The invention relates to rod thermometer device for detecting a temperature, including a plurality of temperature-sensitive elements and a protective sheath having an axis X in which the sensitive elements are partially inserted. \u201d Under the \u201cAssessment\u201d phase, a hospital uses a tool to allow the hospital to fully understand how and whether the present invention should be utilized by it. The sensor assembly may detect a position of an adjuster mechanism, a position of an indicator that may be provided with a slide pin assembly, andor rotation of an operating shaft. These crystal orientations can be selected to match the desired TFT channel orientations for different areas of the device. At this time, light is transmitted from the light-emitting device to the light-receiving device without being dispersed within the light-transmissive resin projection.