Electrochemical Sensors rau Gas Detection Instruments
Ib feem tseem ceeb ntawm nws 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 oxidized lossis txo. Siv cov tshuaj tiv thaiv no, cov khoom siv roj tuaj yeem paub qhov txawv thiab cov pa roj tuaj yeem kuaj pom. Electrochemical gas sensors muab faib ua ntau pawg:
(1), thawj cell-type gas sensors (tseem hu ua: Gavony battery-type gas sensors, tseem hu ua roj cell-type gas sensors, tseem hu ua spontaneous battery-type gas sensors), lawv txoj cai yog tib yam li qhuav cell roj teeb peb siv, tshwj tsis yog tias lub roj teeb cov roj carbon-manganese electrodes yog hloov los ntawm cov roj electrodes. Noj cov pa oxygen sensor ua piv txwv, oxygen txo ntawm cathode thiab electrons ntws los ntawm ammeter mus rau 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 sensor, qhov sensor no yog siv rau kev tshawb nrhiav ntawm kev txo cov pa roj carbon monoxide zoo heev, nws txoj cai tsis zoo ib yam li lub xov tooj ntawm tes sensor, nws cov tshuaj tiv thaiv electrochemical tshwm sim nyob rau hauv lub compulsion ntawm tam sim no, yog qhov tseeb Coulomb tsom xam ntawm lub sensor. Qhov sensor no tau ua tiav siv rau: carbon monoxide, hydrogen sulfide, hydrogen, ammonia, hydrazine, thiab lwm yam gases hauv kev tshawb nrhiav, yog lub ntsiab ntawm cov khoom muaj kuab lom thiab muaj kev phom sij rau kev kuaj pom.
(3), qhov sib txawv ntawm qhov sib txawv roj teeb hom roj sensor, 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 thiab cov roj concentration yog cuam tshuam nrog kev sib txawv ntawm cov roj teeb. kev vam meej ntawm no sensor yog lub tsheb oxygen sensor, khoom electrolyte carbon dioxide sensor.
(4), txwv tam sim no hom roj sensor, muaj kev ntsuas ntawm oxygen concentration ntawm lub sensor siv electrochemical cell nyob rau hauv qhov txwv tam sim no thiab cov cab kuj 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 hlau.
Infrared
Feem ntau cov gases muaj cov yam ntxwv nqus cov ncov nyob rau hauv nruab nrab-infrared cheeb tsam, thiab cov concentration ntawm ib tug roj yuav txiav txim tau los ntawm kev soj ntsuam qhov nqus ntawm qhov chaw ntawm tus yam ntxwv absorption ncov.
Cov sensors no tau siv rau hauv cov cuab yeej ntsuas loj, tab sis nyob rau xyoo tas los no, nrog kev txhim kho ntawm kev lag luam sensor raws li MEMS thev naus laus zis, qhov loj ntawm cov sensors no tau raug txo los ntawm loj heev 10 litres thiab 45 kilograms mus txog 2 milliliters (cov. qhov loj ntawm tus ntiv tes xoo). Kev siv cov cuab yeej ntsuas hluav taws xob uas tsis tas yuav tsum muaj lub teeb pom kev hloov pauv ua rau cov cuab yeej tu-dawb yam tsis muaj cov khoom txav mus los. Lub tshuab hluav taws xob infrared tuaj yeem paub qhov txawv ntawm cov roj hom thiab ntsuas qhov ntsuas roj kom raug.
Qhov no sensor tau ntse siv rau: carbon dioxide, methane detection.
