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FREQUENTLY ASKED QUESTIONS

 
 

RFID (Radio Frequency Identification) is a technology that uses radio frequency signals to uniquely and automatically identify objects. In simple terms, it is a data communication method that connects physical objects with digital systems. Unlike barcode systems, RFID does not require an optical line of sight to scan objects; this allows items to be identified even inside closed boxes, packages, and in certain environments, behind barriers. Today, RFID technology is a key component of digital transformation, from inventory management and asset tracking to contactless payment systems.

The operation of an RFID system is based on the electromagnetic interaction of three main components: Tag, Reader and Antenna.
  1. Signal Transmission: The RFID reader continuously emits radio waves through the antenna.
  2. Activation and Response: When these waves reach an RFID tag, the tag becomes active, if it is passive, by using the energy received from the reader, and sends its unique identification data back via radio waves.
  3. Data Processing: The signal captured by the reader is converted into digital data and transferred to computer systems, inventory management software or ERP platforms.
This process takes place within milliseconds and enables hundreds of items to be recorded accurately at the same time.

  • Read Range: The power of the antenna and the size of the RFID tag determine the reading distance.
  • Surface Compatibility: Standard RFID tags do not perform properly on metal surfaces or on materials containing liquid; in such cases, on-metal RFID tags should be preferred.
  • Environmental Conditions: For humidity, high temperature or chemical exposure, industrial-grade durable RFID tags should be selected.

When choosing an RFID reader, key criteria include whether the application requires fixed or mobile use, such as a handheld RFID terminal or a fixed RFID reader, the connection type, including Wi-Fi, Bluetooth or Ethernet, and how many RFID tags need to be read simultaneously. For industrial environments, rugged models with an IP67 protection rating should be selected.

Frequency ranges determine the application area:
  • LF (125-134 kHz): Short-range applications, animal identification and access control.
  • HF (13.56 MHz): Contactless payments, library tracking and NFC applications.
  • UHF (860-960 MHz): Long-range RFID applications, warehouse management, logistics operations and inventory tracking.

RFID tags are mainly divided into three categories:
  • Passive Tags: They do not contain a power source and receive their energy from the RFID reader. They are a cost-effective option for short and medium-range projects, up to 12 meters with UHF RFID.
  • Active Tags: They have an internal battery. They are used for long-range tracking and real-time location systems, also known as RTLS.
  • Semi-Passive Tags: They use a battery to record sensor data, such as temperature, but still require reader energy for communication.
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