By internal antenna: a multitude of designs available, in size and shape: circular, square, rectangular, from few mm to 100 mm or more.

By reading distance: it will depend on the internal antenna and the reading system: from few centimetres to 20 meters

By encapsulation: it can vary from a minimal or light encapsulation (paper, polypropylene,…) to a robust or very robust one (ceramic, ABS, plastic,…) which will have an impact on:
– Your IP: available up to IP69 and resistance to continuous use

– The operating temperature:

• The general one for electronics, from -20ºC to + 70ºC
• Special tags: from -40C to + 220 / 250ºC

– Compatible with ATEX environments

– By fixing systems: with adhesive, with mechanical fixing or by insertion

By the type of reading and recording by the user:

• Only reading
• Rewritable

Due to its frequency: LH (125 and 134 KHz), HF (13.56 MHz) and UHF: from 860 to 960 MHz

In the case of UHF Tags, to be taken into account according to the frequency range for each country:

• Global: 860 to 960 MHz
• American: between 902 and 928 MHz
• European: between 865 and 868 MHz

By type of IC: there are multiple options, depending on the manufacturers

By usage memory: to distinguish between EPC (Electronic Product Code) and user memory, which can vary from a few bits to 512