Tsib hom gas detectors
1, Semiconductor hom
Nws yog tsim los siv lub hauv paus ntsiab lus uas cov conductivity ntawm ib co hlau oxide semiconductor cov ntaub ntawv hloov nrog cov muaj pes tsawg leeg ntawm ambient gas ntawm ib tug tej yam kub. Piv txwv li, lub ntsuas dej cawv tau npaj raws li lub hauv paus ntsiab lus uas thaum tin dioxide ntsib cov roj cawv ntawm qhov kub thiab txias, nws qhov kev tiv thaiv yuav txo qis heev.
qhov zoo
Semiconductor gas sensors tuaj yeem siv tau zoo los kuaj xyuas ntau cov pa roj xws li methane, ethane, propane, butane, cawv, formaldehyde, carbon monoxide, carbon dioxide, ethylene, acetylene, vinyl chloride, styrene, acrylic acid, thiab lwm yam. tshwj xeeb tshaj yog, hom no. sensor yog tus nqi qis thiab tsim nyog rau cov kev xav tau ntawm kev tshawb nrhiav cov pa roj. Cov khoom siv hluav taws xob hauv qab no tau ua tiav: methane (natural gas, biogas), cawv, carbon monoxide (lub nroog gas), hydrogen sulfide, ammonia (xws li amines thiab hydrazine). Cov sensors zoo tuaj yeem ua tau raws li qhov xav tau ntawm kev sim kev lag luam.
ua tsis tau
Kev ruaj ntseg tsis zoo thiab cuam tshuam ib puag ncig tseem ceeb; Tshwj xeeb tshaj yog, qhov kev xaiv ntawm txhua lub sensor tsis txwv rau ib qho, thiab cov zis tsis tuaj yeem txiav txim siab. Yog li ntawd, nws tsis haum rau qhov chaw uas xav tau kev ntsuas kom raug.
2, combustion hom
Hom sensor no yog npaj nrog lub siab kub resistant txheej catalyst rau saum npoo ntawm platinum resistor. Ntawm qhov kub thiab txias, combustible gases catalyze combustion ntawm nws nto. combustion yog ib qho kev ua haujlwm ntawm cov concentration ntawm cov roj combustible raws li qhov kub thiab txias ntawm platinum resistor nce thiab qhov kev hloov pauv.
qhov zoo
Catalytic combustion gas sensors xaiv xaiv cov roj combustible: txhua yam uas tsis tuaj yeem hlawv tsis muaj lus teb los ntawm lub sensor. Catalytic combustion gas sensors muaj qhov ntsuas qhov tseeb, teb ceev ceev, thiab lub neej ntev. Cov zis ntawm cov sensors yog ncaj qha ntsig txog kev tawg ntawm ib puag ncig thiab yog ib hom tseem ceeb ntawm sensors hauv kev tshawb nrhiav kev nyab xeeb.
ua tsis tau
Nyob rau hauv qhov ntau ntawm cov nplaim taws, tsis muaj kev xaiv. Ua haujlwm hauv qhov chaw tsaus ntuj ua rau muaj kev pheej hmoo ntawm hluav taws kub thiab tawg. Feem ntau cov organic vapors muaj cov tshuaj lom rau cov sensors.
3, Thermal conductivity pas dej ua ke
Txhua cov roj muaj nws tus kheej cov thermal conductivity, thiab thaum muaj qhov sib txawv ntawm thermal conductivity ntawm ob los yog ntau dua gases, lub thermal conductivity tuaj yeem siv los txheeb xyuas cov ntsiab lus ntawm ib feem. Hom sensor no tau dav siv los kuaj xyuas hydrogen, carbon dioxide, thiab siab concentration methane. Qhov no gas sensor muaj ib tug nqaim daim ntawv thov ntau yam thiab ntau yam limiting yam.
4, Electrochemical formula
Ib feem tseem ceeb ntawm nws cov nplaim taws, muaj kuab lom, thiab cov pa phem muaj cov khoom siv hluav taws xob thiab tuaj yeem ua rau electrochemically oxidized lossis txo. Los ntawm kev siv cov tshuaj tiv thaiv no, cov roj muaj pes tsawg leeg tuaj yeem paub qhov txawv thiab cov roj concentration tuaj yeem kuaj pom. Electrochemical gas sensors muab faib ua ntau pawg
5, Infrared hluav taws xob
Feem ntau cov pa roj muaj cov yam ntxwv nqus siab siab hauv nruab nrab thaj tsam infrared. Los ntawm kev txheeb xyuas qhov teeb meem ntawm qhov nqus ntawm cov yam ntxwv nqus qhov siab tshaj plaws txoj haujlwm, qhov concentration ntawm qee yam roj tuaj yeem txiav txim siab.
