What is an RFID tag? Increasingly, RFID tagging is used in supply chain management as an alternative to bar code technology.
RFID tags that contain their own power source are known as active tags. Those without a power source are known as passive tags. A passive tag is briefly activated by the radio frequency ( RF ) scan of the reader. The electrical current is small — generally just enough for transmission of an ID number. Active tags have more memory and can be read at greater ranges.
Available in different frequencies with passive or active (battery powered) options, RFID tags are placed on what needs to be tracked. Tags are available in different sizes and material, are reusable or used only one time, and can even be embedded inside materials for monitoring movement, vibration, or temperature. Although more expensive to use than the bar code stickers, RFID tags don’t get dirty or fall off or require an unobstructed line-of-sight between the tag and the reader.