Patent ID: 6935182

Claim:
A pressure sensor apparatus for testing a device under test, the pressure sensor apparatus comprising: a plurality of hollow stems, each of which includes: a diaphragm that is arranged in a first end of the stem; a strain measuring arrangement that is arranged in the first end of the stem to measure strain on the diaphragm; and an opening that is provided through an end surface of a second end of the stem, which is opposite to the first end, to introduce pressure to the diaphragm; a housing that includes a plurality of stem receiving through holes, each of which extends through the housing from a first side of the housing to a second side of the housing that is opposite to the first side of the housing, wherein each stem receiving through hole receives a corresponding one of the plurality of stems; and a plurality of seal members, each of which is arranged in a corresponding one of the stem receiving through holes such that each seal member is placed adjacent the end surface of the second end of the corresponding stem, wherein: each stem is received and is detachably secured in the corresponding stem receiving through hole such that the first end of the stem, which includes the diaphragm, is exposed on the first side of the housing, and the second end of the stem, which includes the opening, is exposed on the second side of the housing; the end surface of the second end of each stem is received in the corresponding stem receiving through hole such that the end surface of the second end of the stem is axially inwardly spaced apart from a surface of the second side of the housing; and when the plurality of stems and the housing are integrally installed over the device under test, each seal member seals between the end surface of the second end of the corresponding stem and the device under test.