The instrument based on the SOnic Detection And Ranging measuring principle is the largest instrument in our measuring equipment pool. By means of emitted sound waves, the wind speed at different heights is determined via frequency shift and transit time of the backscattered signal.

Such a device is used e.g. for the evaluation of sites for wind farms, but also for the exploration of mountain/valley wind systems. Students can also perform measurements on their own questions with this device. A large battery makes the measurement system independent of an external power supply. A disadvantage is the loudness of the emitted sound pulse, which precludes its use in inhabited environments.