Abstract: A gas delivery sensor, of the type in which two upstream and downstream pressure pick-up conduits, which are each connected to a pressure sensor, open into a gas flow duct, in which a permeable element extends axially at least between opening ends of the two pressure pick-up conduits characterized in that the permeable element is produced in the form of a body which has, in cross-section, a shape complementary to that of the duct and which includes slots extending radially about its axis, so as to open radially onto an outer lateral surface of the body, and in that the slots extend axially over the entire length of the permeable body.

Abstract: An air flow measurement device includes a connector conduit for the air flow having a transverse restrictor plate located therein with a plurality of uniform and uniformly spaced apertures extending therethrough. The restrictor plate is maintained in the connector conduit by a pair of sleeves each of which includes on its interior diameter a plurality of angularly spaced passages and on its outer diameter a circumferential groove communicating with the passages. A pair of valves are mounted through the wall of the connector conduit for communication with the circumferential grooves so that a differential pressure meter may be connected to the valves to measure the difference in pressure upstream and downstream of the restrictor plate to thereby determine the flow rate. The sleeves may be made in two identical pieces to form the passages and grooves, and additional smoothing screens may be positioned upstream and downstream of the restrictor plate by further identical sleeve pieces.

Abstract: A mass flow meter for flowing media that works on the Coriolis Principle includes at least one oscillating Coriolis line carrying the flowing medium and at least one housing holding the Coriolis line, and attachments to the housing. The mass flow meter is characterized by the fact that at least some of the attachments are connected to the housing via means of oscillation decoupling.