| http://www.w3.org/ns/prov#value | - The transmitter of claim 11 and further comprising:a header joined to the distal end of the plug to form a sensor cavity holding the sensor and receiving the process pressure from the first passageway, the header including a third passageway for carrying atmospheric pressure to the sensor; and a ring member joined to the isolator plug and the header and forming a recess opening to the second passa
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