We are a U.K. company, and I wonder if you could help me identify vendors supplying interrogators with a range of 1 to 2 meters (3.3 to 6.6 feet).
Passive high-frequency (HF) RFID cards can be interrogated from 1 meter away, though the practical read range is often only about half that distance. To achieve a range of 2 meters, you would require a card with an embedded passive ultrahigh-frequency (UHF) transponder. Zebra Technologies offers these, and has a machine you can buy that will create them for you (see Zebra’s UHF Gen 2 RFID Card).
—Mark Roberti, Founder and Editor, RFID Journal
Are There Any RFID-based Padlock Solutions Available? »