Generally, RFID systems operate at three different frequencies; low frequency (LF), high frequency (HF) and ultra high frequency (UHF), each have there own applications, advantages and disadvantages.
Low Frequency, or LF systems, operate at a frequency of 125 kHz, with a typical read range of approximately 1.5 feet. Since lower frequency RFID tags are less sensitive to interferences, they generally perform best in harsh environments, on metal surfaces, or in the presence of liquids. Typical applications include tracking animals, POS and product authentication.
High Frequency, or HF systems, operate at a frequency of 13.56 MHz and have a much higher read speed and read range than their LF counterparts. The read range for high frequency RFID is approximately 3 ft, but HF tags tend to be more sensitive to liquids and metal surfaces. Typical applications include smart cards, product authentication and airline baggage.
Ultra High Frequency
Ultra High Frequency, or UHF systems, operate at a frequency of 860MHz and have a much higher read speed and read range than HF systems, with a read range of approximately 9.5 feet. UHF systems are also very sensitive to liquids and metal surfaces, but are commonly used throughout the supply chain because of their greater read range.
For more information on RFID frequencies, learn more here. Should you have any questions, feel free to e-mail me at firstname.lastname@example.org.