Instrumentation Question:

Answer #1
Instrumentation engineering is the engineering specialization focused on the principle and operation of measuring instruments which are used in design and configuration of automated systems in electrical, pneumatic domains etc. They typically work for industries with automated processes, such as chemical or manufacturing plants, with the goal of improving system productivity, reliability, safety, optimization and stability.

Answer #2
It is the study of three Process
1.Measuring
2.Monitoring
3.Controlling
by using different instruments for controlling the process variables.