Mesh Count vs Micron: What’s the Difference in Wire Mesh Filtration?

        When customizing or sourcing industrial wire mesh, you may frequently hear engineers state: "We need 200-mesh stainless steel woven wire mesh." Conversely, supply chain representatives might ask:"What is your required filtration precision—specifically, the micron rating?"

        For many purchasing managers, the relationship between "Mesh Count" and "Microns" often feels like a riddle. Blindly equating the two frequently leads to the procurement of wire mesh that is either "too coarse to effectively trap impurities" or "too fine,resulting in severe clogging of fluid system and skyrocketing head pressure."

        This article will thoroughly demystify the fundamental differences between Mesh Count and Microns, providing a systematic selection guide designed to help you mitigate procurement risks and reduce operational costs.

        Ⅰ. What is Mesh Count in Wire Mesh?

        Mesh Count is a traditional industrial unit of measurement defined as the number of mesh openings per linear inch (25.4 mm).

        • Calculation Method: Starting from the center of any single wire strand, measure a distance of 1 inch in either a horizontal or vertical direction; the number of mesh openings contained within this length constitutes the mesh count of that screen.

        • Fundamental Principle:The higher the mesh count,the denser the mesh openings.For example,100 Mesh signifies 100 openings per inch,meaning its aperture size is evidently much smaller than that of 10 Mesh (10 openings per inch).

        • A Common Misconception:Mesh count alone does not fully determine filtration precision! This is because it overlooks a crucial variable—wire diameter. For instance, with a standard 100-mesh screen, if the stainless steel wires used are relatively thick, the mesh openings will be compressed and reduced in size; conversely, if the wires are thinner, the mesh openings will be larger.

        Ⅱ. What is Micron in Filtration?

        The micron (㎛) is an international standard unit of length. In the filtration industry, it represents the actual physical dimension of a mesh opening—specifically, the clear distance between the inner edges of two adjacent wires within a single mesh opening.

        • Physical Concept: 1 ㎛ = 0.001 mm. The pore size of high-precision filtration media (such as Titanium Wire Mesh or Pure Nickel Mesh) can often reach 20 microns or even smaller.

        • Key Application:The micron is an absolute metric for measuring the particle retention capability of a filtration system. If you need to filter out impurities of 50 microns, you should look for a wire mesh with a Micron Rating of ≤50 ㎛.

        

        Ⅲ. Quick Reference Table: Mesh to Micron Conversion Chart

        For your quick reference, the Engineering Department at Kewei Wire Mesh has compiled the following technical parameter comparison table for commonly used standard stainless steel woven wire mesh:

Mesh Count	Standard Wire Diameter	Opening Size	Micron Rating
10 Mesh	0.60 mm	0.076 in / 1.94 mm	1940 ㎛
20 Mesh	0.40 mm	0.034 in / 0.87 mm	870 ㎛
40 Mesh	0.25 mm	0.015 in / 0.39 mm	390 ㎛
60 Mesh	0.15 mm	0.011 in / 0.27 mm	270 ㎛
80 Mesh	0.12 mm	0.008 in / 0.20 mm	200 ㎛
100 Mesh	0.10 mm	0.006 in / 0.15 mm	154㎛
200 Mesh	0.05 mm	0.003 in / 0.08 mm	77 ㎛
325 Mesh	0.035 mm	0.0017 in / 0.043 mm	43 ㎛
400 Mesh	0.030 mm	0.0013 in / 0.033 mm	33 $㎛

        (Note: The above data is based on standard square woven mesh. For ultra-precise, specialized weave types—such as Dutch Weave stainless steel wire mesh—please contact Kewei to obtain custom-tailored drawings.)

        Ⅳ. FAQ: Solving Your Filtration Challenges

        Q:Can two wire meshes have the same Mesh Count but different Micron ratings?

        A:The micron rating (aperture size) is determined jointly by the mesh count and the wire diameter. This is why professional industrial buyers invariably pay close attention to both the mesh count and the wire diameter when requesting a quote.

        Q:Why does my high-mesh filter disc tear or blind during polymer extrusion?

        A:High-mesh wire cloth features extremely fine wire diameters, resulting in very low mechanical strength. Under high-pressure conditions, a single layer of high-mesh wire cloth is highly susceptible to deformation or being torn apart by high-viscosity melts. It is therefore recommended to utilize multi-layer filter discs or to opt for wire meshes with superior tensile strength, such as FeCrAl alloy wire mesh or titanium wire mesh.

        Q:What is the difference between Nominal Micron and Absolute Micron in wire mesh catalog?

        A:Nominal Micron refers to the filtration efficiency at which a wire mesh can intercept 60% to 90% of particles of a target size. Absolute Micron refers to the smallest size of rigid particles that the wire mesh can intercept with 100% efficiency. In demanding sectors such as aerospace and pharmaceuticals, it is imperative to request Absolute Micron certification from suppliers.

        Conclusion

        As a manufacturer with over 20 years of experience, Kewei Metal Mesh consistently insists on using high-purity raw materials and never misrepresents wire diameters or mesh counts.

        Contact Kewei's Engineering Experts Today.We'll design the optimized metal wire mesh filter disc or tube catalog for you.