Passive RFID tags have no power supply; they are activated by the electromagnetic wave emitted by the reader and then send the information back to the RFID reader. The practical range of passive RFID tags is about 10 cm to several meters.
Active RFID tags have a built-in power supply and a microprocessor for special tasks. The data transmission range of active RFID tags is much farther than that of passive tags; an active RFID reader can monitor all active tags within 100 meters.
What are the advantages of passive RFID tags?
If passive asset labeling technology is used, it can read four times faster than using barcode. Users only need to carry a passive RFID reader, even if the tag is not in the line of sight can be detected. Users still need to inspect the actual location of each labeled asset, and the data collection process will run automatically with a low error rate. Asiarifd.com sells various types of RFID tags.
What are the advantages of active RFID tags?
When an object is managed by an active RFID tag, the routine inventory of the object is almost unnecessary. Active RFID tracking scheme will automatically and real-time start asset inventory according to applicability, business and security requirements.
Readers can be permanently installed in key locations (e.g., offices, storage rooms, high traffic areas, exit corridors, etc.) to report on the current status of marked assets in designated areas.
Under what circumstances are these two RFID tags used?
Passive RFID tags are commonly used in retail supply chains to improve inventory tracking and management effectiveness. Passive RFID can be regarded as a kind of "enhanced barcode". (The longer the time used, the worse the quality of printed barcode will be, such as stain and tear, and the reader and barcode are required to be within the scope of vision.) The absence of built-in power means that individuals with passive labels can be fairly small and inexpensive; passive labels for commercial purposes can be nested on sticker labels for use. The bank card, bus card and access card used in our daily life are nested RFID tag cards, also known as IC cards.
Active RFID systems use "lighthouse" tags to regularly relay their status. These tags are transmitted in real time and the tagged assets are identified immediately and continuously. If real-time tracking is needed in a large range, the active RFID scheme is obviously superior to other passive solutions. Active technology has significant advantages in the management of important assets, IT equipment, valuables, mobile and shared resources.
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