Abstract: A differential pressure transducer housing assembly comprising a sensor housing and a connectable cap member. The cap member includes an input port, a post and at least one coupling member. The sensor housing includes an opening for receiving the post of the cap member, and a bracket for engaging the coupling member. When the cap member is connected to the sensor housing, the coupling member and the bracket engage such that the cap member and the housing are fixed in register with respect to each other. Because the cap member is connectable to the sensor housing, numerous cap members having different input port orientations are possible, thus providing flexibility of design with respect to the entire sensor assembly.

Abstract: A pressure sensor suitable for sensing low pressure environments. The pressure sensor includes a piezoresistive sensing element enclosed within a protective housing, and utilizes an insert molded into the housing for supporting the sensing element and concentrating stresses within the housing at a maximum distance from the sensing element. The insert is adapted to work in cooperation with a constraint to isolate the sensing element from stresses within the housing, so as to improve the electrical performance of the sensing element to low pressure environments, such as an evaporative emission system of an automobile.