Sensor or a combination of sensors measures relevant parameters of significance and importance with specified reliability and accuracy. Selectivity, sensitivity, response time, ability to work in a given environment, cost and ease of measurement etc. are a few key aspects to define merit of a sensor for a given application. It is also important to establish sensor data management, modeling as well as sensor networking to realize the purpose of measurements; be it for security, research, industry or medical diagnosis.SENSOR SCIENCE AND TECHNOLOGY is an authoritative comprehensive treatise on historical perspectives, challenges of measurements and future directions. The book deals with principles and application of various sensors for dimensions, compositions, structures, defects flow, vibration, position, etc. The book draws on interesting case studies to explain applications. A few approaches such as pulsed sensors, nanotechnology, based sensors, wireless networking of sensors, etc are highlighted in the book.The book is aimed at engineers, scientists, technologists and students desirous to be aware of capabilities of sensors and engaged with measurements to enable the reader to design sensors and find a framework of approaches to make a right choice of sensor or a combination, for specific applications.