RFID stands for Radio Frequency Identification. Radio waves are used for identifying a person or object. This makes it possible to open a door without using a key, or pay for a cup of coffee by holding a card near the reader.
With Hettlock RFID, the transponder integrated in a card or fob is held up close to a transmitter, also called a reader. The transmission energy makes the transponder antenna oscillate, releasing a flow of low-level current. This current is sufficient to make the chip emit its ID number which, in turn, is registered by the reader. This technique can also be used for communicating other data and storing them on the transponder. Hettlock RFID works at 125 kHz, known as low frequency, or 13.56 MHz, known as high frequency. Locks operating at 13.56 MHz can also be integrated in building service systems. Depending on chip type, they have a reach of a few centimetres.
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