The thermoelectric force developed by the following junctions up to 2200°C has been measured: RevsW, RevsMo, RevsW‐30Re, and RevsMo‐50Re. The thermoelectric force for WvsW‐30Re and MovsMo‐50Re has been calculated. The RevsW junction develops about 15 mv at 1000°C and may be usable up to 2600°C. RevsMo develops about 17 mv at 1000°C; the thermoelectric power is low above 1600°C. The outputs of RevsW‐30Re and RevsMo‐50Re couples are low and change signs at about 1200 and 1800°C, respectively. The calculated outputs of WvsW‐30Re and MovsMo‐50Re are high; the WvsW‐30Re output is nearly linear over a wide range in temperature, and the thermocouple should be useful to about 2600°C. All of these couples must be used in vacuum or in neutral or reducing atmospheres.