Measurements are required for
processes and operations.
- measured and indicated quantities not included in control or data acquisition systems
Examples - thermometers, anemometers, electricity meters, water meters, barometers ...
- measured quantities included in data acquisition systems
Examples - values used in statistical models like historical weather, values used to build empirical models like weather forecasts ...
- measured values used in control systems
Examples - thermostat to switch on/off an electric heater, pressure-sensor used in an oil-refinery to control compressors
Measurement and instrumentation strategies.
Devices - sensors - communicating physical properties to observers.