There are several versions of RFID that operate at different radio frequencies. The choice of frequency is dependent on the business requirements and read environment - it is not a technology where 'one size fits all' applications. Three primary frequency bands are being used for RFID: - Low Frequency (125/134KHz) Most commonly used for access control, animal tracking and asset tracking - High Frequency (13.56 MHz) Used where medium data rate and read ranges up to about 1.5 meters are acceptable. This frequency also has the advantage of not being susceptible to interference from the presence of water or metals - Ultra High Frequency (850 MHz to 950 MHz) Offers the longest read ranges of up to approximately 3 meters and high reading speeds |