Cosinuss° Sensor has components cosinuss instant a charging station for the sensor and a disposible cap for the hygienic use sensor new parameter more decisive determination of physical activity the new cosinuss sensor technology enables for the first time not only the mobile, continuous and convenient monitoring of pulse frequency but also of body core temperature of sportsmen. The new cosinuss Sensor enables on the mobile and convenient measurement of heart rate and body core temperature and the possibility to transmit the values to a smartphone A convenient alternative to the pulse chest belt in the field of sports is provided. In combination with the pulse frequency it can provide a more decisive determination of physical activity than it was possible until know. The body core temperature is a very important physiological parameter that can give decisive information about the well being and the health of humans. It is simple to utilize.