Mesh vs Micron
Mesh Size and Microns
To start, mesh number, mesh size and micron size can be likened to the imperial system of measurement as it’s compared to the metric system. They measure similar things but have more to do with application or professional preference.
Since mesh number is the inverse of micron size, it can sometimes be confusing and difficult to remember what size it means. Simply put, if you were to view a list of multiple mesh numbers or multiple micron numbers, one way to know what they mean is to remember that:
- The larger the mesh number, the smaller the particle size it can filter
- The larger the micron number, the larger the particle size it can filter.
Mesh number is derived from the number of openings per linear inch; therefore, a 100-mesh screen has 100 openings per linear inch.
The sizes of mesh openings (mesh size) are approximate. This is because the sizes of the openings are affected by the diameter of the metal or plastic mesh strands. Because of this, mesh sizes frequently vary between manufacturers, even when they are using the same mesh number.
Since micron is a unit of measure (μm), a micron rating directly corresponds to the minimum particle size that can be filtered out. For example, 1 μm is equal to 1/1000 of millimeter or 1/25,000 of an inch. Since we’re able to convert millimeters to inches, micron size can be converted to mesh, and vice versa, if you know the strand diameter used in the mesh. For example, a 1.3-micron mesh size, using 37-micron diameter strands, uses 663 mesh or 663 strands per inch. For more information on this, check out our mesh and micron conversion chart and this online mesh calculator.
Still have questions? You can learn more in our blog post How to Choose an Inline Filter – Mesh and Particle Size or you can submit your question via our Contact Us page.