Laboratory instrumentation is the use or application of instruments for observation, measurement, or control. It involves the use of or operation with instruments; especially: the use of one or more instruments in carrying out laboratory tests. Instrumentation is the development or use of measuring instruments for observation, monitoring, or control. The use of UV spectrophotometry (to measure light intensity) and gas chromatography. Laboratory instrumentation is a collection of laboratory test equipment. Such a collection of equipment might be used to automate the testing procedures. It could also include the design, construction, and provision of instruments for measurement, control, etc; the state of being equipped with or controlled by such instruments collectively.