Is there an RFID tag available that can be interrogated through metal roofing systems, and that would work for 20 years?
—Name withheld
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To my knowledge, there is no such system. Radio waves bounce off metal, though there might be a way to accomplish what you hope to achieve without having to read through the metal. You’d have to describe what you are trying to identify, however, and why. Perhaps I can then suggest an alternative approach.
—Mark Roberti
