RFID Journal Staff asked 10 years ago I am looking for a tag that has such a read range, even without line-of-sight between a reader and a tag, guaranteed.
—Name withheld
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Most passive ultrahigh-frequency (UHF) RFID transponders have a read range of roughly 25 to 30 feet (7.6 to 9.1 meters) in free air, though there are tags with larger antennas that can achieve longer read ranges. I've seen Omni-ID's Ultra tag being read at close to 90 feet (27.4 meters). The right tag to use will depend on the size of the object you are tagging, the material of that object, cost and other factors, not just whether it can read be from 15 meters away. So it would be difficult to recommend one or two specific tags without knowing more about what you are trying to identify and track.
I am also unsure what kind of tag guarantee are you looking for. If you want to guarantee that the tags will not fail, most companies do not offer such a guarantee, but tags rarely stop working unless they are physically damaged, and it is easy to find tags that can be protected from heat, cold, moisture and blunt force. If you are looking for a guarantee that the tags will be read every time, this is difficult to guarantee as well, as tag-reading depends on many factors, such as the environment, the interrogator used and so forth. That said, I am confident there is a tag available to meet your needs.
—Mark Roberti, Founder and Editor, RFID Journal
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