EMI/RFI shielding windows

Swelex offers electrically conductive windows that protect buildings and electronics
from interfering signals that could disrupt the technology or create safety risks. 

Please contact us if you want to know more about our offer.

How to choose the right EMC window for electronics

If you need to protect electronics, rooms or buildings from interfering signals but still want to be able to see in or out, investing in shielded EMI windows, or EMC windows, is a good solution. These windows have a fine mesh or special conductive film that blocks electromagnetic interference (EMI) and radio frequency interference (RFI), while allowing light to pass through and providing good visibility.

There are different types of screened windows

One type is one with a fine mesh, in copper that is blackened or stainless steel that is silver plated, which is either laminated between two sheets of glass, polycarbonate or it is moulded into plastic substrates. The mesh is then terminated to a silver frame around the entire window to make electrical contact with the application. 

The second type is an electrically conductive window film, which is a thin, almost invisible coating applied to the glass to create a protective layer against interference. The most common type is ITO (Indium Tin Oxide), which provides very good visibility through the window while blocking unwanted signals.

The type with a fine-mesh net screens best.

Which type should I choose?

Size:
Shielded EMI windows come in everything from small sizes for displays, inspection panels and electronic cabinets to large windows for buildings. Choose the size according to where you need the protection - for example, for a server room, a control room or a regular window in the house.

Materials and coatings:
Depending on shading requirements, transparency and environment etc. there are different options. A screened window with a fine mesh screens better than one with ITO coating. While the screened window with ITO coating has better transparency. Then you can choose between different materials such as polycarbonate, glass or plastic substrates, like acrylic. There are pros and cons between the different options.

Field of application:

• For electronic cabinets and appliances: Choose smaller EMC windows that fit in doors or panels.
• For rooms or buildings: Choose larger screened windows or conductive window film that can be fitted directly to existing glass panes.

Advantages of screened windows or conductive window film

• Protects sensitive electronics and equipment from interference
• Provides light and good visibility
• Available in many sizes - fits both small appliances and large windows
• Easy to install - can often be fitted to existing windows