PRESSURE SENSING TUBE WITH IN-LINE CONTAMINANT BLOCKING

摘要

An apparatus includes a flexible tube having a first end and a second end and an inner wall extending from the first end to the second end defining an inner channel; and a contaminant blocking device disposed within the inner channel of the flexible tube. The contaminant blocking device is configured to communicate a gas pressure there through from the first end to the second end, and to prevent contaminants from passing from the first end to the second end. The apparatus may be a pressure sensing tube connecting a differential pressure sensor and a flow meter in a ventilation arrangement.