A device for measuring a volume flow, especially a tidal volume flow
sensor, with a flow channel (1) and with a sensor element (6) arranged
within the flow channel (1), is shown and described. The task of
providing such a device, in which the sensor signal, which is generated
by sensor elements arranged in the flow channel, remains as free as
possible from distortions during the transmission to an evaluating unit,
is accomplished by providing an internal circuit (3), which is arranged
within the flow channel (1) and includes the sensor element (6). An
external circuit (7) is arranged outside the flow channel (1). The
external circuit (7) is designed for contactless, inductive coupling with
the internal circuit (3) for supplying same with energy and for reading.