An entrance test like GATE demands extensive knowledge and revision of the concepts covered under the GATE 2018 curriculum. GATE tests the in-depth knowledge and practical knowledge of varied concepts. We at Arihant understand the needs of the students which require comprehensive chapterwise study for in-depth understanding followed by thorough practice of the syllabi to master the concepts. The present book contains last 18 years’ (2000-2017) solved papers of GATE Instrumentation Engineering .Last six years (2012-2017) Solved Papers of GATE Instrumentation Engineering have been given in the beginning to familiarize the aspirants with the current trends of questions asked in GATE Instrumentation Engineering Examination. A brief description about the syllabus is given in the beginning of each chapter which will help the students to know what topics the chapter covers. The book has been divided into 10chapters namely Basics of Circuits & Measurement System, Transducer, Mechanical Measurement and Industrial Instrumentation, Analog Electronics, Digital Electronics, Signals, System & Communications, Electrical & Electronics Measurements, Control System & Process Control, Analytical, Optical & Biomedical Instrumentation, Engineering Aptitude and General Aptitude. The book also contains few tips and tactics for a successful attempt at GATE 2018. The previous year questions divided into 1 Mark and 2 Marks Questions have been given chapterwise and yearwise with detailed solutions at the end of every chapter. The book also contains three crack papers which will help the candidates to analyze the level of preparation for the upcoming GATE Instrumentation Engineering examination 2018. As the book contains ample number of previous years’ solved papers, it for sure is a must have book for preparation for the upcoming GATE Instrumentation Engineering Examination 2018.