WindSonic – a new ultrasonic anemometer

Describes the developments of a small, robust ultrasonic wind speed and direction indicator. Gill’s patented ultrasonic technology is based on the time‐of‐flight operating principle, which provides vector measurement of air velocity, given the dimensions and geometry of pairs of transducers. In this case, two pairs of transducers are used such that the air velocity can be derived along orthogonal axes and hence the air speed and direction can be computed.