Assemblies, circuits, and methods of transmitters between different equipment protection levels in a hazardous environment

A separation assembly of a transmitter assembly for a hazardous environment, the transmitter assembly including an intrinsically safe circuit, the separation assembly comprising:

• a hermetic seal configured to be electrically connected to a transmitting unit and a probe of the transmitter assembly;
• and
• a nut defining a tunnel sized to receive the hermetic seal therein, wherein the nut has an exterior surface and exterior threads formed on the exterior surface,
• wherein the exterior threads of the nut are complementary to threads on a partition wall positioned between the transmitting unit and the probe, and
• wherein the nut has an interior surface opposite the exterior surface and interior threads formed on the interior surface, the exterior threads and the interior threads sloping in opposite directions.

A method of installing a separation assembly of a transmitter assembly between different equipment protection levels in a hazardous environment, the transmitter assembly including an intrinsically safe circuit, the method comprising:

• providing a hermetic seal and a nut, wherein the hermetic seal is configured to be electrically connected to a transmitting unit and a probe of the transmitter assembly, and
• the nut defines a tunnel sized to receive the hermetic seal therein, wherein the nut has an exterior surface and exterior threads formed on the exterior surface, and the exterior threads of the nut are complementary to threads on a partition wall positioned between the transmitting unit and the probe, and wherein the nut has an interior surface opposite the exterior surface and interior threads formed on the interior surface, the exterior threads and the interior threads sloping in opposite directions;
• coupling the probe with the hermetic seal;
• coupling the hermetic seal with the nut;
• engaging a seal wrench with the hermetic seal;
• engaging a socket wrench with the nut;
• and
• rotating the nut via the socket wrench while holding the hermetic seal stationary via the seal wrench.