This book provides a detailed overview of multifunctional sensors, covering discussions on different types of multifunctional sensors developed in past years. As a case study, the development of admittance-type multifunctional sensors is provided, constituting its construction, working principles, measurements, and instrumentation used. It also explores a review of the research in the field from 1990 to 2022. It will be a useful resource for researchers of sensor technologies across physics, engineering, and other physical sciences.Key Features Presents a case study of a multifunctional sensor that measures temperature and level simultaneously Discusses latest trends in the area and can be understood by advanced students up to research level scholars Looks ahead to the future of these sensors for further research opportunities.