Sensors feem ntau siv hauv kev tshawb nrhiav roj
Qhov tseem ceeb tshaj plaws ntawm lub ntsuas roj yog qhov ntsuas roj, uas txawv raws li cov qauv ntsuas roj sib txawv. Cov pa hluav taws xob muaj xws li PID photoionization sensors, infrared sensors, electrochemical sensors, catalytic combustion sensors, thiab semiconductor sensors. Hauv qab no, Honeyegg Technology yuav muab koj cov ncauj lus kom ntxaws txog cov qauv kev ua haujlwm thiab qhov zoo thiab qhov tsis zoo ntawm txhua lub sensor.
1, Txoj Cai Infrared ntawm Gas Detectors
Lub hauv paus ntsiab lus: Non dispersive infrared hauv paus ntsiab lus: NDIR sensors siv Beer Lambert infrared absorption txoj cai, uas txhais tau hais tias cov roj sib txawv nqus lub teeb ntawm ib lub wavelength tshwj xeeb, thiab qhov kev siv zog ntawm kev nqus yog ncaj qha proportional rau cov concentration ntawm cov pa kom ua tiav kev tshawb pom. Nws yog daim ntawv thov ntawm lub lim los faib lub teeb infrared rau hauv ib pawg me me ntawm cov kab spectral uas yuav tsum tau ua, thiab cov roj pom tau nqus cov kab me me ntawm cov kab spectral.
Qhov zoo: Kev ntseeg siab, kev xaiv zoo, qhov tseeb siab, tsis muaj tshuaj lom, tsis muaj kev cuam tshuam ib puag ncig, lub neej ntev, thiab tsis muaj kev vam khom rau oxygen.
Disadvantages: Nws muaj kev cuam tshuam zoo heev los ntawm cov av noo thiab muaj kev txwv tsis pub tshawb pom cov roj hom. Tam sim no, nws tsuas yog siv rau cov pa roj xws li methane, carbon dioxide, carbon monoxide, sulfur hexafluoride, sulfur dioxide, thiab hydrocarbons.
2, Semiconductor Cov Ntsiab Cai ntawm Cov Hluav Taws Xob Hluav Taws Xob
Lub hauv paus ntsiab lus: Semiconductor gas sensors yog tsim los siv lub hauv paus ntsiab lus hais tias qhov kev tiv thaiv ntawm ib co hlau oxide semiconductor cov ntaub ntawv hloov nrog cov muaj pes tsawg leeg ntawm ib puag ncig cov pa roj ntawm ib tug tej yam kub. Piv txwv li, lub ntsuas dej cawv tau npaj siv lub hauv paus ntsiab lus tias thaum tin dioxide ntsib cov pa roj cawv ntawm qhov kub siab, nws qhov tsis kam yuav txo qis.
Qhov zoo: Nws muaj qhov zoo ntawm tus nqi qis, kev tsim khoom yooj yim, siab rhiab heev, cov lus teb ceev ceev, kev pab cuam lub neej ntev, tsis tshua muaj rhiab heev rau cov av noo, thiab yooj yim Circuit Court.
Disadvantages: Tsis zoo stability, zoo heev cuam tshuam los ntawm ib puag ncig yam, tshwj xeeb tshaj yog cov xaiv ntawm txhua tus sensor tsis yog tshwj xeeb, thiab cov zis tsis tau txiav txim. Yog li ntawd, nws tsis haum rau siv nyob rau hauv qhov chaw uas yuav tsum tau ntsuas qhov tseeb, tab sis feem ntau yog siv rau pej xeem siv.
3, Lub hauv paus ntsiab lus ntawm catalytic combustion nyob rau hauv gas detectors
Lub hauv paus ntsiab lus: Lub catalytic combustion sensor yog cov txheej txheem kub-resistant catalyst npaj rau saum npoo ntawm platinum resistor. Ntawm qhov kub thiab txias, combustible gases catalyze combustion ntawm nws nto, ua rau lub platinum resistor kub nce thiab tsis kam hloov. Kev hloov pauv hauv kev ua haujlwm yog qhov ua haujlwm ntawm qhov concentration ntawm cov roj hluav taws xob.
