The second edition of this highly successful text is intended for use as an introductory course or a second course in Instrumentation. The reviewers comments on the first edition helped refine and crystallise related material leading to the reorganisation of chapters and addition of: Software-controlled measurements Time interval measurement when the two events occur arbitrarily, and to indicate the order of occurrence, and a practical set up for the time interval measurement Multi-phase sequence indicator Decibel meter Input circuitry of a frequency counter Measurement of low-frequencies in a narrow band Basics of ac bridges Quality and dissipation factor measurement by phase compensation technique Impedance measurement in the Cartesian coordinate form Worked examples provided to illustrate the concepts Unsolved problems to help students develop skills in using theory