ppb yaj oxygen meter oxygen hluav taws xob txoj cai
Dissolved oxygen hluav taws xob daim ntawv thov spectrum txoj cai, siv platinum (Pt) raws li qhov tsis zoo, Ag / AgCl raws li qhov zoo, cov electrolyte yog 0.1M potassium chloride (KCL), thiab silicone roj hmab permeable membrane imported los ntawm Tebchaws Meskas. (BJ) yog siv los ua cov pa membrane, uas muaj Silicone roj hmab thiab steel gauze, resistant rau kev sib tsoo, corrosion, kub thiab tsis deformation.
Thaum ntsuas, qhov hluav taws xob ntawm 0.68V yog siv ntawm cov anode thiab cathode. Cov pa oxygen yog noj nyob rau hauv cathode los ntawm permeable membrane, thaum sib npaug ntawm cov pa oxygen yog tsim nyob rau hauv anode. Cov txheej txheem dynamic no nce mus txog qhov sib npaug thaum cov pa oxygen ib feem ntawm ob sab yog tib yam. Lub sijhawm no, hluav taws xob tam sim no hauv chav hluav taws xob yog proportional rau cov pa oxygen ib nrab siab. Lub ntsuas ntsuas ntsuas qhov tam sim no thiab hloov nws mus rau hauv cov pa oxygen los ntawm kev suav. Nyob rau tib lub sijhawm, lub thermistor kuaj xyuas qhov ntsuas kub ntawm cov tshuaj thiab ua qhov kub thiab txias ntawm cov pa concentration.
Lub roj teeb yaj cov pa oxygen tau txais kev tsim kho tshiab compression plug-in qauv, uas yooj yim heev rau kev teeb tsa thiab kev saib xyuas. Cov kav dej nkag thiab qhov hluav taws xob ntawm cov dej ntws ntawm tes tuaj yeem ua los ntawm cov kav hlau tsis muaj steel, nrog rau sab nraud ntawm Φ6, Φ8, Φ10, Φ12 thiab Φ14. Kev Kho: Feem ntau, tsis tas yuav hloov cov ndlwg ntawm tes thiab cov tub ntxhais hluav taws xob, tsuas yog yuav tsum tau hloov cov membrane breathable.
txoj cai ua haujlwm:
Cov hluav taws xob yaj oxygen yaj siv platinum (Pt) ua cov anode, Ag / AgCl raws li cov anode, cov electrolyte yog {{0}}}.1M potassium chloride (KCl), thiab silicone roj hmab permeable membrane yog siv los ua cov breathable daim nyias nyias. Thaum ntsuas, qhov hluav taws xob ntawm 0.68V yog siv ntawm cov anode thiab cathode. Cov pa oxygen yog noj nyob rau hauv cathode los ntawm permeable membrane. Tus nqi ntawm cov pa oxygen dhau los ntawm daim nyias nyias yog proportional rau cov pa oxygen concentration hauv dej. Yog li ntawd, qhov tsawg diffusion tam sim no ntawm cov electrodes yog proportional rau cov yaj oxygen concentration hauv dej. Raws li txoj cai, lub ntsuas ntsuas ntsuas qhov hluav taws xob no thiab hloov mus rau hauv cov pa oxygen los ntawm kev suav. Nyob rau tib lub sijhawm, lub thermistor kuaj xyuas qhov ntsuas kub ntawm cov tshuaj thiab ua qhov kub thiab txias ntawm cov pa concentration.
Tam sim no thaum lub sij hawm huab cua calibration feem ntau (50 ~ 200) nA
Cov tshuaj tiv thaiv hluav taws xob ntawm hluav taws xob yog:
Yin (Pt) O2+2H2O+4e=4OH-
Yin (Ag) 4Ag+4Cl-=4AgCl+4e
Hluav taws xob txoj cai:
Lub ntsuas oxygen yaj siv cov hluav taws xob spectral oxygen. Nws tau muab faib ua hom hauv online thiab chav kuaj, thiab tseem muab faib ua hom dej ntshiab thiab hom dej ntau.
Cov pa hluav taws xob yog tsim los ntawm kub yin thiab nyiaj yang, qhov twg yin yog platinum (Pt) thiab yang yog Ag / Agd. Cov electrodes yog immersed nyob rau hauv ib qho electrolyte ntawm {{0}}}.1 m poov tshuaj chloride (KCL), sib cais los ntawm ib daim nyias nyias uas permeable rau cov roj uas ntsuas. Lub breathable membrane yog silicone roj hmab permeable membrane tuaj ntawm Tebchaws Meskas (BS), uas muaj kev tiv thaiv los ntawm cov hlau mesh thiab tiv taus kev sib tsoo, corrosion, kub thiab deformation. Ib qho kev pab cuam annular silver shields ncig lub kub cathode, zoo tshem tawm kev cuam tshuam los ntawm oxygen hauv electrolyte thaum ntsuas hypoxic. Thaum cov pa oxygen diffuses rau hauv cov tshuaj electrolyte los ntawm daim nyias nyias, nws raug txo kom hydroxide ions ntawm lub anode, thiab nyiaj yog oxidized rau nyiaj chloride ntawm lub anode. Lub sijhawm no, qhov hluav taws xob ntawm 0.68 yog ntxiv rau lub anode thiab anode, thiab tam sim no generated yog nyob rau ntawm ib tug tej yam kub thiab txias. Ncaj nraim proportional rau cov pa ib nrab siab ntawm nruab nrab.
Cov pa oxygen tam sim no thaum lub sij hawm ntsuas huab cua feem ntau yog 6000nA ~ 13000nA, thiab nws cov tshuaj tiv thaiv hluav taws xob yog:
Yin (Pt) O2+2H2O+4e=4OH+
Yang (Ag) 4Ag+4Cl=4AgCl+4e
