Radio frequency identification (RFID) Read/Write modules from Contrinex are available in 18 mm or 30 mm diameters, as well as in a 44 mm x 44 mm cube style with transmission ranges of up to 78 mm. In addition, these units can communicate to a PLC or other intelligent devices using the IO-Link point-to-point protocol. A high-temperature tag model is also available, and all products are IP67- and IP68/69K-rated.