The compact, customer-customized RFID sensor transponders are maintenance-free and battery independent, powered with energy provided solely by the antenna of the reader in the network. These sensor tags are therefore predestined to replace the bulky sensor nodes of conventional battery-powered systems in industrial sensor networks. In optimal cases, sensor systems are wireless because fixed cabling increases installation time and cost, particularly in cases with a high sensor density, and can influence measurement results. In addition, due to limited battery lifetime and the changing of batteries increasing maintenance needs and distorting measurement results, battery-powered systems used today are unsuitable, as sensor nodes rely on a dependable power supply to carry out continuous large-scale industrial measurements over several years. Both issues (wiring and necessary battery replacement) can be eliminated by implementing Radio Frequency Identification (RFID) sensor nodes developed at the Fraunhofer IPMS. The sensor transponders reach performance levels necessary for operation from the radiated electromagnetic field of the reader. They are small, robust and can be deployed flexibly. Therefore, the sensor nodes are modularly built and can be arbitrarily equipped with sensors according to individual customer needs.