Patent ID: 7243556

Claim:
An airflow sensor for use in a flow conduit having a flow direction and upstream and downstream directions defined by the flow direction, the airflow sensor comprising a first portion, a second portion and a third portion disposed in stacked relation upon one another and positioned, in use, in the flow conduit to define: a hub centrally disposed in said flow conduit, said hub having a first interior chamber, a second interior chamber, a streamlined upstream-facing surface, a downstream-facing surface and a sidewall connecting said upstream-facing surface and said downstream-facing surface, said sidewall having defined therein one or more static pressure ports, the first interior chamber communicating with the interior of the flow conduit through said one or more static pressure ports; and a plurality of sensor tubes extending radially outwardly from said hub, transverse to the flow direction, each tube having: a streamlined upstream-facing surface having defined therein one or more total pressure ports; a downstream-facing surface; an interior passage communicating with the second interior chamber of the hub and communicating with the interior of the flow conduit through said one or more total pressure ports; and an end portion, wherein each of said one or more static pressure ports is located in the downstream direction relative to a respective one of the sensor tubes.