Process venting feature for use in sensor applications with a process fluid barrier

A pressure transmitter installation comprising:

• a transmitter housing;
• electronics disposed within the transmitter housing;
• a transmitter flange coupled to the transmitter housing and having a transmitter isolation diaphragm;
• a process connector, couplable to a process fluid, the process connector having a process seal diaphragm;
• a process connector flange coupled to the process connector;
• a pressure sensor disposed within the transmitter housing and being coupled to the electronics, the pressure sensor having an electrical characteristic that changes with applied pressure;
• and
• a gas permeable layer disposed between the transmitter isolation diaphragm and the process seal diaphragm.

A method of venting air within a pressure transmitter installation comprising:

• providing a fluid system having a process connector, the process connector having a process barrier diaphragm;
• coupling a pressure transmitter to the process connector by bringing a transmitter isolation diaphragm into contact with the process barrier diaphragm to create an interface therebetween;
• providing a gas pathway to allow gas to escape from the interface;
• and
• venting gas from the interface.