serialized sieve with a test sieve certificate of compliance.
Bel-Art™ Additional Mesh Inserts
For use with Mini-Sieve™ micro sieve set.
RETSCH Stainless-Steel Test Sieves, 100 mm Dia., in Micrometer Pore Sizes with ISO 3310/1
For use with Vibratory Sieve Shaker AS 200 control
Endecotts™ Woven Wire Test Sieve, 200 mm O.D.
Stainless steel woven wire mesh test sieves are ideal for all types of laboratory sampling and particle size analysis
Biodesign™ Nylon CellMicroSieves Rolls
Autoclavable and can be repeatedly washed and reused
Saint Gobain Life Sciences Chemware™ PFA Sieves
Chemware™ PFA Sieves are resistant to most chemicals and are ideal for ultra-pure applications.
Biodesign™ Nylon CellMicroSieves Square Sheets
Autoclavable and can be repeatedly washed and reused
Biodesign™ Polypropylene Sieve Holders
For use with CellMicroSieves™
Buerkle™ Aluminum Sieve
Buerkle™ Aluminum Sieve for Buerkle™ Barrel Funnel.
Biodesign™ BioPrepNylon™ Matrix Filters
Many biological preparations begin with extractions that require coarse filtration to remove cellular debris. Bulk filtration using cheesecloth absorbs much of the extraction fluid, while membranes clog quickly. BioPrepNylon™ produces rapid bulk filtration at extraordinary flow rates.
Endecotts™ Stainless Steel Perforated Plate Sieve, 200mm
For use with all types of laboratory sampling and particle size analysis. Endecotts™ Stainless Steel Perforated Plate Sieve, 200mm includes round holes in a a Stainless Steel plate.
RETSCH Test Sieves - 13 Mesh or Less
Stainless steel with wire gauze