The proximity card consists of a transponder (a chip connected to an antenna) laminated with PVC, which can be printed using offset or screen printing and finished with an overlay that protects the print and allows for sublimation personalisation. Card transponders are usually passive, which means they do not have their own power supply but rely on receiving energy from the proximity reader. Upon receiving this small amount of energy from the proximity reader, the tag transmits a response via the antenna. The standard reading distance is between 5 cm and 10 cm.


  • Read-only:
    The only information stored on the chip is the UID (unique identification number), which is unique.
    Example: This number is used, for example, to link staff members to an access control system. This number can also be linked to a staff member in the access control/time and attendance software and assigned as their staff number.
  • Read/write:
    The chip contains the UID but also has a memory in which information can be stored. The memory capacity ranges from 8 bytes to 8,192 bytes.
    Example: each letter, number and punctuation mark is equivalent to 1 byte.


Low frequency

High frequency

ChipsFrequencyReportManufacturerRF Standard
EM4102125 kHz64-bit OREM/
EM4550125 kHz1Kb R/WEM/
AT5567125 kHz330-bit read/writeATMEL11784/85
Hitag1125 kHz2Kb R/WNKP/
Hitag2125 kHz256-bit ORNKP11784/85
Hitag S2048125 kHz2Kb O/RNKP11784/85
ChipsFrequencyReportManufacturerRF Standard
Mifare 1K 55013.56 MHz1 Kbyte R/WNHPISO 14443 A
Mifare 4K 57013.56 MHz4 kbyte R/WNHPISO 14443 A
Mifare Ultralight13.56 MHz512-bit read/writeNHPISO 14443 A
Mifare DESFIRE 4K/8K13.56 MHz4K/8K bytes R/WNHPISO 14443 A
I-Code* SL1 IC 53013.56 MHz64-bit R/WNHP/
I-Code* SL2 IC 52013.56 MHz128 bytesNHPISO 15693 A
SAI51213.56 MHz512-bit read/writeNHPISO 14443 B


Ultra-High Frequency (UHF)


Our antenna design for UHF tags is ideal for medium- and long-range traceability applications, and is particularly well-suited to environments where radio frequency transmission is challenging. Its design ensures flawless performance over both short and long distances. We use the Impinj Monza 4 chip; the Monza 4 family offers a range of models for different applications, setting new standards in RFID privacy, improving the chip’s orientation tolerance, enhancing read/write performance, and increasing memory capacity.

Communication protocol and memory specifications

EPC Gen 2 communication protocol. ISO 18000-6C. ISO/IEC 15963 (UID standard).
Class 1 protocol. Component used: Impinj Monza 4.

IC NAMEMonza 4DMonza 4EMonza 4QT
EPC MEMORY128 bits496 bits128 bits
USER MEMORY32-bit128 bits512 bits
SERIALISED TID32-bit32-bit32-bit
RESERVED MEMORY (password kill)64-bit64-bit64-bit
READ SENSITIVITY LIMIT-18 dBm-18 dBm-18 dBm
WRITE SENSITIVITY LIMIT-14.6 dBm-14.6 dBm-14.6 dBm