Txhim kho thiab ncua lub neej sensor
Gas detector yog ib qho cuab yeej cuab tam rau kev soj ntsuam roj to concentration, uas muaj xws li portable gas detectors, handheld gas detectors, fixed gas detectors, online gas detectors, thiab lwm yam. Feem ntau siv roj sensors los xyuas cov hom gases tam sim no nyob rau hauv ib puag ncig, roj sensors yog sensors siv los xyuas qhov muaj pes tsawg leeg thiab cov ntsiab lus ntawm gases.
Nws yog feem ntau ntseeg hais tias lub ntsiab lus ntawm cov pa sensors yog raws li kev faib tawm ntawm kev tshawb nrhiav lub hom phiaj, uas txhais tau hais tias txhua lub sensor siv los ntsuas cov roj muaj pes tsawg leeg thiab concentration yog hu ua roj sensor, txawm tias nws yog siv lub cev lossis tshuaj. Piv txwv li, cov sensors uas ntes cov roj ntws tsis suav tias yog cov roj hluav taws xob, tab sis thermal conductivity gas analyzers yog qhov tseem ceeb roj sensors, txawm hais tias qee zaum lawv siv tib lub ntsiab lus tshawb nrhiav.
Ib nrab ntawm nws yog tsim los siv lub hauv paus ntsiab lus hais tias cov conductivity ntawm ib co hlau oxide semiconductor cov ntaub ntawv hloov nrog cov muaj pes tsawg leeg ntawm ib puag ncig gases 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 thiab txias, 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 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 thiab hydrazine). Cov cuab yeej zoo siab 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 qhov tseeb.
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.
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 lossis 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.
Hom roj sensor no muaj ib daim ntawv thov nqaim thiab ntau yam txwv.
