Lub thermocouple sensor yog lub ntsuas kub ntsuas uas ua haujlwm raws li lub hauv paus ntsiab lus ntawm Seebeck nyhuv. Nws muaj ob qhov sib txawv ntawm cov hlau hlau sib txuas ua ke ntawm ib qho kawg, tsim ib qho kev sib tshuam. Lwm qhov kawg ntawm cov xov hlau txuas nrog lub ntsuas ntsuas lossis tswj qhov system.

Thaum qhov kev sib txuas nkag mus rau qhov kub thiab txias, qhov hluav taws xob hluav taws xob (EMF) lossis hluav taws xob raug tsim tawm. Qhov hluav taws xob no yog proportional rau qhov kub thiab txias sib txawv ntawm qhov kev sib tshuam ntawm qhov kev sib tshuam thiab kev siv hlws ris (lub ntsiab lus ntawm qhov kub thiab txias).

Ob hom thermocouples feem ntau yog:

1.Base-metal thermocouples: Cov thermocouples no yog ua los ntawm cov hlau tsis tshua muaj xws li hlau, tooj liab, lossis npib tsib xee. Piv txwv xws li Hom K (Chromel / Alumel), Hom J (Iron / Constantan), thiab Hom T (Copper / Constantan). Base-hlau thermocouples yog tsim rau ntau qhov kub thiab txias, txij li -200 degree txog 1000 degree (-328 degree F txog 1832 degree F).

2.Noble-hlau thermocouples: Cov thermocouples no yog ua los ntawm cov hlau zoo li platinum thiab rhodium. Piv txwv xws li Hom R (Platinum / Rhodium), Hom S (Platinum / Rhodium), thiab Hom B (Platinum / Rhodium-Iridium). Noble-hlau thermocouples muaj peev xwm ntsuas qhov kub thiab txias, feem ntau mus txog 1800 degree (3272 degree F) rau hom B.

Thermocouples muaj ntau yam zoo, nrog rau qhov kub thiab txias, lub sij hawm teb ceev ceev, thiab kav ntev. Lawv feem ntau siv nyob rau hauv ntau yam lag luam, suav nrog HVAC, cov txheej txheem kev lag luam, tsheb, thiab kev tshawb fawb tshawb fawb.

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