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RFID is used to uniquely identify items; so, when a tag is assigned to an asset, person, or item, each tag ID should be unique. For example, if two identical red cars are on a lot (i.e. only the VINs are different), each must have a tag with unique EPC numbers so they be differentiated from one another.
Active RFID tags have a transmitter and their own power source (typically a battery). The power source is used to run the microchip’s circuitry and to broadcast a signal to a reader (the way a cell phone transmits signals to a base station). Passive tags have no battery.
Can you have two unique identifiers on a RFID tag?
That said, the codes are pretty long, so chances are slim that you’ll have two colliding codes. In the (near?) future RFIDs are going to replace bar codes in logistics. Those will have a combination of a non-unique product code, like EPC (European Product Code) and a unique ID.
What does it mean to have a passive RFID tag?
“Passive RFID tag” means a tag that reflects energy from the reader/interrogator or that receives and temporarily stores a small amount of energy from the reader/interrogator signal in order to generate the tag response. The only acceptable tags are EPC Class 1 passive RFID tags that meet the EPCglobal™ Class 1 Generation 2 standard.
What does 252.211-7006 passive radio frequency identification?
252.211-7006 Passive Radio Frequency Identification. As prescribed in 211.275-3 , use the following clause: (a) Definitions. As used in this clause—
Unlike active tags, passive RFID tags don’t contain power sources on IC. It depends on the interrogator for a power source. The radio waves emitted by interrogators are the source of power for passive tags. As these tags don’t have their power source, they are limited in terms of functionalities.