Automation Basics articles from InTech magazine.
Process Control Learning Objects from Wisc-Online.
Recommended books:
Fundamentals of Industrial Instrumentation and Process Control by William C. Dunn, available from Amazon. (A good value)
Process Control Instrumentation Technology, 8th Ed, by Curtis D. Johnson, available from Amazon. (Updated version of classic text)
Instrumentation and Process Control by Franklyn Kirk, available from Amazon.
The Condensed Handbook of Measurement and Control, 4th Edition, by N. E. Battikha, available from Amazon.
Electrical & Instrumentation Tech 