This book instrumentation and control systems contains comprehensive reading material one needs for better understanding of the subject. The book is divided into three sections, Viz--- fundamentals, measurements and control systems in principle. The first few chapters lay a strong foundation and cover the breath fo the subject in terms of fundamentals . The remaining chapters concentrate on measurement of physical parameters and control systems area. The chapters are arranged in the order of the parameters that makes the learning process easy and enjoyable. It is written in a lucid manner with numerous illustrations and figures.