Instrumentation is the use of measuring instruments to monitor and control a process. It is extensively used in factories and labs to control production process, whether it is a steel, cement or a power plant.
Instruments keeps track of variables such as flow, temperature, level, distance, angle, or pressure. Instruments may be as simple as direct reading thermometers or may be complex multi-variable process analyzers. Instruments are often part of a control system in refineries, factories, and vehicles. The control of processes is one of the main branches of applied instrumentation. Instrumentation can also refer to handheld devices that measure some desired variable.
Instruments may also be attached to a control system may provide signals used to operate solenoids, valves, regulators