This book unravels the recent studies in the field of modern sensors and sensor systems. It presents researches and studies performed by experts across the globe. Sensors and sensor systems are the objects used to detect changes in any given environment. They use electrical and optical signals to find the events and then give outputs based on them. The most basic types of sensors are humidity sensor, touch sensor, pressure sensor, gas sensor, gyro sensor, acceleration sensor, biosensor, chemical sensor, etc. This text explores all the important aspects of sensor systems in the present day scenario. Most of the topics introduced in it cover new techniques and the applications of the subject. While understanding the long-term perspectives of the topics, the book makes an effort in highlighting their impact as a modern tool for the growth of the discipline. Scientists and students actively engaged in this field will find the book full of crucial and unexplored concepts.