Txoj cai ntawm kev siv electrochemical gas detectors
Ib feem tseem ceeb ntawm cov nplaim hluav taws kub, muaj kuab lom thiab muaj kev phom sij yog cov khoom siv hluav taws xob thiab tuaj yeem ua rau electrochemically oxidised lossis txo. Siv cov tshuaj tiv thaiv no, cov khoom siv roj tuaj yeem paub qhov txawv thiab cov roj ntau tuaj yeem kuaj pom. Electrochemical gas sensors muab faib ua ntau pawg:
(1), tus thawj roj teeb hom roj ntes (tseem hu ua: Gavony roj teeb hom roj teeb sensors, tseem hu ua roj cell-type gas sensors, tseem hu ua spontaneous battery-type gas sensors), lub hauv paus ntsiab lus ntawm lawv cov kab nrog lub roj teeb ntawm tes qhuav peb siv, tsuas yog, lub roj teeb cov roj carbon thiab manganese electrodes tau hloov los ntawm cov roj electrodes. Nyob rau hauv cov ntaub ntawv ntawm oxygen sensor, piv txwv li, oxygen yog txo nyob rau hauv lub cathode thiab electrons ntws los ntawm ammeter mus rau lub anode, qhov twg cov hlau lead yog oxidized. Qhov loj ntawm qhov tam sim no ncaj qha ntsig txog qhov concentration ntawm oxygen. Hom sensor no tuaj yeem ntes cov pa oxygen, sulfur dioxide, chlorine thiab lwm yam.
(2), tas li muaj peev xwm electrolytic cell type gas detector, no sensor yog siv los xyuas kom txo tau gases zoo heev, nws lub hauv paus ntsiab lus tsis zoo li cov thawj cell hom sensor, nws electrochemical cov tshuaj tiv thaiv tshwm sim nyob rau hauv lub compulsion ntawm tam sim no, nws yog ib tug tiag sensor ntawm Coulomb tsom xam. Lub sensor no tau ua tiav siv rau: carbon monoxide, hydrogen sulfide, hydrogen, ammonia, hydrazine, thiab lwm yam gases hauv kev tshawb nrhiav, yog tam sim no lub ntsiab ntawm cov pa tshuaj lom thiab phom sij nrhiav kom pom.
(3), qhov sib txawv ntawm qhov sib txawv roj teeb hom roj ntes, nrog electrochemical kev ua haujlwm ntawm cov roj ntawm ob sab ntawm lub roj teeb hluav taws xob, yuav ua rau muaj qhov sib txawv ntawm cov hluav taws xob muaj peev xwm, qhov loj ntawm lub peev xwm hluav taws xob muaj feem xyuam rau cov concentration ntawm cov roj, kev vam meej ntawm xws li sensors yog lub tsheb oxygen sensors, khoom electrolyte hom carbon dioxide sensor.
(4), txwv tam sim no hom roj detector, muaj ib tug ntsuas ntawm oxygen concentration ntawm lub sensor siv electrochemical cell nyob rau hauv qhov txwv tam sim no thiab carrier concentration hais txog lub hauv paus ntsiab lus ntawm kev npaj ntawm oxygen (gas) concentration sensor, siv rau automotive oxygen nrhiav kom tau, thiab nrhiav kom tau oxygen concentration hauv cov dej steel.
