Isolated single-wire temperature sensor

The invention provides an isolated single-wire temperature sensor. A system for determining temperature includes a housing having an interior cavity defined by a conductive wall, where the conductive wall has an interior surface exposed to the interior cavity and an exterior surface opposite the interior surface, and a single sensor feedthrough defined from the interior surface to the exterior surface. The system also includes a temperature sensor mounted to the inner surface, the temperature sensor including an isolated single wire extending from the sensor to the outer surface via the single sensor feedthrough hole. The conductive wall provides a first voltage signal to an electronic device in response to a temperature change within the cavity, and the isolated single wire provides a second voltage signal different from the first voltage signal to the electronic device in response to the temperature change within the cavity, the electronic device is caused to determine a lumen temperature based on a signal