Lub hauv paus ntsiab lus ua haujlwm ntawm electrochemical gas detector
Ib feem ntawm cov nplaim hluav taws kub, muaj kuab lom, thiab cov pa phem hauv cov khoom siv hluav taws xob muaj cov khoom siv hluav taws xob thiab tuaj yeem ua rau electrochemically oxidized lossis txo. Los ntawm kev siv cov tshuaj tiv thaiv no, cov roj muaj pes tsawg leeg tuaj yeem paub qhov txawv thiab cov roj concentration tuaj yeem kuaj pom. Electrochemical gas sensors muab faib ua ntau pawg:
(1) Lub hauv paus ntsiab lus ntawm tus thawj roj teeb hom roj ntes (tseem hu ua Gavoni roj teeb hom roj teeb sensor, roj cell hom roj sensor, lossis cov roj teeb uas tsis muaj roj sensor) yog tib yam li cov roj teeb qhuav uas peb siv, tshwj tsis yog cov roj carbon. manganese electrode ntawm lub roj teeb yog hloov los ntawm cov roj electrode. Ua ib qho piv txwv ntawm oxygen sensor, cov pa oxygen txo ntawm lub cathode, thiab cov 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 ua tau
(2) Tsis tas li muaj peev xwm electrolytic cell type gas detector, qhov sensor no zoo heev rau kev kuaj xyuas cov pa roj. Nws lub hauv paus ntsiab lus txawv ntawm cov thawj roj teeb hom sensor, thiab nws cov tshuaj tiv thaiv electrochemical tshwm sim nyob rau hauv lub zog ntawm tam sim no. Nws yog qhov tseeb Coulomb tsom xam sensor. Hom sensor no tau ua tiav hauv kev tshawb nrhiav cov pa roj xws li carbon monoxide, hydrogen sulfide, hydrogen, ammonia, hydrazine, thiab lwm yam. Nws yog tam sim no lub ntsiab sensor rau kev kuaj cov pa phem thiab cov pa phem.
(3) Lub concentration roj teeb hom roj detector, nrog electrochemically active roj ntawm ob sab ntawm lub electrochemical cell, yuav spontaneously tsim ib tug concentration electromotive quab yuam. Qhov loj ntawm lub zog electromotive muaj feem xyuam rau qhov concentration ntawm cov pa. Cov piv txwv ua tau zoo ntawm cov sensors no yog cov pa oxygen sensors rau tsheb thiab cov khoom electrolyte hom carbon dioxide sensors.
(4) Qhov txwv tam sim no hom roj ntes tau muaj lub ntsuas ntsuas rau ntsuas cov pa oxygen, uas siv lub hauv paus ntsiab lus tias qhov txwv tam sim no hauv cov hluav taws xob hluav taws xob muaj feem cuam tshuam rau cov cab kuj concentration los npaj cov pa oxygen (gas) concentration sensor rau oxygen hauv tsheb thiab oxygen concentration nrhiav pom nyob rau hauv molten steel.
