RFID is a radio frequency identification technology, not a sensor. It mainly identifies the marker by its unique ID number. RFID is a simple wireless system with only two basic components that are used to control, detect and track objects.
The sensor is a detection device that can sense the information being measured and can transform the information sensed by the detection into electrical signals or other required forms of information output in accordance with certain laws to meet the transmission, processing and storage of information. Requirements for display, recording and control. It is the first link to achieve automatic detection and automatic control.
Both are Internet of Things technologies. The difference is that sensor technology can process perceived objects. RFID is only capable of identification without processing capabilities.