Qhov zoo: Lub catalytic combustion gas sensor xaiv pom cov roj combustible: txhua yam uas tsis tuaj yeem hlawv tsis muaj lus teb los ntawm lub sensor. Cov lus teb ceev ceev, lub neej ntev, thiab cuam tshuam tsawg dua los ntawm qhov kub thiab txias, av noo, thiab siab. Cov zis ntawm cov sensors yog ncaj qha ntsig txog kev tawg ntawm ib puag ncig, thiab lawv yog hom tseem ceeb ntawm sensors hauv kev tshawb nrhiav kev nyab xeeb.
Disadvantage: Nyob rau hauv lub combustible gases, tsis muaj selectivity. Sensors yog nquag lom, thiab feem ntau cov organic vapors tuaj yeem muaj tshuaj lom rau cov sensors.
Lus Cim: Qhov ua tau ntawm kev kuaj xyuas catalytic combustion yog qhov tsim nyog thiab nws yog qhov tsim nyog los xyuas kom meej tias qhov chaw kuaj pom muaj cov pa oxygen txaus. Nyob rau hauv ib puag ncig anaerobic, txoj kev tshawb nrhiav no yuav tsis tuaj yeem ntes tau cov pa hluav taws xob. Qee cov khoom siv lead ua (tshwj xeeb tshaj yog tetraethyl lead), sulfur compounds, silicon compounds, phosphorus compounds, hydrogen sulfide, thiab halogenated hydrocarbons tuaj yeem ua rau muaj kev phom sij los yog inhibition.
4, PID lub hauv paus ntsiab lus ntawm cov roj ntes
Lub hauv paus ntsiab lus: PID muaj UV teeb lub teeb qhov chaw thiab lub ion chamber, uas muaj qhov zoo thiab tsis zoo electrodes los ua ib qho hluav taws xob. Nyob rau hauv irradiation ntawm lub teeb UV, cov roj yuav tsum tau ntsuas ionizes los tsim cov ions zoo thiab tsis zoo, uas tom qab ntawd tsim ib qho tam sim no ntawm cov electrodes. Amplified tso zis teeb liab
Qhov zoo: siab rhiab heev, tsis muaj teeb meem lom.
Qhov tsis zoo: Tsis muaj kev xaiv, cuam tshuam zoo heev los ntawm cov av noo, luv luv lub neej ntawm UV teeb, thiab tus nqi siab.
5, Electrochemical cov ntsiab cai ntawm cov roj ntes
Lub hauv paus ntsiab lus: Nws ua hauj lwm los ntawm reacting nrog lub hom phiaj roj los ntawm cov electrolyte nyob rau hauv lub sensor thiab tsim ib tug hluav taws xob teeb liab proportional rau cov roj concentration.
Qhov zoo: dav ua hauj lwm kub ntau, ntau yam, siab rhiab heev, linear output, zoo selectivity
Disadvantages: Short lifespan, txwv lub sij hawm cia, luv lifespan nyob rau hauv tsis tshua muaj qhuav los yog siab concentration gas ib puag ncig, tsis yog tshwj xeeb, yooj yim cuam tshuam, av noo cuam tshuam qhov tseeb.
Lus Cim: Feem ntau cov pa roj carbon monoxide yuav tsum muaj cov pa me me kom tswj tau qhov kev ua haujlwm zoo. Muaj lub qhov cua nyob rau sab nraum qab ntawm lub sensor kom ua tiav lub hom phiaj no. Cov av noo siab thiab drought siab tuaj yeem cuam tshuam rau lub neej ntawm cov sensors. Kev hloov siab sai sai tuaj yeem ua rau lub sijhawm hloov pauv hloov pauv lossis ncav cuag lub tswb tsis tseeb.
