A temperature sensor comprising: a thermally insulative polymer body (14, 94, 112, 126) defining at least one lead channel (37A, 37B, 63A, 63B) and comprising: a connector portion (16, 46) at a proximal end of the polymer body (14, 94, 112, 126); a terminal protrusion (22, 52, 96, 114, 128) disposed at a distal end of the polymer body (14, 94, 112, 126); a flange (18, 48) disposed between the proximal end and the distal end of the polymer body (14, 94, 112, 126), wherein the flange (18, 48) is configured to mate with an assembly tool; and a fixation surface (20, 50) disposed between the flange (18, 48) and the distal end of the polymer body (14, 94, 112, 126); at least one lead conductor (36A, 36B, 62A, 62B) disposed within the at least one lead channel; a temperature sensing element (26, 56) electrically coupled to the at least one lead conductor (36A, 36B, 62A, 62B) and configured to detect a temperature of a fluid, wherein the temperature sensing element is disposed distal of the terminal protrusion; and a thermally conductive cap (24, 54, 98, 116, 130) disposed distal of the fixation surface of the polymer body (14, 94, 112, 126) and over the temperature sensing element (26, 56) and at least a portion of the terminal protrusion (22, 52, 96, 114, 128), wherein the thermally conductive cap (24, 54, 98, 116, 130) is configured to seal the temperature sensing element (26, 56) from the fluid, wherein the thermally conductive cap (24, 54, 98, 116, 130) comprises layers with thermally conductive material disposed between the layers, wherein the layers are configured to withstand pressures of the fluid, wherein the thermally conductive material is configured to conduct thermal energy from the fluid to the temperature sensing element (26, 56). a thermally insulative polymer body (14, 94, 112, 126) defining at least one lead channel (37A, 37B, 63A, 63B) and comprising: a connector portion (16, 46) at a proximal end of the polymer body (14, 94, 112, 126); a terminal protrusion (22, 52, 96, 114, 128) disposed at a distal end of the polymer body (14, 94, 112, 126); a flange (18, 48) disposed between the proximal end and the distal end of the polymer body (14, 94, 112, 126), wherein the flange (18, 48) is configured to mate with an assembly tool; and a fixation surface (20, 50) disposed between the flange (18, 48) and the distal end of the polymer body (14, 94, 112, 126); a connector portion (16, 46) at a proximal end of the polymer body (14, 94, 112, 126); a terminal protrusion (22, 52, 96, 114, 128) disposed at a distal end of the polymer body (14, 94, 112, 126); a flange (18, 48) disposed between the proximal end and the distal end of the polymer body (14, 94, 112, 126), wherein the flange (18, 48) is configured to mate with an assembly tool; and a fixation surface (20, 50) disposed between the flange (18, 48) and the distal end of the polymer body (14, 94, 112, 126); at least one lead conductor (36A, 36B, 62A, 62B) disposed within the at least one lead channel; a temperature sensing element (26, 56) electrically coupled to the at least one lead conductor (36A, 36B, 62A, 62B) and configured to detect a temperature of a fluid, wherein the temperature sensing element is disposed distal of the terminal protrusion; and a thermally conductive cap (24, 54, 98, 116, 130) disposed distal of the fixation surface of the polymer body (14, 94, 112, 126) and over the temperature sensing element (26, 56) and at least a portion of the terminal protrusion (22, 52, 96, 114, 128), wherein the thermally conductive cap (24, 54, 98, 116, 130) is configured to seal the temperature sensing element (26, 56) from the fluid, wherein the thermally conductive cap (24, 54, 98, 116, 130) comprises layers with thermally conductive material disposed between the layers, wherein the layers are configured to withstand pressures of the fluid, wherein the thermally conductive material is configured to conduct thermal energy from the fluid to the temperature sensing element (26, 56).