Shielding · EMP, RF and MRI
Specialist shielding
EMP shielding, RF shielded rooms and MRI suites for UK sites: shielded rooms, filtered entries and on-site verification, supplied and installed.
- ✓Third-party test evidence with every product
- ✓Written specification you can issue to tender
- ✓Supplied and installed across the UK
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Explore specialist shielding
Attack, blast and gas protection
Attack, blast and gas protection: gas-tight doors and blast valves for protected spaces, designed, installed and fully tested across the… View details →
Electromagnetic and RF shielding
Electromagnetic and RF shielded rooms built as Faraday cages and specified by attenuation in dB, designed, installed and tested across… View details →
EMP shielding
EMP shielding for critical electronics: shielded rooms with filtered power and signal entries, designed, installed and tested across the UK. View details →
MRI shielded rooms
MRI shielded rooms with RF cages, shielded doors and windows for hospitals and imaging centres, designed, installed and tested across… View details →
Sound masking
Sound masking for secure rooms: tuned background sound that protects speech privacy in boardrooms and briefing rooms, installed across the… View details →
Testing and surveys
Shielding testing and surveys: attenuation tests and site surveys for new and existing shielded rooms, with independent test reports across… View details →
Shielding controls electromagnetic energy: keeping signals in, and keeping interference and pulses out. ArxBridge supplies and installs EMP shielding, RF shielded rooms and MRI suites for UK sites. The right product follows the threat: EMP needs filtered entries as well as the shield, MRI needs RF and often magnetic shielding, and secure rooms need proven attenuation.
- EMP, RF and MRIThree shielding disciplines
- dB attenuationHow RF shielding is specified
- Filtered entriesPower and signal lines sealed
- Tested on completionSurveys verify performance
How shielding is specified
RF shielded rooms, or Faraday cages, are specified by attenuation in dB over a frequency range: how much signal the room blocks, and at which frequencies. Name the bands you care about before the design starts, because a room that performs well at one frequency may not at another.
MRI rooms need RF shielding and often magnetic shielding as well, and the two are different things. The RF cage protects image quality from outside interference; magnetic shielding manages the magnetic field of the scanner. EMP protection adds a further demand: filtered power and signal entries, so a pulse cannot enter on a cable and bypass the shield.
One rule runs through every discipline: a shield is only as good as its weakest penetration. Doors, ventilation, power and data entries all need shielded treatment, planned at design stage.
Every penetration is a leak. Doors, ventilation, power and data entries all need shielded treatment. Plan them at design stage, not after the room is built.
Choosing the right shielding product
Each product below covers a different shielding need. Start with the discipline that matches your room, then look at testing to prove the result.
| Product | What it does | Suits |
|---|---|---|
| EMP shielding | Electromagnetic pulse protection | Critical infrastructure and defence sites |
| Electromagnetic and RF shielding | Shielded rooms and Faraday cages | Test labs and secure communications rooms |
| MRI shielded rooms | RF cages for MRI suites | Hospitals and imaging centres |
| Attack, blast and gas protection | Gas-tight doors and blast valves | Protected spaces and shelters |
| Sound masking | Eavesdropping protection for secure rooms | Boardrooms and briefing rooms |
| Testing and surveys | Shielding tests and verification | Any shielded room, new or existing |
Who specifies shielding
Security consultants specify shielded rooms for government and defence work, often alongside a security consultancy review of the wider site. Hospital estates teams specify MRI suites with their imaging planners. Laboratory and data centre managers specify RF rooms for test and communications use. Our standards hub explains the rating systems used across our product groups.
Typical sites needing shielding include government and defence, healthcare and data centres, each with different frequencies, threats and room uses.
Shielding FAQs
What is the difference between RF shielding and magnetic shielding?
RF shielding blocks radio frequency signals; magnetic shielding deals with static and low frequency magnetic fields. They use different materials and different designs. MRI rooms often need both, which is why the two are specified separately.
Can EMP shielding be added to an existing building?
Yes. A room can be lined to form a shielded envelope, with filtered entries for power and signals. A survey of the existing construction, services and penetrations comes first, because every cable and pipe is a potential leak.
How is shielding performance proven?
By test. Testing and surveys measure the room’s attenuation across the specified frequency range after installation, and the written report forms part of the project file.
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