How RFID works

The abbreviation RFID is based on the term "radio-frequency identification."

RFID enables automatic identification and localization of objects and living things and thus substantially facilitates the collection of data.

An RFID system consists of a transponder, which is located on or within the object which should be identified and carries the identifying code and a reader units for reading. RFID transponders can be as small as a grain of rice and implanted in animals.

Coupling is done by the reader in generating short-range alternating magnetic fields  or high-frequency radio waves. This method allows not only to transmit data, but also to supply the transponder with energy. Only if long distances have to be achieved and the cost of the transponder is not very critical, active tags with own power supply are used.

petWALK uses standardized long-wave frequencies, which are completely safe for pets and humans. The transponder (animal-chip) contains no battery, and is powered by the antenna of the door when the animal approaches.