The classic wind sensor is a transmitter for measuring the horizontal air flow irrespective of its direction using an analog output signal. The cup star speed is scanned using an opto-electronic, contactless and wear-free procedure and starts up particularly gently. There is a plug-in connection in the shaft of the device. Assembly is preferably on a mast. All main parts are made from anodised aluminium. This wind sensor is equipped with an electronically regulated heater which can also be disconnected to save energy if wished.