Developments have been made in temperature controller technology.
The electronic controllers of the 1970s and early 1980s had an analog design. While these instruments improved upon the performance of their predecessors, they were limited to providing a single function - controlling the process's temperature. With advancements in microelectronics and integrated circuit development, it was only a matter of time before electronic temperature controllers would become microprocessor based. In the late 1980s and 1990s, digital technology provided control engineers with the ability to implement more complex control strategies. This technology also provided a wealth of new capabilities such as autotuning, soft wiring, mathematical function blocks, digital communications, improved displays and smaller size. Yet, with all of these enhancements, the microprocessor's true power had not been harnessed.