RFID – Definition and How It Works, Simply Explained
RFID (Radio Frequency Identification) enables contactless data transfer between a transponder and a reader – the basis for modern access and locker systems.
How RFID works
RFID (Radio Frequency Identification) enables contactless data transmission between a transponder (tag or card) and a reader via radio waves. Passive transponders draw energy from the reader field, active ones have their own battery.
The transponder’s unique ID is read out and matched against stored permissions – the foundation of access systems, time tracking and inventory management.
Use cases
- Access control in office, production and leisure
- Issue and return of tools and PPE
- Time tracking and cafeteria billing
- Logistics and inventory management
Frequently Asked Questions
Which RFID frequencies exist?
Common are LF (125 kHz), HF (13.56 MHz, incl. NFC) and UHF (860–960 MHz).
Can RFID be jammed?
Physically yes, but with significant effort. Encrypted cards are additionally protected against cloning.
What is the read range?
LF/HF a few centimetres, UHF several metres – intentionally kept short in access systems.