Field device assembly including improved dielectric insulation system

A dielectric insulation system including a bolt spacer configured for insertion into a bore comprising:

• a sleeve portion;
• a shoulder portion attached to an end of the sleeve portion, the shoulder portion having a diameter that is larger than an exterior diameter of the sleeve portion;
• and
• a dielectric layer including one of:
• a ceramic body, wherein the sleeve portion and the shoulder portion comprise the ceramic body;
• a ceramic material overmolded with a plastic material, wherein the shoulder portion comprises the ceramic material overmolded with the plastic material;
• a metal body having an anodized exterior surface, wherein the sleeve portion and the shoulder portion comprise the metal body;
• a metal body having a ceramic coating on an exterior surface of the metal body, wherein the sleeve portion and the shoulder portion comprise the metal body;
• a metal body overmolded with a plastic material, wherein the shoulder portion comprises the metal body overmolded with the plastic material;
• and
• a metal body overmolded with a plastic material, wherein the sleeve portion and the shoulder portion comprise the metal body overmolded with the plastic material.

A field device assembly comprising:

• an industrial process field device comprising:
• a pressure sensor;
• and
• a housing containing the pressure sensor and comprising a base including a base interface having a first base process opening;
• a flange attached to the base of the housing and including a flange interface having a first flange process opening, wherein a pressure at the first flange process opening is communicated to the pressure sensor through the first base process opening;
• a gasket including a first gasket process opening aligned with the first base process opening and the first flange process opening, a first surface engaging the base interface, and a second surface that is opposite the first surface engaging the flange interface;
• and
• a dielectric insulation system comprising at least one dielectric layer that insulates the housing from electrical currents conducted through the flange, each of the at least one dielectric layer comprising:
• a layer of ceramic material;
• and/or
• an anodized layer,
• wherein one of the at least one dielectric layer includes the layer of ceramic material overmolded with a plastic material.