Instrumentation and Control Systems in Chemical Engineering
The Development of Process Control Instruments and Control Systems Has Gone Through Four Stages:1. In the 1950s, pneumatic unit combined instruments were the main focus. 2. In the 1960s, the emergence of electronic components like transistors allowed for the development and application of electric unit combined instruments (DDZⅡ). 3. In the 1970s, safety spark explosion-proof … Read more
