The Sourayan Make Wind sensor is a compact weather sensor integrated with highly accurate wind speed and wind direction sensors. Wind measurement is based on our ultrasonic technologies and is of a robust, high-strength construction designed to withstand installation and use with no fear of damage commonly experienced with more fragile cup/vane weather stations. Our weather sensors are made of molded thermoplastic, also known as ASA, which has its outdoor weather ability. ASA is extremely resistant to UV radiation from the sun; it is frost and heat resistant, standing up to all climatic conditions for over 10 years.