Using sheet steel in the construction of shielded rooms

LOW-LEVEL electronic or electrical measurements are particularly susceptible to errors introduced by external electromagnetic influences. In a laboratory, isolation from such interference usually is achieved by enclosing an area completely in copper or bronze screening. Certain instrumentation, however, requires a higher degree of isolation than can be achieved usually in screened enclosures. Copper sheet has been used ordinarily to construct enclosures to meet these requirements.