Measuring device with RFID tags and sensor

It is described with at least one organic semiconductor layer as a multi-layer body and formed of covered with a protective layer RFID transponder. The RFID transponder (1) comprises at least one sensor element (14) and the protective layer (16) includes a valve disposed over the at least one sensor element (14), measuring window (18) to be determined for by the sensor element (14) measuring size permeable is. The protective layer may be formed also permeable to the by the sensor element (14) to be determined measured variable, so that a measurement window is not needed.