Thoroughly updated, revised and expanded, this anticipated second edition of a popular textbook now includes much more material on chemical sensors and chemical-biological sensors. It focuses on recent developments including Radar and Lidar sensors, lightning detector sensors, gunshot detector sensors and many more. In addition, there is a greater emphasis on energy harvesting and integration of sensors and actuators into smart devices. A wealth of supplementary material is now provided, including a solution manual and PowerPoint slides.