Dang muaj ob hom sib txawv ntawm neeg xyuas pib los yog semiconductor ib tug, thiab b muaj pes tsawg leeg lub voj, nws xaus kev sib nrig sib kev twb kev txuas Shi, raws li ntev raws li ob pob caus cov ntsiab lus ntawm cov kub sib txawv, kawg kub rau t, hu ua hauj lwm kawg los yog kub kawg, lwm kawg kub rau t0, hu ua free kawg (kuj hais tias siv rau thaum xaus) los yog txias kawg, voj nyob rau hauv qhov yuav tsim ib tug hluav taws xob muaj peev xwm, lub fais peev xwm ntawm cov kev taw qhia thiab loj thiab neeg xyuas pib ntawm cov ntaub ntawv thiab cov ob hu ntawm kub txog. Qhov no tshwm sim yog hu ua "thermoelectric", ob xyuas pib Circuit Court lub npe hu ua "thermocouples", ob tug conductors yog hu ua "tshav kub", lub resulting electromotive dag zog yuam yog hu ua "thermal EMF.
Thermal EMF electromotive quab yuam tsim los ntawm ob tug qhov chaw, ib feem ob-neeg xyuas pib hu electromotive quab yuam, lwm ib feem ntawm lub thermoelectric nyhuv ntawm ib tug tib neeg xyuas pib.
Thermoelectric nyob rau hauv ib tug thermocouple Circuit Court loj, nrog tsuas yog ob tug hu thiab conductors ntawm cov thermocouple khoom kub, thiab muaj tsis muaj dab tsi ua nrog rau qhov zoo thiab loj ntawm lub thermocouple. Thaum lub thermocouple tsau electrode ntaub ntawv rau ob tug, thermal EMF yog ob hlws ris kub t thiab t0. Tsis muaj nuj nqi. Hais tias qhov no kev sib raug zoo tau lug thov nyob rau hauv qhov txias. Khaub thuas kawg-t0-qhov thermocouple thermoelectric kub (ntsuas xaus) hais txog ntawm kev hloov nyob rau hauv kub, namely tej thermoelectric voltage coj mus rau ib tug tej yam kub. Peb mam li cia li siv cov thermoelectric ntsuas txoj kev peev xwm ua tau lub hom phiaj ntawm kev ntsuas.