Abstract: A temperature sensor probe is provided with a series of flow channels for deflecting a fluid to be sensed as it flows over the surface of the probe. The flow channels reduce the separation of flow from the surface of the probe thereby increasing the convective heat transfer of the probe and improving the time response of the probe. The temperature sensor probe includes a temperature sensing element housed in a probe housing. In channels are formed on the outer surface of the probe housing. In the preferred form of the invention, the housing is cylindrically shaped and the flow channels extend around the entire circumference of the housing in a spiral fashion so as to form a helical shape extending substantially the entire length of the probe housing.