RFID detection meters are not accurate enough for field mapping. Is there a light available that will react to RFID power and show the boundaries?
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The PowerMapper from ePix will give you the signal strength of a passive UHF field anywhere within that field, so you can map the boundaries of the read field. Keep in mind that the read field is not static and you might be able to read a tag on the edge of the field sometimes but not others, due to reflections and other factors.
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