Dab tsi yog qhov zoo thiab qhov tsis zoo ntawm ntau hom roj sensors?
Tam sim no, cov roj sensors siv tau muab faib ua peb pawg: semiconductor, thermal conductivity pas dej ua ke, thiab catalytic combustion. Lawv cov qauv kev ua haujlwm txawv thiab lawv cov yam ntxwv ua haujlwm muaj qhov zoo. Ntau cov pa roj sensors muaj lawv tus kheej daim ntawv thov kev lag luam, thiab lawv kuj muaj kev sib raug zoo thiab sib koom ua ke. Txog rau qhov kawg no, tus editor ntawm Gongcai Network yuav teeb tsa lawv qhov kev ua tau zoo thiab qhov tsis muaj zog, kom txhua tus tuaj yeem nkag siab zoo dua qhov zoo thiab qhov tsis zoo ntawm ntau hom roj sensors!
Hom semiconductor
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 ib puag ncig roj ntawm ib tug tej yam kub thiab txias. 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
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 roj av. Cov khoom siv hluav taws xob semiconductor hauv qab no tau ua tiav: methane (natural gas, biogas), cawv, carbon monoxide (lub nroog gas), hydrogen sulfide, ammonia (xws li amines, 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 yog qhov tshwj xeeb, thiab cov zis tsis tuaj yeem txiav txim siab. Yog li ntawd, nws tsis haum rau siv nyob rau hauv qhov chaw uas yuav tsum tau ntsuas kom raug.
Catalytic combustion hom
Hom sensor no yog cov txheej txheem kub-resistant catalyst txheej npaj 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 qhov concentration ntawm cov pa roj carbon monoxide thaum lub platinum resistor kub nce thiab qhov hloov pauv hloov.
qhov zoo
Catalytic combustion gas sensors xaiv xaiv cov roj combustible: txawm tias tsis tuaj yeem hlawv, lub sensor tsis muaj lus teb. Lub catalytic combustion gas sensor muaj qhov ntsuas qhov tseeb, cov lus teb ceev ceev, thiab lub neej ua haujlwm ntev. 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.
ua tsis tau
Nyob rau hauv ntau yam ntawm combustible gases, tsis muaj selectivity. Ua haujlwm hauv qhov hluav taws kub tsaus ua rau muaj kev pheej hmoo ntawm hluav taws kub thiab tawg. Feem ntau cov ntsiab lus organic vapors muaj tshuaj lom rau ntawm cov sensors.
Thermal conductivity pas dej ua ke
Txhua lub roj muaj nws tus kheej tshwj xeeb thermal conductivity. Thaum muaj qhov sib txawv tseem ceeb hauv thermal conductivity ntawm ob los yog ntau dua gases, lub thermal conductivity tuaj yeem siv los paub qhov txawv cov ntsiab lus ntawm ib feem. Hom sensor no tau dav siv rau kev tshawb nrhiav hydrogen, carbon dioxide, thiab siab concentration methane.
Hom roj sensor no muaj ib daim ntawv thov nqaim thiab ntau yam txwv.
Gas detector yog ib qho cuab yeej cuab tam rau kev soj ntsuam cov roj to concentration, feem ntau xa mus rau portable / handheld gas detectors. Feem ntau yog siv cov pa roj sensors los xyuas cov hom gases tam sim no nyob rau hauv ib puag ncig, roj sensors yog cov sensors siv los xyuas cov muaj pes tsawg leeg thiab cov ntsiab lus ntawm gases.
