I would like to test various passive RFID tags, and I need an inexpensive encoder. Can I use any encoder, or will certain models work only with specific tags? Are there sources for refurbished encoders?
—Name withheld
———
RFID tags and readers/encoders employ specific air-interface protocols (essentially, the language the two use to communicate). There are a variety of international standards for air-interface protocols. Some are for high-frequency (HF) tags and readers/encoders, some cover ultrahigh-frequency (UHF) and some are for active RFID systems.
If you have tags and interrogators that operate at the same frequency and utilize the same air-interface protocol, they will be able to communicate, regardless of the manufacturer. However, you cannot pick up a UHF reader and expect to read HF tags, or use an ISO 15693 HF reader to interrogate ISO 14443 HF tags.
Fixed UHF readers/encoders can be purchased for $800 and up, while handheld UHF models are more expensive. HF interrogators are usually a little cheaper. I am unaware of any place where you can purchase refurbished units—but perhaps our readers might know of one and can post that information below.
—Mark Roberti, Editor, RFID Journal
Previous Post What Are the Challenges of Popularizing RFID in the Indian Auto Industry? »