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RFID Tag Selection Help

Technical standards set by EPCglobal enable RFID tags to be grouped according to minimum capabilities. Each class adds to features of the basic class 1 tag, which is “passive”: it depends on a reader to initiate communication and supply power. Passive tags can be read from as far away as 30 feet, active tags from 300 feet or more.

 

 

Minimum Function

Some uses

Class I
(Passive)

Unique identifier number

"Kill function" to disable tag

Memory programmable only once

Newer "Gen 2" versions may be rewritable and password-protected

Parts and inventory

Enhanced U.S. driver's license

Key card

Class II
(Passive)

Extended ID number

Additional memory, rewritable

Password access

E-passport

Credit card

National IDs

Class III
(Semi-passive)

One or more sensors and a power source

Container and storage sensors

Class IV
(Active)

Transmitter and power source

Can initiate communication with a reader or another tag

Car key fob

Animal tag

Toll pass