Electrical engineering refers to a branch of engineering that focuses on the design, research, and use of systems, machinery, and gadgets that rely on electromagnetism, electricity, and electronics. Instrumentation engineering is the science of measuring and controlling process variables in an industrial or production area. Electrical and instrumentation engineering (EIE) is a subfield of electrical engineering that deals with managing equipment for automated control and measuring process variables inside industrial facilities. It is concerned with the design of instruments that measure physical quantities like flow, temperature, and pressure. This book contains a detailed explanation of the various concepts and applications of electrical and instrumentation engineering. While understanding the long-term perspectives of the topics, it makes an effort in highlighting their impact as a modern tool for the growth of the discipline. This book is an essential guide for both academicians and those who wish to pursue this discipline further.