A list of companies that provide MIL-STD-461 Testing in Pennsylvania, United States. The MIL-STD-461 is the United States Military testing standard that deals with electromagnetic interference (EMI) by evaluating both the emissions produced by an electronic device and the device's vulnerability to external electromagnetic interference. EMC Directory is the largest directory of EMC Testing Companies on Internet. We have listed the leading EMC Testing companies from around the world and made them searchable by their location and capabilities.