What is RFID?

The stocktake that used to block the warehouse for two days finishes in two hours: an operator walks between the racks with a handheld reader while hundreds of tags answer by themselves over radio, with no boxes taken down and scanned one by one. That is the practical difference between RFID and barcodes. A barcode demands direct line of sight and one scan per item; an RFID tag is read at a distance, through packaging, in hundreds of copies simultaneously. Each tag carries a unique identifier linked in the system to the product, pallet or piece of equipment it sits on, so reader gates at goods-in and dispatch record movements automatically and the stock figure inside the ERP starts matching the warehouse without human effort. Applications reach well beyond the warehouse: tracking tools and equipment on construction sites, returnable containers, textiles in industrial laundries, and access control. The business decision is pure arithmetic, because a tag costs more than a printed barcode, so the technology justifies itself wherever the value of visibility — fast stocktakes, reduced losses, no forgotten scans — exceeds the cost per tag. At current prices that threshold keeps falling into more industries every year.