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เนื้อหาย่อ : Instrumentation is the science that deals with the means and methods of obtaining and processing physical and chemical information. Instrumentation methods applied to physical and chemical problems, to biological and medical to countless problems in the engineering sciences, as well as in the sciences, archaeology, geology, astronomy, and many other sciences. Instru- mentation is practiced in research institutes, colleges, schools, in hospitals, in ustry and in many government and military research and testing lak Probably the largest relative amount of funds and manpower in almost any research project is absorbed by instrumentation requirements. A working liarity with the principles of modern instrumental methods is, ther ial for investigators in many scientific fields. The book is an intr to the elements of electrical and electronic instrumentation. The word instrumentation means different things to different people. T'or means electric meters and recorders, for others it means circuitry, for still others it means electrochemical apparatus or the application of ysical instruments to biological or medical problems (bioengin bioinstrumentation). has been my intention in this book to cover more or less the ent of electrical and electronie instrumentation. I believe that such a book is more esting and useful than a book limited to special topics. It shoul clear to the student that usually there is not one but a variety of solutions for a