This chapter is about the design and experimental characterization of an integrated prototype for tracing food preservation quality along the distribution chain by monitoring its environmental preservation conditions. The system includes humidity, temperature, and light intensity sensors with the respective interface circuits and an A/D converter. The target application of the microsystem is a smart tag including an RFID transponder for collecting energy and transmitting data, as well as a micro-battery for energy storage. The developed microsystem has been fabricated in a 0.18 μm CMOS technology and achieves better than 0.5 °C and 6 W/m2 accuracy for temperature and light intensity respectively, while nominally consuming less than 1 μA at 1.8 V supply. Chemical on-chip capacitor dielectric composition, based on Sylgarl 184 polymer, is being optimized for maximum sensitivity response in terms of …