these people are SICK (AG)

" Intelligent identification

Radio-based RFID technologies in the HF (high frequency) and UHF (ultra high frequency) ranges supplement SICK’s industrial automation portfolio. In applications where process-relevant data is modified remotely, RFID makes it possible to store data on writable and rewritable media. And, in contrast to optical solutions, RFID provides reliable identification of all objects – despite dirt and everyday wear."

https://www.sick.com/us/en/identification-solutions/rfid/c/g93063