How to Choose UHF RFID Labels for Tracking
UHF RFID labels capture goods and assets in bulk without line of sight. This guide explains how to select chip, antenna size, on-metal suitability and read range in the European 865-868 MHz band, and when RFID beats the classic barcode.
View RFID labelsHow does a UHF RFID label work?
A passive UHF RFID label consists of a chip (IC) and a printed or etched antenna on a carrier. The reader transmits in the 865‑868 MHz UHF band, the tag harvests that energy and answers by backscatter with its unique number (EPC).
Because UHF tags need no battery and respond in bulk within the field, hundreds of items per second can be read without line of sight. In Europe, EN 302 208 caps the transmit power at 2 W ERP, while the US band runs at 902‑928 MHz with higher power.
Chip, antenna and range - what matters?
Four criteria drive the choice: the chip type with its memory, the antenna size, the required read range and the surface. Larger antennas and sensitive chips such as NXP UCODE or Impinj Monza increase range, while compact tags fit small components.
- EPC memory: 96 bit suffices for SGTIN serialisation, 128 bit and user memory carry extra data.
- Chip sensitivity: modern ICs such as UCODE 9 read reliably even in a weak field.
- Choose the inlay: an inlay is the chip plus antenna, the label adds carrier material and adhesive.
- Always test range in the real environment, since racking, liquids and metal attenuate the field.
Why do metal objects need special on-metal tags?
Metal reflects and detunes the antenna of a standard label, so the range collapses to almost zero. On-metal tags use a spacer of foam or ceramic that decouples the antenna from the metal and makes the field usable again.
Liquids and moist goods also strongly attenuate the UHF signal. For tools, machines, IT hardware and gas cylinders, dedicated on-metal labels or rugged hard tags are therefore mandatory, available as screw-on, riveted or cable-tie versions.
RFID or barcode - which is the right choice?
The barcode is cheap, virtually free to print and unbeatable for single scans with line of sight. UHF RFID shows its strength when many objects must be captured at once, without sight and automatically - for example at the goods-in gate or during stocktaking.
- Choose barcode for low volume, single scans and a tight budget.
- Choose UHF RFID for bulk capture, stocktaking, access and process automation.
- A hybrid is often best: an RFID label with printed barcode and plain text as a fallback.
Frequently asked questions
Which frequency do UHF RFID labels use in Europe?
In Europe UHF RFID operates in the 865‑868 MHz band at up to 2 W ERP per EN 302 208. US tags at 902‑928 MHz are not directly interchangeable, though modern inlays often cover both regions.
What read range does a passive UHF tag achieve?
Passive UHF labels typically reach 1 to 10 metres in free field, depending on antenna size, chip, reader power and surface. Metal and liquids shorten the range significantly.
Why does a normal RFID label fail on metal?
Metal reflects the radio field and detunes the antenna, so the tag barely harvests energy. On-metal tags with a foam or ceramic spacer solve the problem.
When is RFID worth it over a barcode?
RFID pays off when many objects are captured at once and without line of sight, such as stocktaking or goods-in. For simple single scans the barcode remains more economical.
Looking for the right UHF RFID labels?
We supply UHF inlays, on-metal tags and rugged hard tags for warehouse and asset tracking - compliant with EN 302 208 and matched to your reader.
Radio compliant
Inlays for the EU 865-868 MHz band per EN 302 208.
On-metal solutions
Special tags for metal, liquid and harsh environments.
Field verified
Range and read rate verifiable in the real setup.
Expert advice
We help with chip, inlay and reader selection.