What is RFID?
RFID stands for Radio-Frequency Identification — a technology with which objects can be identified and tracked wirelessly using radio waves.
Instead of scanning a barcode, an RFID reader reads an RFID Tag from a distance, even without line of sight.
RFID is widely used in logistics, manufacturing, warehouse management, retail, healthcare and industry.
🧠 How does RFID work?
An RFID system consists of:
- RFID Tag: a chip with a unique ID and optional data storage
- Antenna: receives and transmits signals
- RFID reader: activates the tag and reads the data
- Middleware / backend: processes the data into, for example, ERP, WMS or MES
The tag can be passive (no battery) or active (with a battery and a longer range).
🔗 Types of RFID
| Type | Frequency | Range | Applications |
|---|---|---|---|
| LF (Low Frequency) | ~125–134 kHz | < 10 cm | Access systems, animal identification |
| HF (High Frequency) | 13.56 MHz | 10–30 cm | Books, tickets, NFC applications |
| UHF (Ultra High Frequency) | 860–960 MHz | up to ±10 m | Logistics, pallets, clothing, SSCC |
| Active RFID | Various | > 100 m | Vehicle tracking, outdoor asset tracking |
🎯 What is RFID used for?
| Application | Example |
|---|---|
| WMS and logistics | Automatic detection of pallets and goods |
| Retail | Anti-theft and real-time stock management |
| UDI in healthcare | Scanning medical devices without contact |
| MES | Tracking product carriers through the factory |
| TMS and transport | Automatic load/unload recognition at gates |
| Clothing / fashion | Quick counting and replenishment |
📦 RFID vs. barcode
| Aspect | RFID | Barcode (EAN, GS1-128) |
|---|---|---|
| Line of sight needed? | No | Yes (must be visible to the scanner) |
| Read range | Up to several metres | A few centimetres up to 1 metre |
| Multiple at once? | Yes (bulk scan) | No (one at a time) |
| Reusable? | Yes (with passive and active tags) | No (one-off on the packaging) |
| Cost | Higher per tag | Cheap (printable label) |
✅ Benefits of RFID
- Faster and more efficient scanning (bulk, no line of sight)
- Real-time visibility of stock and location
- Fewer human errors
- Process automation in the warehouse or factory
- Increased traceability of critical goods
📌 In summary
RFID is a wireless identification technology that allows you to track objects automatically and remotely, without direct interaction or line of sight. It makes processes smarter, faster and more accurate — from receipt through to dispatch.