Circular snap fit pressure sensor unit

An apparatus comprising:

• a base assembly having a locking feature and a bearing feature, wherein said locking feature has a first passage in communication with an exterior of said apparatus;
• a mounting assembly having an opening configured to receive said locking feature to secure said base assembly to said mounting assembly;
• a gasket mounted on said base assembly and having (i) a compression region, (ii) a central region and (iii) a second passage in communication with said first passage;
• and
• a housing assembly having a sealing feature and configured to hold a sensor, wherein (i) said sealing feature (a) mates with said bearing feature and (b) compresses said gasket in said compression region and (ii) said sensor (a) seals to said central region of said gasket and (b) is in communication with said exterior of said apparatus through said first passage and said second passage.