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 GATE tutor for GATE Instrumentation Engineering has been divided into three sections namely General Aptitude, Engineering Mathematics and Instrumentation Engineering, each sub-divided into number of chapters. The General Aptitude section covers Verbal Ability, Critical Reasoning and Numerical Ability. The Engineering Mathematics section has been divided into Linear Algebra, Calculus, Differential Equations, Complex Variables, Probability & Statistics, Numerical Methods and Transform Theory whereas the Instrumentation Engineeringsection has been divided into nine chapters namely Basics of Circuits & Measurement Systems, Transducers, Mechanical Measurement & Industrial Instrumentation, Analog Electronics, Digital Electronics, Signals,Systems & Communication, Electrical & Electronic Measurements, Control Systems & Process Control, Analytical, Optical & Biomedical Instrumentation and Microprocessor & Microcontroller. The chapters cover unitwise and topicwise collection of theory and question answers. The whole coverage of the syllabi in the book has been kept identical to the format of the exam including relevant study material and variety of questions with their complete solutions. Each chapter in the book contains ample number of solved problems which have been designed on the lines of questions asked in previous years??? GATE Instrumentation Engineering. Also unsolved practice questions have been covered under the Unit Exercise sections. The exercises contain questions as per the GATE pattern i.e. 1 mark questions, 2 marks questions and common data & linked answer questions. The books contain Unitwise Numerical Answer Type Questions and newly added topics in questions. The book also contains last six years??? (2012-2017) solved papers of original online GATE Instrumentation Engineeringto give the aspirants an insight into the trends of questions asked in GATE Examination. This book also contains focused study material for General Aptitude and Engineering Mathematics. At the end of the book, the newly added topics in GATE syllabus have also been provided along with five Mock Tests to help aspirants practice and self analyse their level of preparation for the upcoming GATE Instrumentation Engineering 2018. The book comes with a free CD containing Online Mock Tests for GATE Instrumentation Engineering. As the book contains ample study and practice material, it for sure will help aspirants achieve success in the upcoming GATE Instrumentation Engineering Exam 2018.