Sensor assemblies and methods of making same

A sensor assembly comprising:

• a housing including an internal cavity, a port and a passage providing access from the port to the cavity;
• a sensor package located inside the cavity and including a sensor, a sensor package bottom surface, and a sensor port in the sensor package bottom surface wherein the sensor port provides access to the sensor through the sensor package;
• a bushing with a body having a first end and a second end and a longitudinal axis formed therebetween, the first end forms a top surface and the second end forms a bottom, the bushing further comprising a through hole that extends completely through the bushing along the longitudinal axis, wherein the bushing is made from a material with a thermal conductivity greater than or equal to 375 W/m-K and wherein the top surface of the bushing is coupled to the bottom surface of the sensor package such that the through hole is aligned with the sensor port and the bottom of the bushing extends down into the passage towards the port;
• a coupling with a second body having a third end and a fourth end and a second through hole that extends completely through the coupling from the third end to the fourth end, wherein the coupling is made from a material with a thermal conductivity less than or equal to 25 W/m-K and wherein the coupling is assembled between the bushing and the housing such that the longitudinal axis of the bushing extends down into the second through hole of the coupling and the coupling surrounds the bushing;
• and
• a gasket placed in compression and positioned to force the top surface of the bushing against the sensor package bottom surface.

A sensor assembly comprising:

• a housing including an internal cavity, a port and a passage providing access from the port to the cavity;
• a sensor package located inside the cavity, wherein the sensor package has a sensor package bottom surface and a sensor port in the sensor package bottom surface wherein the sensor port provides access to an interior of the sensor package;
• a bushing having a cylindrically shaped body with a flange at one end and a through hole that runs coaxially along the cylindrically shaped body, wherein the bushing is made from a material with a thermal conductivity greater than or equal to 375 W/m-K and wherein the flange is coupled to the bottom surface of the sensor package such that the through hole is aligned with the sensor port and the cylindrically shaped body extends down into the passage towards the port;
• a coupling having a second cylindrically shaped body with a second flange at one end and a second through hole that runs coaxially along the second cylindrically shaped body, wherein the coupling is made from a material with a thermal conductivity less than or equal to 25 W/m-K and wherein the coupling is assembled between the bushing and the housing such that the cylindrically shaped body of the bushing extends down into the second through hole and the coupling surrounds the cylindrically shaped body of the bushing;
• and
• a gasket placed in compression and positioned to force the top surface of the bushing against the sensor package bottom surface.