This page covers the 100 mesh count of emi / rfi shielding mesh: the woven specification per MIL-DTL-83528 / IEEE 299, the particle size it retains, the open area it presents to flow, and the neighbouring counts to step to when the separation requires it.
100 Mesh Specification Row (MIL-DTL-83528 / IEEE 299)
| Mesh count | Wire diameter (mm) | Aperture (mm) | Open area (%) | Material | Shielding @ 1 GHz (dB) |
|---|---|---|---|---|---|
| 100-Mesh | 0.110 | 0.144 | 32 | Phosphor bronze | 75 |
100 Mesh to Micron & Aperture
| Openings per inch | 100 |
|---|---|
| Aperture (opening width) | 0.154 mm |
| Micron rating | 154 µm |
| Standard wire diameter | 0.1 mm |
| Open area | 36.7 % |
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 100 Mesh
| Option | Wire dia | Aperture | Micron | Open area | Weight (SS) |
|---|---|---|---|---|---|
| Heavy wire | 0.130 mm | 0.124 mm | 124 µm | 23.8 % | 0.87 kg/m² |
| Standard wire | 0.100 mm | 0.154 mm | 154 µm | 36.8 % | 0.51 kg/m² |
| Fine wire | 0.075 mm | 0.179 mm | 179 µm | 49.7 % | 0.29 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 100 Mesh
The standard 100 mesh weave presents an open area of about 36.7%. A common design rule is to keep the clean-mesh approach velocity low enough that initial pressure drop is negligible; the mesh then acts as the cake support.
100 Mesh Cloth Weight
Standard 100 mesh stainless cloth weighs approximately 0.51 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 100 Mesh EMI / RFI Shielding Mesh
100 mesh emi / rfi shielding mesh is commonly specified for liquid filtration and clarification, extruder screen packs, hydraulic and fuel strainers, pharmaceutical and food sieving, and laboratory test work.
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.
What EMI / RFI Shielding Mesh Does
Attenuating electromagnetic and radio-frequency interference through vents, windows and enclosures while still passing air and light.
Fitting & Care
- Clamp the mesh edges under a conductive gasket or solder them continuously to the frame.
- Keep paint and anodizing off contact faces; mask them before finishing.
