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 3"-Diameter Sieve, Full Height Stainless Steel, No. 120 (125µ)
For use with Cole-Parmer sieve shaker (59986-01), sold separately. Order optional stainless steel cover (59988-03) and full-height receiving pan (59988-07), sold separately.
Bellco Glass, Inc. Cell Screen/150mesh 94
Prepare cell suspensions and gel extraction of proteins. The stainless steel screens are held in place by a retaining ring on the bottom of the pan that is tightened using the screen replacement key. The screens are available in different mesh sizes and have a diameter of 37mm. MADE IN THE USA. Specifications:Stainless Steel Size: 94Case Quantity: 5
Fritsch Milling And Sizing Inc Sieve Ring P-14 Premium Line 0.75 mm Trapezoidal Perf.
Sieve ring 0.75 mm trapezoidal perforation with reinforced edges made of stainless steel
Sieve rings determine the final fineness of the sample.
Sieve rings with reinforced edges and trapezoidal perforation are perfect for fast comminution of medium-hard to soft materials, the trapezoidal perforation provides additional shearing effects.
Additionally are sieve rings with reinforced edges with round perforation available which are perfect for brittle materials and medium fineness with narrow particle size range.
Sieve rings are also available in further perforations.
Chemglass Life Sciences Cell Screen, 20 Mesh, SST
Cell Screen, 20 Mesh, Stainless Steel . Component of the CLS-5020 Stainless Steel tissue grinder cel dissociation sieves. Pictured are the complete tissue grinders, but this item is cell screen only. 20 mesh is equivalent to 841 micron and 0.0331 inches.
Bellco Glass, Inc. Cell Screen/60mesh 230
Prepare cell suspensions and gel extraction of proteins. The stainless steel screens are held in place by a retaining ring on the bottom of the pan that is tightened using the screen replacement key. The screens are available in different mesh sizes and have a diameter of 37mm. MADE IN THE USA. Specifications:Stainless Steel Size: 230Case Quantity: 5
