* Measuring physical quantities, such as temperature, pressure, and flow rate
* Recording data, such as the output of a sensor or the results of an experiment
* Controlling physical processes, such as the flow of water or the temperature of a room
Instruments can be either analog or digital. Analog instruments use mechanical or electrical components to measure or record physical quantities, while digital instruments use electronic components to do the same.
Some common examples of instruments include:
* Thermometers measure temperature.
* Barometers measure pressure.
* Flow meters measure flow rate.
* Data loggers record data.
* Controllers control physical processes.
Instruments are essential to many fields, including science, engineering, and industry. They are used to ensure that physical quantities and properties are measured, recorded, and controlled accurately and reliably.