Sensor assembly

Abstract

A sensor assembly includes a housing, a sensor unit attached to the housing, and an airfoil blade. The sensor unit includes a cylindrical shell defining a vertical axis. The cylindrical shell is rotatable around the axis relative to the housing. The cylindrical shell includes a lower edge and extends along the axis from the lower edge. The housing includes an aperture centered on the axis. The aperture defines an airflow outlet from the housing radially inside the aperture relative to the axis. The sensor unit defines an airflow inlet radially inside the lower edge relative to the axis and is positioned to receive airflow from the aperture. A gap is defined between the aperture and the lower edge along the axis. The airfoil blade is positioned at the gap and positioned to interrupt airflow from the housing through the aperture into the cylindrical shell.

Dependencies are inferred from the claim text.