Thomas A. Hughes, a Senior Member of ISA, has 30 years of experience in the design and installation of instrumentation and control systems, including 20 years in the management of ...view moreThomas A. Hughes, a Senior Member of ISA, has 30 years of experience in the design and installation of instrumentation and control systems, including 20 years in the management of instrumentation and control projects for the process and nuclear industries. He is the author of two books: Measurement and Control Basics, 4th Edition, (2007) and Programmable Controllers, 4th Edition, (2005), both published by ISA. Mr. Hughes received a B. S. in engineering physics from the University of Colorado, and an M.S. in control systems engineering from Colorado State University. He holds professional engineering licenses in the states of Colorado and Alaska, and has held engineering and management positions with Dow Chemical, Rockwell International, EG&G Rocky Flats, Topro Systems Integration, and the International Atomic Energy Agency. Mr. Hughes has taught numerous courses in electronics, mathematics, and instrumentation systems at the college level and in industry. He lives in Arvada, Colorado.view less