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<p>A new high temperature gauge to simultaneously determine the electrical conductivity, the Hall constant, and the Seebeck coefficient has been developed. Screen-printed heating structures on a ceramic sample holder are used to generate temperatures up to 800 <span class="inline-formula">^∘</span>C by Joule heating. The heating structures were designed using the finite element method (FEM) simulations and the temperature distribution was validated by thermal imaging. To measure the Seebeck coefficient, <span class="inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" id="M3" display="inline" overflow="scroll" dspmath="mathml"><mrow class="chem"><mi mathvariant="normal">Au</mi><mo>/</mo><mi mathvariant="normal">Pt</mi></mrow></math><span><svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="32pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="782f709c492b2ec522293ebc1c9ea812"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="jsss-12-69-2023-ie00001.svg" width="32pt" height="14pt" src="jsss-12-69-2023-ie00001.png"/></svg:svg></span></span> thermocouples with different geometries were investigated and successfully integrated into the gauge. Measurements on constantan, a typical Seebeck coefficient reference material with high electrical conductivity, high charge carrier concentration, and a known Seebeck coefficient, as well as on a well-described boron-doped silicon wafer confirm the functionality of the gauge up to 800 <span class="inline-formula">^∘</span>C.</p>