Airmar's best-in-class WeatherStation® Instruments meet a growing need for real-time, site-specific weather information. The all-in-one weather sensors measure apparent wind speed and direction, barometric pressure, air temperature, relative humidity, dew point, and wind chill temperature. And, with the optional internal compass and GPS, true wind speed and direction can also be calculated. One compact unit—saving you money, installation time, and repairs in the toughest environments.