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Airspeed and pressure are measured with air velocity metres. They may measure various parameters such air temperature, pressure, relative humidity, and windchill factors. They are also referred to as anemometers. These wind movement testing tools are frequently used in engineering, HVAC, and weather prediction. There are compact anemometer to fit in your pocket or a high-accuracy instrument capable of calculating air volume, air temperature, and datalogging for a specific application.