Abstract: Improvement in a mass air flow meter having an elongated hollow body having a venturi member therein, the improvement comprising channels formed in the outside surface of the venturi member, lands defined by such outside surface which bear against the inside surface of the hollow body, such lands, together with the inside surface of the hollow body, directing the flow of sample air to be measured through such channels, around the outside surface of the venturi member and axially thereof, a first one of the channels being annular and in communication with the interior of the meter for receiving sample air therein, a second one of the channels serving as a measurement path in which the mass of sample air is measured as it travels therethrough, and a third one of the channels being annular and in which air exiting from the measurement path is accumulated before being recombined with the main flow of air traveling through the meter.

Abstract: Improvement in a mass air flow meter having a static pressure manifold disposed upstream from an air flow path for sample air and capable of accumulating a volume of air therein, the flow path constructed to receive an air flow transducer, the static pressure manifold having an inlet arrangement in communication with the kinematic main air flow traveling through the meter so as to be capable of sensing different static pressures thereof, the static pressure manifold having a single outlet serving as the sole inlet for the sample air to be measured by the air flow transducer, the static pressure of the air accumulated in the static pressure manifold being such that it functions as a resultant average of the different static pressures sensed at its inlet arrangement, the static pressure manifold providing substantial immunity for the meter in respect to turbulent air flow upstream therefrom.