This PDF file includes:

• Calculating thermoelectric flux
• Thermometry
• Fig. S1. Conversion of currents at the interface between two superconductors, S and S', with different energy gaps, Δ and Δ′.
• Fig. S2. Calculated dependence of the thermoelectric flux scaling factors on the quasiparticle temperature normalized to critical temperature, T_c.
• Fig. S3. Calculated temperature dependence of thermoelectric flux, Φ_th, normalized to its value, Φ_th(T_c), at critical temperature with different values of critical current, I₀, and electron-phonon parameter, n.
• Fig. S4. Dependence of critical current in the SNS thermometer on the length of the normal element at base temperature T = 245 mK.
• Fig. S5. Differential resistance versus bias current curves for an SNS thermometer at different bath temperatures.
• Fig. S6. Differential resistance versus bias current curves for an SNS thermometer at different heater currents.
• Fig. S7. Temperature calibration curve.
• Fig. S8. Determination of the heater current corresponding to the onset of superconductivity in the bimetallic loop.
• Reference (34)

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