Chip-free wireless sensor electronic tags reduce environmental impact caused by single-use RFID technologies

https://techxplore.com/news/2025-01-chip-free-wireless-sensors-environmental.html

"identifies objects, measures temperature without microchips... flexible, lightweight, inexpensive coils smaller than those in credit cards, sensing material of PDMS silicon rubber/ carbon fibers... absorb electromagnetic multiplexed signals from wireless hand-held reader. (£100)... carry identifying information, take real-time temperature (20 to 110°C), pH, humidity... warning food risk, also use in health care, smart clothing... multiple tags read at once at different distances... tags manufacture simple, scalable process"

Related: Scientists enhance high-resolution distributed temperature sensing using plastic optical fibers
https://techxplore.com/news/2025-02-scientists-high-resolution-temperature-plastic.html#google_vignette