Hom thermocouple twg yog qhov zoo tshaj plaws rau kev saib xyuas qhov kub thiab txias?

Thaum nws cuam tshuam txog kev taug qab qhov cub kub ntau dhau, ntau hom thermocouples muaj lawv tus kheej qhov zoo, txawm li cas los xij ob peb sawv tawm rau qhov tseeb.
Hom B thermocouples, muaj xws li platinum thiab rhodium alloys, feem ntau yog cov neeg sib tw ruaj khov. Lawv tuaj yeem tiv taus qhov kub thiab txias heev, feem ntau tshaj 1800 degree, ua rau lawv tsim nyog rau cov cheeb tsam niaj hnub tshaj plaws hauv qhov cub. Lawv qhov sib npaug thiab qhov tseeb ntawm qhov ntsuas kub ntau yog qhuas.
Hom R thiab Hom S thermocouples, ntxiv rau crafted los ntawm platinum alloys, muab zoo heev lub sij hawm ntev sib npaug thiab sib piv ntau tshaj qhov tseeb. Lawv muaj kev vam khom rau qhov ntsuas kub tsis tu ncua nyob rau lub sijhawm ntev, uas yog qhov tseem ceeb hauv kev ua lag luam rau kev ua haujlwm hauv qhov kev tswj hwm tshwj xeeb yog qhov tseem ceeb.
Hom K thermocouples, ua los ntawm chromel thiab alumel, yog qhov kev nyiam nto moo vim lawv qhov kub thiab txias ntau yam thiab sib piv tus nqi qis. Thaum tam sim no tsis muaj peev xwm ua kom tau qhov kub zoo tshaj plaws vim tias cov platinum feem ntau raws li txhua yam, lawv muaj peev xwm ua tau zoo nyob rau hauv ntau qhov kev pab cuam cub tawg ntau npaum li puag ncig 1250 degree.
Txawm li cas los xij, kev xaiv yog nyob ntawm ntau yam. Yog tias lub qhov cub ua haujlwm ntawm qhov kub thiab txias heev, cov platinum feem ntau yog raws li txhua yam xws li B, R, thiab S yog qhov xav tau rau nws qhov kev ua tau zoo tag nrho thiab sib npaug ntawm cov mob hnyav. Tab sis yog tias tus nqi yog qhov loj me me thiab qhov kub thiab txias ntau yam nyob rau hauv lub peev xwm ntawm Hom K, nws tuaj yeem yog qhov kev xaiv zoo.
Qhov chaw nyob ib puag ncig hauv lub cub tawg kuj ua lub luag haujlwm. Yog tias muaj corrosive gases los yog cov ntaub ntawv tam sim no, cov ntaub ntawv muaj pes tsawg leeg ntawm cov thermocouple xav kom muaj kev tiv thaiv rau cov xwm txheej zoo li no. Tsis tas li ntawd, lub sijhawm tshuaj tiv thaiv thiab qhov xav tau rau kev rov ua kom rov zoo tuaj yeem cuam tshuam rau kev xaiv.
Qee zaum, kev sib xyaw ntawm ntau hom thermocouples yog siv nyob rau hauv lub qhov cub tsis sib yuav los nthuav qhia cov cheeb tsam tshwj xeeb lossis muab kev rov ua dua thiab kev ntsuas kev ntsuas.