Shielding Effectiveness Frequently Asked Questions

Shielding effectiveness ensures that sensitive equipment remains protected from external interference and that internal systems do not emit signals that could disrupt other components.

Request a shielding effectiveness testing quote and to find out about our comprehensive testing capabilities.

What is Shielding Effectiveness and why does it matter?​

Shielding Effectiveness measures how well a material can block electromagnetic energy (radio waves, signals, etc.). It is important in industries like military and aerospace, industrial, automotive, and electronics to prevent unwanted interference, protect sensitive equipment/information, and meet regulatory standards. ​

What kind of materials can be tested?​

We can test nearly any solid materials intended for electromagnetic shielding, including metals, conductive fabrics, composite panels, compressible foams and gaskets to name a few.

If your material is flexible, rigid or layered we can typically accommodate it with a custom fixture or adapter plate. ​

What size do my samples need to be?​

Our ideal sample size is 24in x 24in with a flat 2in border around the edges to ensure a good seal.

Smaller samples can be tested using adapter plates but may limit the lower frequency range. ​

What can I do with the test results?​

The results will show how much electromagnetic signal your material blocks at frequencies between 10kHz-40GHz.

These values can be used to verify product performance, compare materials, support design decisions, and meet industry compliance or certification requirements.

How long does the testing process typically take?​

Standard tests are typically completed within 1-3 business days depending on the total number of samples tested and other variables like custom test fixturing, unique test requirements, etc.

If a faster turnaround is needed, we offer expedited scheduling and testing upon request. ​

Will my samples be damaged during testing?​

Our test method is non-destructive. The sample is clamped between two conductive surfaces using compressible gaskets to ensure a clean seal without drilling, cutting or any other permanent modification.

All samples are returned as delivered once testing is completed. ​

What if my material has an irregular shape or holes/openings?​

We can often test non-standard shapes using custom adapter plates or filler panels. ​

How do the test results compare to the various industry standards?​

The values obtained can be compared a wide range of industry standards such as MIL-STD-285, IEEE 299-2006, MIL-STD-188-125-1/2, etc.

Expert Shielding Effectiveness Compliance Testing

​In choosing Keystone Compliance for your shielding effectiveness needs, you benefit from quick turnarounds, precise results, and globally recognized testing reports. Additionally, our professional engineers provide constant communication throughout the entire testing process.

Ready to get started? We are. Request a quote to see why hundreds of manufacturers trust Keystone each year with their shielding effectiveness laboratory testing needs.

​