Sensors are systems designed to sense change and transfer information to processors for further analysis. The advances in machine design and micromachinery have affected the technological advancements of sensors. The applications of sensors vary across a range of industrial and scientific devices and mechanisms such as medical devices, smartphones, industrial manufacturing units, etc. This book is a compilation of chapters that discuss the most vital concepts and emerging technological trends related to sensor devices and their growing usage. Different approaches, evaluations, methodologies and advanced studies on sensor modeling, design and their applications have been included in this book. Those in search of information to further their knowledge will be greatly assisted by this book.