The surface wind sensor was developed by H.P.A.H. Irwin to measure not only the mean wind speeds but also the lower frequency fluctuations in pedestrian wind studies. It can be expected to be applied to get data for wind environment evaluation considering wind fluctuation. It seems to be applied at abroad practically. But insufficient information on its practical usability is obtained in literatures. Then, its characteristics and practical usability are examined on the basis of some wind tunnel tests.