Abstract: A flow rate sensor may have arms extending outwardly from a central axis or hub, with an aerodynamic upstream surface on each arm, and a blunt downstream surface that creates a reduced pressure zone adjacent to the blunt surface. At least one high-pressure fluid inlet is located in the aerodynamic upstream surface, and at least one low-pressure inlet is located in the reduced pressure zone downstream from the blunt surface. This combination of an aerodynamic upstream surfaces and a blunt face on the downstream side of the sensor generates an amplified signal that is suitable for modern controllers, and is significantly quieter than previous sensors.