RFID Tracking Glossary

Line of sight refers to the direct optical contact between a reader and a marking. This requirement is generally necessary for a barcode or a QR code, because the code must be visible and unobstructed in front of the scanner. In the RFID environment, this is usually not required, because an RFID tag is read by radio. The term therefore describes a central condition of optical identification and at the same time a key difference from radio-based methods. If direct visual contact is missing, an optical code cannot be captured reliably.

A load carrier is an aid used to transport, store or provide goods, materials or components. Typical examples include pallets, containers, small load carriers and special workpiece carriers. In the RFID environment, load carriers are often labelled with an RFID tag so that they can be identified automatically and their movements captured reliably. This supports more precise data capture and improves the object tracking of containers and transport units. The clear identification of load carriers improves availability and control within the ongoing material flow.

In the RFID environment, low frequency refers to a frequency range used for contactless communication between a tag and a reading system. It operates over short distances and with a low data rate. This range is considered comparatively robust in the presence of water, dirt and demanding environmental conditions. Compared with high frequency and ultra-high frequency, the read range is usually shorter, but the detection of individual objects can often be designed very precisely. The choice of the appropriate frequency range  influences read range, stability and the application area of an RFID system. Low frequency is used when workpieces, containers or operating equipment need to be identified reliably at close range.