Thermocouple yog ib qho kev ntsuas kub uas feem ntau siv hauv cov ntsuas kub. Nws ncaj qha ntsuas qhov ntsuas kub thiab hloov cov cim ntsuas kub rau hauv cov cim ntsuas hluav taws xob, uas tom qab ntawd hloov mus rau qhov kub ntawm qhov ntsuas nruab nrab los ntawm cov cuab yeej hluav taws xob (cov cuab yeej thib ob). Cov tsos ntawm ntau yam thermocouples feem ntau sib txawv vim qhov xav tau, tab sis lawv cov qauv yooj yim yog qhov zoo ib yam. Lawv feem ntau yog tsim los ntawm cov khoom tseem ceeb xws li kub electrodes, insulating lub tes tsho tiv thaiv raj thiab hlws ris lub thawv, thiab feem ntau yog siv ua ke nrog cov cuab yeej tso saib, kaw cov twj paj nruag thiab hluav taws xob regulators.
Nyob rau hauv cov txheej txheem kev tsim khoom, qhov kub thiab txias yog ib qho tseem ceeb ntawm kev ntsuas thiab tswj. Hauv kev ntsuas kub, thermocouples tau dav siv. Lawv muaj ntau yam zoo xws li cov qauv yooj yim, kev tsim khoom yooj yim, kev ntsuas dav dav, qhov tseeb siab, me me inertia thiab yooj yim kis tau tus mob ntawm cov teeb liab tawm. Tsis tas li ntawd, txij li cov thermocouples yog passive sensors, lawv tsis tas yuav muaj hluav taws xob sab nraud thaum ntsuas thiab siv tau yooj yim heev. Yog li ntawd, lawv feem ntau siv los ntsuas qhov ntsuas kub ntawm cov pa roj los yog kua hauv qhov cub thiab cov kav dej thiab qhov kub thiab txias ntawm cov khib nyiab.