A temperature sensor for use in an industrial process temperature sensor assembly , the sensor comprising: a temperature probe including a temperature sensing device disposed at a temperature probe tip; an adapter surrounding a portion of the temperature probe , the temperature probe being movable within the adapter in a lengthwise direction, the adapter including: a housing connection end for connecting to an electrical housing; a thermowell connection end for connecting to a thermowell; a cavity wall that defines a cavity that extends through a portion of the adapter in an axial direction from the thermowell connection end; a resilient device adapted to produce a force between the adapter and the temperature probe , the force being variable based on a position of the temperature probe within the adapter ; the sensor characterized by a viewing port radially extending through the cavity wall of the adapter through which a portion of the temperature probe within the cavity is visible; and a flame path wall that extends from the cavity toward the housing connection end and which is positioned between the housing connection end and the viewing port; and a visual indicator disposed on a surface of the temperature probe , wherein visibility of the visual indicator through the viewing port corresponds to a desired force produced by the resilient device . a temperature probe including a temperature sensing device disposed at a temperature probe tip; an adapter surrounding a portion of the temperature probe , the temperature probe being movable within the adapter in a lengthwise direction, the adapter including: a housing connection end for connecting to an electrical housing; a thermowell connection end for connecting to a thermowell; a cavity wall that defines a cavity that extends through a portion of the adapter in an axial direction from the thermowell connection end; a resilient device adapted to produce a force between the adapter and the temperature probe , the force being variable based on a position of the temperature probe within the adapter ; the sensor characterized by a viewing port radially extending through the cavity wall of the adapter through which a portion of the temperature probe within the cavity is visible; and a flame path wall that extends from the cavity toward the housing connection end and which is positioned between the housing connection end and the viewing port; and a visual indicator disposed on a surface of the temperature probe , wherein visibility of the visual indicator through the viewing port corresponds to a desired force produced by the resilient device . a housing connection end for connecting to an electrical housing; a thermowell connection end for connecting to a thermowell; a cavity wall that defines a cavity that extends through a portion of the adapter in an axial direction from the thermowell connection end; a resilient device adapted to produce a force between the adapter and the temperature probe , the force being variable based on a position of the temperature probe within the adapter ; the sensor characterized by a viewing port radially extending through the cavity wall of the adapter through which a portion of the temperature probe within the cavity is visible; and a flame path wall that extends from the cavity toward the housing connection end and which is positioned between the housing connection end and the viewing port; and a visual indicator disposed on a surface of the temperature probe , wherein visibility of the visual indicator through the viewing port corresponds to a desired force produced by the resilient device . <EOS>