"This well known book on Instrumentation, Measurements and Analysis encompasses the three viz. Instrumentation Principles, Measurement Techniques and Data Analysis and presents them in a form that is lucid and easily comprehensible to students. The book is divided into three main parts: Part 1deals with the general treatment of instruments and their characteristics; Part 2 gives the details of measurement of actual physical variables referring to part 1 where ever necessary; Part 3 discusses statistical analysis of data. The second edition published in 2004 has been revised by addition of a new chapter on " Electrical Measurements " covering measurement of resistances, inductance , capacitance, voltage, current, power , energy , magnetic flux measurements, wave form generation and measurement, frequency and phase measurements. Another new chapter on Dimensional Measurements and its Application to Metrology has been added which covers Surface measurement, Area Measurement by planimeter, surface roughness by Taly surf techniques, Angle Measurement by using sign bars. This has been done according to the suggestions received from reviewers and several teachers to make the book self-contained. Further, additions have been made to the existing chapters by covering emerging topics like virtual instruments and dimensional measurements for metrological applications including surface roughness , size, area measurement and principle and working of slip gages , pneumatic and optical gages etc. A number of problems and an appendix have been added and correction, where necessary been incorporated"