Patent ID: 7597009

Claim:
A sensor apparatus for measuring a pressure of an airflow in an air duct system having a duct, the duct including a perimeter wall defining a centerline of the duct extending longitudinally through the duct, the sensor apparatus comprising: a first sensor portion including a first end and a second end, the first sensor portion without ports in communication with the airflow, a second sensor portion coupled to the first sensor portion adjacent the first end, the second sensor portion including a first port operable to sense a first airflow pressure of the airflow, and a second port operable to sense a second airflow pressure of the airflow, and a third sensor portion coupled to the first sensor portion adjacent the second end of the first sensor portion, the third sensor portion including a third port operable to sense a third airflow pressure of the airflow, and a fourth port operable to sense a fourth airflow pressure of the airflow.