80 mesh denotes 80 wires per inch in each direction. For pc case magnetic dust filter the governing document is Fan sizes per ATX / 120 mm form factor; the specification row, aperture-micron conversion and selection guidance for this count follow.
80 Mesh Specification Row (Fan sizes per ATX / 120 mm form factor)
| Mesh count | Wire diameter (mm) | Aperture (mm) | Micron rating (u00b5m) | Open area (%) | Material |
|---|---|---|---|---|---|
| 80-Mesh | 0.140 | 0.177 | 178 | 31.3 | SS304, magnetic frame |
80 Mesh to Micron & Aperture
| Openings per inch | 80 |
|---|---|
| Aperture (opening width) | 0.18 mm |
| Micron rating | 178 µm |
| Standard wire diameter | 0.14 mm |
| Open area | 31.2 % |
Aperture = (25.4 mm ÷ mesh count) − wire diameter. The micron rating equals the aperture in micrometres; actual retention also depends on particle shape and cake formation.
Wire Diameter Options at 80 Mesh
| Option | Wire dia | Aperture | Micron | Open area | Weight (SS) |
|---|---|---|---|---|---|
| Heavy wire | 0.182 mm | 0.136 mm | 136 µm | 18.2 % | 1.36 kg/m² |
| Standard wire | 0.140 mm | 0.178 mm | 178 µm | 31.3 % | 0.81 kg/m² |
| Fine wire | 0.105 mm | 0.213 mm | 213 µm | 44.8 % | 0.45 kg/m² |
Heavier wire adds strength and abrasion life but closes the aperture; finer wire opens the aperture and raises throughput at the cost of durability. Specify mesh count AND wire diameter to fix the aperture unambiguously.
Open Area & Flow at 80 Mesh
The standard 80 mesh weave presents an open area of about 31.2%. At this count the mesh presents little flow resistance; selection is normally driven by particle retention and mechanical strength rather than pressure drop.
80 Mesh Cloth Weight
Standard 80 mesh stainless cloth weighs approximately 0.81 kg/m² (density 7.93 g/cm³ basis; brass and copper weave roughly 10% heavier, aluminum about one third). Use this figure for roll handling and freight estimation.
Typical Applications for 80 Mesh PC Case Magnetic Dust Filter
80 mesh pc case magnetic dust filter is commonly specified for general straining and sieving, paint and coating filtration, grease filters, insect screening, grain cleaning and pre-filtration ahead of fine media.
Plain, Twill or Dutch Weave at This Rating?
Plain square weave is the standard at this count: every opening is a true square of the stated aperture, retention is absolute for hard spherical particles, and the cloth is easy to clean.
When to Step Up or Down from 80 Mesh
Move to 100 mesh when particles are passing that must be retained; drop back to 60 mesh when the element blinds too quickly or the pressure drop is excessive. In a multi-layer pack, pair this count with a coarser support mesh downstream to carry the pressure load.
What PC Case Magnetic Dust Filter Does
Catching dust at the fan intakes of desktop PCs and industrial computers with a stiff stainless mesh held on by a magnetic frame.
Fitting & Care
- Mount filters only on intakes so the case runs at slightly positive pressure and dust enters through filtered openings.
- Remove and rinse or vacuum filters monthly; dry fully before refitting.
