Analog Locating suitable replacements for failed pressure sensors in existing processes can require 'catalog dexterity' on the part of the control engineer. This is the second of a six-part series on Process Sensing. Intelligent instrumentation appeared in January. Search for similar articles .
Every control engineer knows the story.
A key pressure sensor is sending erratic readings to its controller. All other sensors in this region of the process seem to be functioning correctly. However, if maintenance stores have overlooked restocking the part the last time replacement was done, there could be a serious problem. Not all process installations are new. And not all new installations require the sophistication of full digital control.