Sensor assembly

Abstract

A sensor assembly includes a housing, a sensor unit attached to the housing, and a brush having a plurality of bristles. The sensor unit includes a shell defining a vertical axis. The shell is rotatable around the axis relative to the housing. The shell includes a lower edge and extends upward 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 positioned to receive airflow from the aperture. The aperture and the lower edge define a gap extending around the axis. The brush is fixed to one of the housing or the sensor unit. The bristles extend across the gap toward the other one of the housing or the sensor unit.

Dependencies are inferred from the claim text.