RFI Shielding Wire Mesh - Technical Information

Copper meshes: EMI-RFI shielding for electronic enclosures (from small Faraday cages, to rooms, to complete buildings) can be achieved using woven copper mesh. These meshes are woven from commercially pure copper per ASTM B-152. Weave quality guaranteed to meet or exceed ANSI/AWCI-01-1992.

Stainless steel: optically clear, high transparency meshes, listed in this section, are used in the manufacture of shielded windows for viewing instrumentation inside a shielded enclosure. They are also used for covering computer display screens to prevent the emanation of unwanted electrical emissions.

These meshes are produced using highly sophisticated wire drawing and weaving technologies. Stainless steel T304 rod is drawn to an extremely smooth close tolerance wire many times finer than a single strand of human hair. A computer-controlled loom weaves this into the world's most delicate metal fabric.

The result is a highly transparent, uniform mesh. It is used in shielded windows and cathode ray tubes (CRT's). Our mesh qualifies as "optical grade". It requires great care in handling. This material is woven to ISO 9044.

These "optical grade" precision stainless steel meshes are used for manufacturing shielded CRT screens and transparent radio frequency (RFI) shielded windows and in TEMPEST HERF EMI EMP mesh applications

Closeouts, overstocks, and discount RFI Shielding copper wire mesh may be available.

RFI Shielding Wire Mesh - Uses

• Faraday cages
• Metal detectors
• EMI shielding
• RFI shielding
• Shielded rooms
• Tempest shielding
• Shielding satellite antennas from terrestrial interference (TI)
• Cable wrapping and display shielding

RFI Shielding Wire Mesh - Installation

Although we are not application engineers, we have the following examples of how some of our customers have installed the copper mesh in some shielded enclosures and rooms. The flexible wire mesh is installed on all four walls, the ceiling and floor with each mesh panel overlapping the next by three inches.

The mesh is fastened securely on 12-inch centers with staples and adhesive or casein glue. Each of the four corners has a strap that leads to an earthen ground. These grounding straps are formed by folding a 9-inch wide length of mesh into a three-inch strip.

One end of strap is attached to the mesh in the room corners, mechanically or with solder, and the other ends are attached to ground by a licensed electrician. The mesh is often covered with sheet rock to protect it.

TWP INC is only a wire mesh supplier and fabricator. We have no RFI engineers in our staff, but we suggest that you consult an RFI/EMI expert.

RFI Shielding Wire Mesh - Cutting

Our copper RFI meshes (like 16 mesh, 22 mesh, and 100 mesh) are easily cut with scissors and the material presents no special handling difficulties.

High transparency (optical shielding stainless steel meshes like 50mesh, 80 mesh and 100 mesh) are extremely delicate with fine wires with relatively large openings. This makes it difficult to handle and cut to size or shape and can result in wrinkles and distortions. We have had some success in minimizing cutting difficulties by taping these optical stainless steel meshes to a paper backing and cutting through the paper and mesh simultaneously.

A common scissor can be used to cut these meshes.

RFI Shielding Wire Mesh - Samples

TWP Inc. will provide samples for your testing and inspection. RFI shielding mesh sample size is 3 inch x 3 inch. Credit cards only please.

The cost is $8 per sample ordered (plus UPS Charges about $3.00 total for up to 10 samples by UPS ground - USA).

For the quickest service, please order your samples on-line.

RFI shielding wire mesh uses | Cutting instructions | Choosing a RFI shielding mesh based on its look and feel | RFI shielding wire mesh installation | RFI shielding wire mesh samples