A non-contact temperature measuring system comprising a dual-reference body structure (5) is used to measure the temperature of a moving object (15). The moving object (15) is passed by first (20) and second (30) reference bodies having a same form factor with respect to the object (15). Each of the reference bodies (20, 30) has a heat flow sensor (40, 50) embedded at the end of a cavity (43, 53) formed in the reference body (20, 30) such that the heat flow sensor (40, 50) primarily responds to radiation heat flow generated by a temperature differential between the object (15) and its respective reference body (40, 50). With the reference bodies (20, 30) thermally isolated and maintained at different temperatures by heaters (60, 90) embedded in the reference bodies (20, 30), and their respective heat flow sensors (40, 50) properly calibrated, the temperature of the object (15) is calculated by applying the Stefan-Boltzman law.
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