The comparison that decides projects
| Barcode / QR | UHF RFID (passive) | NFC / HF RFID | BLE beacon | |
|---|---|---|---|---|
| Question it answers | What is this item? | What is here / what passed this point? | Did someone deliberately tap this? | Where is this, roughly, right now? |
| Read range | Line of sight, cm–m | 1–12 m typical passive | <10 cm by design | 10–50 m broadcast |
| Bulk reading | No — one scan each | Yes — hundreds/second | No — one tap each | Yes (all beacons in range) |
| Line of sight needed | Yes | No | No (but proximity) | No |
| Battery in the tag | None | None (passive) | None | Yes — 1–5 yr, then replace |
| Cost per item | Cents (printed) | Rands — label to industrial | Rands (card/tag) | Tens to hundreds of rands |
| Typical uses | Retail POS, documents, low-value items | Stocktakes, gates, laundry, tools | Access cards, payments, checkpoint taps | Live indoor location, personnel |
The frequency ladder, in one paragraph each
LF (125 kHz) is the oldest commercial RFID band: centimetre range, slow, unencrypted in its common forms — it survives in legacy access cards and in animal identification, where its tolerance of water and tissue is genuinely useful. HF (13.56 MHz) is the NFC band: deliberate short range makes it right for cards, payments and tap-to-confirm interactions, and it is the band your phone reads. UHF (860–960 MHz, EPC Gen2 / ISO 18000-63) is where modern asset and inventory work happens: metres of range from a passive tag, hundreds of reads a second, and a single global protocol so tags and readers from different serious manufacturers interoperate. When someone says "RFID project" in logistics, retail or asset management today, they almost always mean passive UHF.
Active RFID — a battery-powered transmitter tag — still exists for long-range and harsh-environment niches, but for most commercial questions the passive-UHF-plus-fixed-reader combination took its market: the infrastructure reads at distance, and the tags stay maintenance-free. If continuous live location is truly the requirement, BLE or UWB positioning systems answer it better than active RFID ever did.
Three pairings that cover most real problems
- Barcode + UHF RFID. The standard warehouse and asset answer: barcodes on low-value, hand-processed items; UHF tags on what needs bulk counting or gate detection. Our tag-selection guide covers where the line falls.
- UHF at the choke point + handheld for the audit. A fixed read point on the gate or dock records what moves; a handheld reconciles what remains. This is the architecture behind gate automation and most stocktake projects.
- NFC for people, UHF for things. Access cards and checkpoint taps identify a person deliberately; UHF identifies objects in bulk. The two coexist happily — they are different bands doing different jobs, not competitors.
Where each one goes wrong
Barcodes fail where labels get dirty, abraded or hidden — a workshop floor defeats them quickly. UHF fails on metal and liquid unless the tag is built for the surface (on-metal construction), and it cannot give you a live position — it tells you about read events at read points, which is exactly right for gates and counts and exactly wrong for "where is it now". NFC fails whenever you need range or bulk — that is by design, not weakness. BLE fails quietly, years in, when a thousand beacon batteries start dying at different times; budget the replacement programme on day one or the map slowly fills with ghosts.
How we choose: we run the question test on your actual problem — what has to be identified, at what distance, how many at once, and does anyone need it live — then usually land on a two-technology design. addanode delivers the result as a turnkey project: tags, readers, read-point design, integration and the honest advice when the cheaper technology is the right one.