Bidirectionally flow-impinged device for measuring flow processes of fluids

A device for measuring flow processes of fluids, the device comprising:

• an inlet;
• an outlet;
• a housing;
• a drivable positive displacement flow meter arranged in the housing, the drivable positive displacement flow meter comprising a positive displacement chamber formed therein in which at least one driven impeller is rotatably arranged;
• a first supply duct fluidically connecting the positive displacement chamber with the inlet;
• a first discharge duct fluidically connecting the positive displacement chamber with the outlet;
• a first inlet port via which the first supply duct is configured to open into a front of the positive displacement chamber;
• a second inlet port;
• a second supply duct fluidically connected to the inlet, the second supply duct being configured to open into a rear of the positive displacement chamber via the second inlet port;
• a bypass configured to bypass the drivable positive displacement flow meter;
• a differential pressure sensor arranged in the bypass;
• and
• an evaluation and control unit configured to provide a control of the drivable positive displacement flow meter based on a differential pressure applied to the differential pressure sensor.