Test Sieves: Mesh, Micron, ASTM & ISO Selection Guide
Labtek Enterprises manufactures and supplies laboratory Test Sieves for accurate particle size analysis, material grading and quality-control applications. Laboratory sieves are commonly used in aggregate, soil, cement, construction-material, powder and general laboratory testing.
The correct sieve should be selected according to the required aperture opening, frame diameter, sieve material and applicable test method. For mechanical sieve analysis, laboratories can use compatible Test Sieves with our Sieve Shaker for particle size analysis.
ASTM E11, ISO 3310 & Test Sieve Materials
Test Sieves may be selected with reference to standards such as ASTM E11 and ISO 3310, depending on the laboratory procedure and customer requirement. These standards are commonly associated with specified sieve openings and woven-wire test sieves used for particle-size analysis.
Brass Test Sieves are widely used for routine laboratory applications, while stainless-steel Test Sieves may be preferred where durability, corrosion resistance or specific laboratory conditions are important.
For a commonly used laboratory configuration, see our 8 Inch Brass Test Sieve.
Common Test Sieve Mesh & Micron Reference
Test sieve sizes are often described using a sieve number, aperture opening in millimetres or a micron value. The actual aperture opening should be used as the primary reference when selecting a sieve for a defined laboratory test method.
| Sieve No. |
Opening |
Micron |
| No. 4 | 4.75 mm | 4750 µm |
| No. 8 | 2.36 mm | 2360 µm |
| No. 20 | 850 µm | 850 µm |
| No. 40 | 425 µm | 425 µm |
| No. 100 | 150 µm | 150 µm |
| No. 200 | 75 µm | 75 µm |
Note: Mesh-number terminology can vary between sieve standards, so the required aperture and applicable test procedure should be confirmed before ordering.
For sieve analysis, multiple sieves with progressively smaller openings can be stacked to determine particle-size distribution. If you need help selecting a mesh, micron size, aperture, sieve material or testing standard, contact Labtek Enterprises.