Yuav ua li cas yog ib tug yaj oxygen meter
Ib lub ntsuas oxygen yaj tau ntsuas cov pa oxygen yaj hauv cov kua dej. Cov pa oxygen yog yaj hauv dej los ntawm cov huab cua nyob ib puag ncig, huab cua txav thiab photosynthesis. Dissolved oxygen electrodes tuaj yeem siv los ntsuas thiab saib xyuas cov txheej txheem uas cov pa oxygen tuaj yeem cuam tshuam rau cov tshuaj tiv thaiv, kev ua haujlwm zoo, lossis ib puag ncig. Lub ntsuas pa oxygen yaj muaj cov yam ntxwv ntawm kev teeb tsa yooj yim, lub sijhawm ua haujlwm ntev (3 ~ 4 lub hlis), tsis pom kev rau lwm yam khoom, thiab tuaj yeem saib xyuas kev siv cov txheej thiab sab hauv electrolyte. Feem ntau, cov electrolyte thiab txheej yuav tsum tau hloov txhua txhua rau peb xyoos.
Kev ua kom cov pa oxygen kom zoo yog qhov tseem ceeb rau cov dej zoo thiab txhua yam kev ua neej yuav tsum tau oxygen. Cov txheej txheem kwj dej huv huv yuav tsum muaj cov pa oxygen kom zoo los muab cov ntaub ntawv aerobic life. Yog tias cov pa oxygen hauv cov dej qis dua 5.0mg / L, nws yuav nyuaj rau cov kab mob hauv dej kom ciaj sia, thiab qhov qis dua qhov concentration, nws yuav nyuaj dua. Yog tias cov pa oxygen qis dua 1-2mg/L thiab kav ntev li ob peb teev, nws yuav ua rau cov kab mob hauv dej tuag ntau.
Dissolved oxygen meter muab faib ua polarographic thiab fluorescence txoj kev.
1. Polarographic yaj oxygen meter.
Feem ntau ntawm cov pa oxygen yaj hauv kev ua lag luam yog cov cuab yeej tsom xam polarographic, thiab cov ppm-theem tuaj yeem siv dav hauv kev soj ntsuam tas li ntawm cov pa oxygen hauv cov kev daws teeb meem xws li tshuaj chiv, kev tiv thaiv ib puag ncig, tshuaj, biochemistry, zaub mov thiab dej kais dej. . ppb qib tshwj xeeb yog tsim los rau ppb qib dissolve oxygen ntsuas nyob rau hauv fais fab nroj tsuag, boiler pub dej thiab condensate dej, thiab lwm yam. Nws xyuas kom meej stability thiab raug ntawm (ultra) tsawg concentrations, thiab tam sim no technologies zoo heev nyob rau hauv cov nqe lus ntawm kev ntsuas kev ua tau zoo. thiab siv ib puag ncig. Kev txhim kho loj.
Feem ntau yaj cov pa ntsuas pa feem ntau siv cov diaphragm electrodes ua cov khoom siv los hloov cov pa oxygen concentration (qhov tseeb ntawm cov pa ib nrab siab) rau hauv cov teeb liab hluav taws xob, uas tom qab ntawd nthuav dav thiab hloov kho (xws li cov ntsev thiab qhov kub thiab txias), thiab tom qab ntawd tso tawm los ntawm kev hloov pauv hloov pauv mus rau digital. .
Muaj ob hom kev siv lub tshuab hluav taws xob rau cov ntsuas cov pa oxygen: polarographic (Polarography) thiab galvanic cell (Galvanic Cell). Polarography: Hauv electrode, lub nplhaib kub (Au) lossis platinum (Pt) kub nplhaib yog siv los ua cathode; silver-silver chloride (los yog mercury-mercurous chloride) yog siv los ua tus anode. Cov electrolyte yog cov tshuaj potassium chloride. Sab nrauv ntawm lub cathode yog them nrog cov pa oxygen-permeable zaj duab xis. Cov yeeb yaj kiab tuaj yeem txais cov khoom ua pa xws li polytetrafluoroethylene, polyvinyl chloride, polyethylene, silicone roj hmab, thiab lwm yam.
Qhov thib ob, fluorescence yaj oxygen meter.
Lub fluorescent yaj oxygen meter yog ua raws li lub hauv paus ntsiab lus ntawm quenching active fluorescence los ntawm cov khoom tshwj xeeb hauv physics.
Cov tshuaj fluorescent nyob rau pem hauv ntej ntawm lub sensor yog ib qho tshwj xeeb platinum metalloporphyrin compounded nrog polyester foil uas tso cai rau cov roj molecules hla, thiab saum npoo yog coated nrog ib txheej ntawm dub lub teeb-shielding khoom kom tsis txhob cuam tshuam los ntawm tshav ntuj thiab lwm yam fluorescent tshuaj. hauv dej. Lub qhov rais sapphire lub teeb yog cais los ntawm lub teeb liab thiab xiav qhov chaw thiab cov ntsiab lus photosensitive nyob rau hauv watertight titanium alloy plhaub. Lub teeb xiav modulated ci rau ntawm cov khoom siv fluorescent kom zoo siab thiab tawm teeb liab. Vim tias cov pa oxygen molecules tuaj yeem tshem tawm lub zog (quenching effect), lub sij hawm thiab kev siv ntawm lub teeb liab excitation yog inversely proportional rau concentration ntawm oxygen molecules. Peb siv lub teeb liab qhov chaw synchronized nrog lub teeb xiav raws li kev siv, ntsuas theem sib txawv ntawm lub teeb liab zoo siab thiab lub teeb siv, thiab muab piv nrog tus nqi calibration, thiaj li xam cov concentration ntawm oxygen molecules, tom qab linearization thiab kub them nyiaj, kom tso tawm tus nqi kawg.
Dissolved oxygen meters kuj muab faib ua ob peb pawg:
1. Raws li portable, nws muab faib ua: portable yaj oxygen meter, desktop yaj oxygen meter thiab cwj mem-hom yaj oxygen meter.
2. Raws li lub hom phiaj, nws tau muab faib ua: chav kuaj yaj oxygen meter, industrial online yaj oxygen meter, thiab lwm yam.
3. Raws li qib siab, nws tau muab faib ua: kev lag luam yaj oxygen meter, ntse yaj oxygen meter, precision yaj oxygen meter los yog pointer hom yaj oxygen meter, digital zaub yaj oxygen meter.
4. Tus cwj mem-hom yaj oxygen meter feem ntau ua rau hauv ib qho thiab muaj qhov ntsuas nqaim. Nws yog ib qho cuab yeej tshwj xeeb thiab yooj yim.
