The invention relates to an arrangement for flow sensors and flow ducts used for a flow-based thermal anemometer in a sensor head that is embodied as a hollow member. Knowing about three-dimensional flow regarding the average velocity, direction, and degree of turbulence in the area where persons stay, in addition to other variables, is indispensable in air conditioning, especially the degree of turbulence playing a decisive role. The inventive arrangement makes it possible to determine the variables defined in DIN 1946, part 2, particularly the degree of turbulence and the average velocity, while detecting the velocity vector with great accuracy and reliability at a very high time resolution in three-dimensional space.
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