Instrumentation is a branch of Science and Engineering dealing with measurement and control of various parameters. Transducers play a vital role in measuring the parameters. in this digital era, it is necessary that the parameters be in an electrical form, and that is what a Transducer does. This book presents various transducers that can be used to measure parameters such as displacement, force, weight, temperature, level, pressure, flow, humidity etc. Problems too have been extensively solved.