Plastic cases do not provide a shield against EMI and RFI in the same way that metal ones do, but of course have many other advantages.

 

We metal spray the internal surfaces of your box with a nickel loaded paint, masking up areas as necessary, to reduce or eliminate EMI and RFI.

 

Where this is not sufficient, either a silver, or copper/silver coating can be applied.

 

This metal coating will act to suppress emissions, to prevent interference, and will allow earthing to avoid electrostatic build up.

 

Whilst improved shielding is measured in decibels of attenuation, there is a relationship between attenuation and surface conductivity of the paint surface. The greater the conductivity, the better the shielding.

 

As regards compliance with EC standards it is the product manufacturer's responsibility to ensure it fully complies with all relevant EC directives.

 

This may sound very unscientific, but as is the norm with all current law of this kind, the emphasis is on putting the onus on the producer, self policing, and the threat of court action for non adherance.