Vorrichtung zum Bestimmen der Stroemungsgeschwindigkeit eines Gases oder einer Fluessigkeit

A device for the measurement of the flow rate of a gas or of a liquid in accordance with patent application P 4027704.6-52 has two electrodes spaced at a distance from each other in the flow direction, a voltage being applied to said electrodes in such a way that one of the electrodes injects ions into the gas or liquid, the charge of which is at least partly transferred to the other electrode, whereby a measurement current is generated. The device also has a generator to generate a voltage signal changing with time, a current detector to detect a change in the measurement current caused by a change in voltage and an evaluation device to measure the length of time between the change in voltage and the change in the measurement current and to determine the flow rate of the gas and the fluid in relation to the length of time measured. To simplify the manufacturing of this device, it is intended that the two electrodes are arranged at the main surfaces of a common electrode carrier which is insulated at least in relation to one of the two electrodes and has a flow opening extending mainly vertically in relation to its main surfaces