Abstract: A rotary contactor for use in conjunction with a thermocouple mounted on a container so as to permit measurement of the temperature of the contents at an interior location while the container is being rotated about a longitudinal axis. The rotary contactor device includes a pair of contact pins one of which has an axially projecting portion and which is formed of a metal corresponding to that of one of the thermocouple materials while the other contact pin is formed of a metal corresponding to the dissimilar thermocouple material. A slip ring concentrically embraces a section of the projecting portion of the one pin and is suitably insulated therefrom while being electrically connected to the other pin. The slip ring is formed of the same metal as the pin to which it is electrically connected. A sleeve bearing and a spring-loaded brush are mounted on the slip ring and are formed of the same metal as the slip ring.