INTRODUCTION
A tool that measures or adjusts process physical factors like flow, temperature, level, pressure, etc. is known as an instrument. The term "instrument" refers to a wide range of devices, from basic valves and transmitters to more complicated analyzers. Control systems for various processes are frequently comprised of instruments. One of the key subfields of applied instrumentation is process control.Devices like transmitters, valves, VFDs, and motors are included in control instrumentation. These instruments have the ability to alter a field parameter and offer automatic or remote control through PLC, DCS, SCADA system, or other type of computerized controller.
Transmitters are necessary equipment for process automation in order to drive a signal from the field to the control system.