Electrochemical formula ntawm lub gas detector
Ib feem ntawm nws cov nplaim taws, muaj kuab lom thiab tsis zoo 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 roj ntau tuaj yeem kuaj pom. Muaj ntau yam subcategories ntawm electrochemical gas sensors:
(1) Cov roj teeb tseem ceeb ntawm cov roj teeb (tseem hu ua: Gavoni roj teeb hom roj teeb sensors, roj cell-type gas sensors, thiab spontaneous battery-type gas sensors), lawv txoj cai yog tib yam li cov roj teeb uas peb siv, tab sis, Cov pa roj carbon-manganese electrodes ntawm lub roj teeb tau hloov los ntawm cov roj electrodes. Nyob rau hauv cov ntaub ntawv ntawm ib tug oxygen sensor, oxygen yog txo nyob rau hauv lub cathode thiab electrons ntws los ntawm lub 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. Qhov ntsuas no tuaj yeem kuaj pom cov pa oxygen, sulfur dioxide, chlorine, thiab lwm yam.
(2) Tsis tu ncua muaj peev xwm electrolytic cell hom roj sensor. Qhov sensor no zoo heev rau kev kuaj xyuas cov pa roj. Nws lub hauv paus ntsiab lus txawv ntawm qhov qub roj teeb hom sensor. Nws cov tshuaj tiv thaiv electrochemical tshwm sim nyob rau hauv lub zog ntawm tam sim no. Nws yog qhov tseeb coulometric sensor. Lub sensor no tau siv dav hauv kev tshawb nrhiav cov pa roj carbon monoxide, hydrogen sulfide, hydrogen, ammonia, hydrazine, thiab lwm yam gases, thiab yog lub ntsiab lus tseem ceeb rau kev tshawb nrhiav cov pa phem thiab cov pa phem uas twb muaj lawm.
(3) Concentration roj teeb hom roj sensor, lub electrochemically active roj yuav spontaneously tsim ib tug concentration electromotive quab yuam ntawm ob sab ntawm lub electrochemical cell, thiab qhov loj ntawm lub electromotive quab yuam muaj feem xyuam rau cov concentration ntawm cov roj. Qhov piv txwv zoo ntawm qhov ntsuas no yog lub tsheb Oxygen sensor, khoom electrolyte carbon dioxide sensor.
(4), limiting tam sim no hom roj sensor, muaj ib tug sensor rau ntsuas oxygen concentration, uas siv lub hauv paus ntsiab lus hais tias lub limiting tam sim no nyob rau hauv electrochemical cell muaj feem xyuam rau lub carrier concentration los npaj ib tug oxygen (gas) concentration sensor, uas yog siv. rau oxygen nrhiav tau ntawm tsheb thiab molten steel Oxygen concentration nrhiav kom tau.
