Ideal for classroom use or self-study, this best-selling text has provided thousands of students, technicians, sales people, and others with a practical introduction to the technologies, systems, and strategies involved in industrial process control. The third edition takes the same proven intuitive approach of previous editions. Each chapter begins with basic definitions and mathematical concepts that allow readers to become well versed in the principles necessary to understand the variables that affect process control systems. New features in the third edition include coverage of advanced control-loop tuning methods; magnetostrictive displacement pressure transducers; infrared, microwave, nuclear, radar, and thermal level instruments; radiation, optical, and infrared pyrometers; oxidation-reduction potential measurement; and completely updated material on programmable logic controllers, PC-based control, and human-machine interfaces. The book also includes, for the first time, solutions to exercises that make it more suitable for self-study.