Dab tsi yog qhov zoo thiab qhov tsis zoo ntawm portable gas detectors piv rau taag gas detectors?
Gas Detector yog ib qho cuab yeej cuab tam rau kev kuaj pom cov pa roj pa tawm, feem ntau yog xa mus rau lub tshuab hluav taws xob portable / handheld gas detector. Gas sensors feem ntau yog siv los xyuas cov hom roj av uas muaj nyob hauv ib puag ncig. Gas sensors yog cov sensors siv los ntsuas qhov muaj pes tsawg leeg thiab cov ntsiab lus ntawm gases.
Kev faib tawm thiab qhov zoo thiab qhov tsis zoo ntawm cov ntsuas roj
Semiconductor
Nws yog tsim los ntawm kev siv qee cov khoom siv hlau oxide semiconductor, thiab ntawm qhov kub thiab txias, hluav taws xob conductivity hloov nrog kev hloov pauv ntawm cov pa roj ambient. Piv txwv li, lub ntsuas dej cawv tau npaj los ntawm kev siv lub hauv paus ntsiab lus tias qhov kev tiv thaiv ntawm tin dioxide yuav txo qis thaum nws ntsib cov roj cawv ntawm qhov kub thiab txias.
qhov zoo
Semiconductor gas sensors tuaj yeem siv tau zoo rau kev tshawb nrhiav 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. lub sensor muaj tus nqi qis thiab tsim nyog rau cov kev xav tau ntawm kev tshawb nrhiav pej xeem 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, hydrazines). High-quality sensors tuaj yeem ua tau raws li qhov xav tau ntawm kev lag luam tshawb pom.
ua tsis tau
Qhov kev ruaj ntseg tsis zoo, thiab nws muaj kev cuam tshuam loj heev los ntawm ib puag ncig; tshwj xeeb, qhov kev xaiv ntawm txhua lub sensor tsis zoo tag nrho, thiab cov zis tsis tuaj yeem txiav txim siab. Yog li ntawd, nws tsis tsim nyog siv rau hauv qhov chaw uas yuav tsum tau ntsuas kom raug.
combustion
Qhov sensor no npaj cov txheej txheem kub resistant catalyst rau saum npoo ntawm platinum resistor. Ntawm qhov kub thiab txias, cov roj combustible yog catalyzed thiab hlawv rau ntawm nws qhov chaw. Lub combustion yog qhov kub nce ntawm platinum resistor, thiab cov kev hloov pauv hloov. Tus nqi hloov pauv yog qhov concentration ntawm cov roj combustible. muaj nuj nqi.
qhov zoo
Catalytic combustion gas sensors xaiv xaiv cov roj combustible: lub sensor tsis teb rau txhua yam uas tsis yog combustible. Lub catalytic combustion gas sensor muaj qhov ntsuas qhov tseeb, cov lus teb ceev ceev thiab lub neej ua haujlwm ntev. Cov zis ntawm lub sensor yog ncaj qha ntsig txog qhov tawg ntawm qhov chaw muaj kev phom sij, thiab nws yog hom tseem ceeb ntawm lub sensor nyob rau hauv kev tshawb nrhiav kev nyab xeeb.
ua tsis tau
Nyob rau hauv ntau yam ntawm cov nplaim taws, tsis muaj kev xaiv. Muaj kev phom sij ntawm qhov hluav taws kub thiab tawg thaum ua haujlwm nrog hluav taws tsaus. Feem ntau cov organic vapors yog tshuaj lom rau cov sensors.
thermal conductivity pas dej ua ke
Txhua lub roj muaj nws tus kheej tshwj xeeb thermal conductivity. Thaum lub thermal conductivity ntawm ob los yog ntau dua gases txawv heev, lub thermal conductivity caij yuav siv tau los paub qhov txawv cov ntsiab lus ntawm ib qho ntawm cov khoom. Lub sensor no tau siv sensorily rau kev tshawb nrhiav hydrogen, nrhiav pom cov pa roj carbon dioxide, thiab nrhiav kom pom cov methane siab.
