Abstract
A constant temperature anemometer is described which is designed to operate hot wires with diameters in the range 0.63-5 mu m. A special feature of the design is the use of separate current sources to supply the different halves of the bridge. This feature eliminates the need for dynamic stability compensation, necessary for commercial constant temperature anemometers. The frequency response of the present circuit compare favourably with that of a commercial circuit. The probability density and spectral density functions of the longitudinal velocity fluctuation, obtained with wires of different diameters, are in good agreement with those obtained with a commercial circuit.