Taw qhia rau ntau yam Sensors thiab cov txheej txheem ua haujlwm hauv Gas Detectors
Gas detector yog ib qho cuab yeej rau kev soj ntsuam cov roj to concentration, feem ntau xa mus rau portable / handheld gas detectors.
Qhov tseem ceeb ntawm kev siv cov pa roj sensors yog los xyuas cov hom roj uas muaj nyob hauv ib puag ncig. Gas sensors yog cov 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 soj ntsuam cov qauv rau kev faib tawm;
Qhov ntawd yog hais tias, ib qho sensor siv los xyuas cov roj muaj pes tsawg leeg thiab concentration yog hu ua roj sensor, tsis hais seb nws siv lub cev los yog tshuaj.
Piv txwv li, cov sensors uas kuaj cov roj ntws tsis suav tias yog cov roj hluav taws xob, tab sis cov thermal conductivity gas analyzers raug cais raws li cov pa hluav taws xob tseem ceeb, txawm hais tias qee zaum lawv siv feem ntau cov qauv kev soj ntsuam.
Semiconductor Gas Sensor
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.
Catalytic incineration gas sensor
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. Kev kub hnyiab yog ib qho kev ua haujlwm ntawm qhov concentration ntawm cov pa roj carbon monoxide raws li qhov kub thiab txias ntawm platinum resistor nce thiab qhov kev hloov pauv.
Thermal conductivity gas sensor
Txhua cov roj muaj nws tus kheej cov thermal conductivity, thiab thaum thermal conductivity ntawm ob los yog ntau dua gases txawv txawv, thermal conductivity ntsiab yuav siv tau los paub qhov txawv cov ntsiab lus ntawm ib feem ntawm lawv.
Hom sensor no yog tam sim no dav siv los kuaj xyuas cov pa roj carbon dioxide, cov pa roj carbon dioxide, thiab siab concentration methane.
Electrochemical gas sensor
Qee qhov ntawm nws cov hluav taws xob hluav taws xob, tshuaj lom thiab teeb meem roj muaj cov khoom siv hluav taws xob thiab tuaj yeem ua hluav taws xob oxidized lossis rov qab los.
