Many “LF” transponders operate at 125 kHz, however all Texas Instruments LF RFID operates at nearby 134.2 kHz. These devices operate on the principle of magnetic inductive coupling, much like that the primary-secondary winding pair of a power transformer. Although they are classified as Radio Frequency Identification devices they actually employ magnetic coupling rather than conventional radio principles.

LF RFID tags are more suited to use near liquid and metallic environments, as compared with high frequency or UHF devices. LF devices typically can only be read when only one transponder is in the field at a time. LF devices typically do not have anti-collision properties.

The type of LF transponder you will choose will depend greatly on the type of project you are undertaking. Selecting the tag is just as important as the type of reader and antenna you are seeking. Dynasys carries wide a variety of different tags for virtually any project.

We carry many varieties of LF transponders ranging from the small 23/32mm glass transponders (used in animal tracking, race timing, etc.) to the large 85mm disk transponders (used in automobile tracking) to the specialized mount-on-metal transponders that are specifically detuned to be used on metal surfaces.

Please call our sales engineers, experts in RFID component selection, and they will gladly help guide you through your selection process.

Want to learn more about transponders?
Learn About the Different Transponder Types
RFID Technology: Making the Right Choices