Volume or mass flowmeter

摘要

The sensor (1) has evaluation electronics (2), which comprises a first circuit part (21), for generating a flow signal (q), a second circuit part, for generating an output signal (qc), and a third circuit part (23). The flow signal is proportional to the fluid flow in a given measuring area with a higher speed. The frequency of the output signal is proportional to the flow in the given measuring area in a measuring direction determined by the construction of the sensor with a higher speed. The third circuit determines and stores a counter flow in the opposite measuring direction at a given measuring time, and subtracts it from the measured flow.