
Measurement and control devices shall be regarded as an essential part of any automated facility. This type of equipment includes various temperature measurement and control units, liquid analysis apparatus, pressure measurement appliances, level measuring elements, flow and humidity control items. Whereas the following main functions shall be identified: automation itself, monitoring, tracking and recording.
The function of overall automation on the field level shall be entrusted to the controllers, sensors, relays and actuators, valves, drives and motors. As a whole, the field level may be described as “eyes and arms” of the automated facility. This is the lowest, but the most important section of any automated production facility. Sensors collect and convert information like temperature, pressure, flow, electrical signals and further pass it to the controllers. This allows operators to monitor the processes in real time, make analysis and improvements without interruption of the operation. There are following types …

