The second edition of the 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 crystalise related material leading to the reorganisation of chapters and addition of: l Software-controlled measurements l 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 l Multi-phase sequence indicator l Decibel meter l Input circuitry of a frequency counter l Measurement of low-frequencies in a narrow band l Basics of ac bridges l Quality and dissipation factor measurement by phase compensation technique l Impedance measurement in the Cartesian coordinate form l Worked examples provided to illustrate the concepts l Unsolved problems to help students develop skills in using theory.