RTD vs Thermocouple
Peb muaj peev xwm txheeb xyuas qhov kub thiab txias hloov ntawm lub hauv paus ntawm peb cov kev nkag siab preceptors. Txawm li cas los xij, peb tsis tuaj yeem qhia qhov tseeb qhov kub thiab txias ntawm ib yam khoom vim peb tsuas tuaj yeem ua qhov ntsuas. Kev ntsuas qhov kub thiab txias yog qhov tsim nyog hauv ntau daim ntawv thov kev lag luam xws li kev tsim cov hlau thiab kev ua zaub mov. Kub sensors tau tsim los qhia qhov sib txawv ntawm qhov kub thiab txias tau yooj yim. RTD thiab thermocouple yog cov sensors uas npog qhov kub thiab txias rau hauv hluav taws xob teeb liab.
RTD yog dab tsi?
RTD stands rau qhov ntsuas kub tsis kam, uas txhais tau hais tias nws ua haujlwm ntawm lub hauv paus ntsiab lus ntawm kev hloov pauv hauv kev tiv thaiv nrog kub. Qhov kev hloov pauv ntawm kev tiv thaiv no tshwm sim nyob rau hauv ib qho kev sib xws nrog kev hloov pauv ntawm qhov kub thiab txias. RTD muaj ib lub caij (coiled hlau) uas yog qhwv ib ncig ntawm ib tug tub ntxhais ua los ntawm iav los yog ceramic. Qhov no yog ua los tiv thaiv cov hlau uas tsis muaj zog hauv qhov xwm txheej. Cov khoom no qhov kev tiv thaiv rau ntau qhov kub thiab txias tau calibrated. Yog li nrog kev pab los ntawm kev nyeem ntawv uas qhia tau hais tias nws tsis kam, nws yog ib qho yooj yim sab saum toj paub qhov kub. RTD muaj kev ntseeg siab heev thaum nws los ntsuas qhov ntsuas kub. Nws yog kim rau nruab tab sis muab cov txiaj ntsig ruaj khov thiab raug lub sijhawm tom qab lub sijhawm. Qee cov ntaub ntawv uas feem ntau siv los ua cov khoom siv los ua RTD yog platinum, tooj liab, npib tsib xee. Qee zaum tungsten thiab balco kuj tau siv.
thermocouple yog dab tsi?
Ib lub thermocouple ua haujlwm ntawm lub hauv paus ntsiab lus tias thaum ob lub hlau sib txawv tau koom ua ke, muaj qhov sib txawv ntawm qhov sib chwv sib txawv ntawm qhov kub thiab txias. Cov alloys uas tau xaiv rau lub hom phiaj ntawm kev sib koom ua ke tau paub thiab sau tseg qhov sib txawv ntawm qhov kub thiab txias. Los ntawm kev nyeem cov voltage, nws yog ib qho yooj yim kom paub qhov kub ntawm ib tug ntaus ntawv. Nyeem thiab tswj qhov kub thiab txias, thermocouples yog siv dav hauv ntau daim ntawv thov kev lag luam. Thermocouples kuj muaj peev xwm hloov cov cua sov rau hauv hluav taws xob. Lawv muaj peev xwm tiv taus ntau qhov kub thiab txias tab sis lawv qhov taw tes qis yog lawv qhov tseeb vim tias lawv tsis tuaj yeem siv rau cov tshuab uas qhov kub sib txawv ntawm tsawg dua ib degree Celsius yuav tsum tau txiav txim siab. Cov alloys uas tiv taus corrosion raug xaiv thaum ua cov thermocouple. Lawv tuaj yeem siv rau hauv qhov xwm txheej uas qhov kub thiab txias yog qhov ntsuas ntsuas tau ua kom deb ntawm qhov system thiab qhov no tuaj yeem ua tau yooj yim nrog kev pab ntawm cov xov hlau txuas ntxiv.
In luv:
RTD vs Thermocouple
• Thaum RTD tuaj yeem rov qab tau yooj yim, thermocouples nyuaj rau recalibrate
• Thermocouple muaj qhov kub ntau (-300 degree F txog 2300 degree F) thaum RTD muaj qhov kub me me (-330 degree F txog 930 degree F)
• Thermocouple pheej yig thaum RTD kim pib
• Rau cov tshuab rugged, thermocouples yog nyiam
• RTD yog qhov tseeb dua li lub thermocouple rau qhov ntsuas kub me me.
