This is an absolutely key part of the technology; RFID tags do not need to contain batteries, and can therefore remain usable for very long periods of time (maybe decades).
The scanning antennas can be permanently affixed to a surface; handheld antennas are also available. They can take whatever shape you need; for example, you could build them into a door frame to accept data from persons or objects passing through.
When an RFID tag passes through the field of the scanning antenna, it detects the activation signal from the antenna. That “wakes up” the RFID chip, and it transmits the information on its microchip to be picked up by the scanning antenna.
In addition, the RFID tag may be one of two types. Active RFID tags have their own power source; the advantage of these tags is that the reader can be much farther away and still get the signal. Passive RFID tags, however, do not require batteries, and can be much smaller and have a virtually unlimited life span.
Why us RFID tags?
- To prevent over-stocking a product;
- For stock security, by positioning tag readers at point of high risk, such as exits, and causing them to trigger alarms;
- For quality control, particularly if there are stock items with a limited shelf life.
Advantages for using RFID for inventory control:
- The tags can be read remotely, often at a distance of several metres;
- Several tags can be read at once, enabling an entire pallet load of products to be checked simultaneously;
- Tags can be given unique identification codes, so that individual products can be tracked;
- Certain tags can be overwritten, enabling information about items to be updated;
- The cost of RFID tagging has fallen in recent years.
What industries would benefit from RFID?
The benefits of a more efficient stock control solution and improved security make it particularly attractive to retailers, wholesalers or distributors who stock a wide range of items. Manufacturers who produce large volume runs of products for different customers would also benefit from this solution.
If you have any questions, regarding RFID and Inventory Control please contact us.