The amount of information that can store a RFID tag strongly depends on the manufacturer and the desired application. RFID tags can be classified into two categories: «Low Memory ” and ” High Memory “. The low memories are the most common and have a user memory of 512bits. The High Memory can have a storage capacity from 2KB to 64KB.
The read range of a tag depends on several factors: manufacturer, frequency, power of the reader, environment, memory size, etc. Generally, LF or HF RFID tags frequency are read around a few inches while the UHF frequency allows reading distances of several meters in optimal conditions
The choice of an RFID tag for harsh environment depends on the constraints the tag will be exposed to (temperature, metal environment, dust, chemical splash) and needs in terms of reading (distance). Depending on all these parameters, there are several models of tags that meet the constraints mentioned. NEXESS has expertise and know-how on the choice of tags for industrial environments and can assist you in identification.
The choice of frequency depends on the application of the RFID technology and the environment envisaged. The HF frequency allows to read tags at a distance of about a few centimeters while the UHF frequency allow a reading at several meters depending on the environment.
HF technology remains highly disturbed by metal environments while UHF technology will get through with specific tags.