Another issue to consider involves item contents. “There are certain metals and liquids and dielectrics that pose particular problems with their ability to absorb or reflect the RF energy or detune the inlay and make it less sensitive. But for clarification, it should be noted that this is not the case for all metals and liquids,” Bidlingmaier indicated. “For example, some non-conductive liquids like oil are actually quite benign and do not pose a problem. Even conductive liquids or high dielectric materials or non-ferrous metals like aluminum can function with RFID by using what is called the magnetic field characteristics of the RF signal. Although limited in range to less than a foot or so, it is quite effective for close proximity item identification.”
Going for the Gold
RFID continues to impress the judges