Koj paub ntau npaum li cas txog cov pa ntsuas pa ntsuas
Gas sensor yog lub converter uas hloov cov roj ntim feem ntau rau hauv cov teeb liab hluav taws xob. Lub taub hau sojntsuam ua rau cov qauv roj los ntawm cov pa sensor, feem ntau suav nrog kev lim tawm cov impurities thiab cuam tshuam cov pa roj, ziab lossis ua kom txias rau cov khoom siv ntawm qhov ntsuas.
Gas sensor yog ib qho khoom siv uas hloov cov ntaub ntawv xws li roj av muaj pes tsawg leeg thiab cov ntsiab lus rau hauv cov ntaub ntawv uas tuaj yeem siv los ntawm cov neeg ua haujlwm, cov cuab yeej, khoos phis tawj, thiab lwm yam! Gas sensors feem ntau yog cais raws li tshuaj sensors, txawm hais tias qhov kev faib tawm no tsis tas yuav tsum tau tshawb fawb.
Hauv qee cov roj av, tshuaj lom neeg, thee thiab lwm yam kev lag luam, ntau yam khoom siv hluav taws xob thiab hluav taws xob tawg lossis cov kua dej feem ntau tuaj yeem xau thaum lub sijhawm tsim khoom, ua haujlwm thiab kev thauj mus los. Rau cov pa xau no, peb yuav tsum tau saib xyuas lawv hauv lub sijhawm. Lub sij hawm no Nws yog inseparable los ntawm daim ntawv thov ntawm roj detectors. Gas detector yog inseparable los ntawm lub sensor. Cov sensors sib txawv muaj cov haujlwm sib txawv. Tom ntej no, peb yuav qhia 6 sensors.
PID photoionization gas sensor
PID yog tsim los ntawm ultraviolet lub teeb qhov chaw thiab ion chamber thiab lwm yam tseem ceeb. Muaj qhov zoo thiab tsis zoo electrodes nyob rau hauv lub ion chamber los tsim ib qho hluav taws xob teb. Nyob rau hauv lub irradiation ntawm ultraviolet teeb, cov roj yuav tsum tau ntsuas yog ionized los tsim ions zoo thiab tsis zoo, thiab ib tug tam sim no yog tsim ntawm cov electrodes. Teeb liab. PID muaj qhov zoo ntawm qhov kev xav tau siab, tsis muaj teeb meem lom, kev nyab xeeb thiab kev ntseeg tau.
Galvani roj teeb oxygen sensor
Diaphragm Galvani roj teeb hom oxygen sensor qauv: ntawm ib sab ntawm lub thawv yas, ib qho 10-30μm tuab polytetrafluoroethylene gas-permeable membrane nrog cov pa permeability zoo, thiab cov hlau muaj txiaj ntsig (platinum, kub, nyiaj, thiab lwm yam.) tsis zoo electrode, thiab tsim ib qho anode (lead, cadmium, thiab lwm yam, nrog lub siab ionization nyiam hlau) nyob rau sab nraud ntawm lub thawv lossis qhov khoob ntawm lub thawv.
Potassium hydroxide yog siv, thaum oxygen dhau los ntawm electrolyte, cov tshuaj tiv thaiv redox tshwm sim ntawm cathode thiab anode, uas ionizes cov hlau anode thiab tso tawm electrons. Qhov loj ntawm tam sim no yog proportional rau tus nqi ntawm cov pa. Txij li thaum cov hlau anode tau noj thaum lub sij hawm tag nrho cov tshuaj tiv thaiv, lub sensor xav tau hloov tsis tu ncua. Tam sim no, thev naus laus zis hauv tsev tau loj hlob ib hnub dhau ib hnub, thiab nws muaj peev xwm ua tiav hauv zos xws li sensors.
catalytic combustion sensor
Lub hauv paus ntsiab lus ntawm catalytic combustion sensor yog ib qho ntawm cov qauv siv dav tshaj plaws los kuaj xyuas cov roj hluav taws xob tam sim no. Nws muaj cov yam ntxwv ntawm cov teeb liab tawm zoo linearity, txhim khu kev qha Performance index, pheej yig tus nqi, thiab tsis muaj kev cuam tshuam nrog lwm yam tsis-combustible gases.
Lub catalytic combustion sensor tau txais lub hauv paus ntsiab lus ntawm Wheatstone choj, thiab qhov ntsuas qhov ntsuas thiab cov roj combustible nyob rau hauv ib puag ncig undergo flameless combustion, yog li ntawd qhov kub thiab txias hloov tus nqi ntawm cov sensing resistor, lov qhov seem ntawm tus choj, thiab ua rau nws tso zis. lub teeb liab tam sim no ruaj khov. Amplification, stabilization thiab ua nyob rau hauv post circuits thaum kawg qhia txog qhov tseem ceeb.
Tsis tu ncua muaj peev xwm electrolytic gas sensor
Lub peev xwm tas li electrolytic sensor tam sim no yog cov cuab yeej siv dav tshaj plaws rau kev kuaj tshuaj lom. Hauv qhov kev hwm no, cov thev naus laus zis txawv teb chaws yog thawj coj, yog li feem ntau ntawm cov sensors cia siab rau kev xa khoom. Cov qauv ntawm cov khoom siv hluav taws xob tsis tu ncua: nyob rau hauv lub cev cylindrical ua los ntawm cov yas, cov khoom siv hluav taws xob ua haujlwm, lub txee electrode thiab cov khoom siv hluav taws xob tau teeb tsa, cov electrolyte tau ntim ntawm cov electrodes, thiab cov diaphragm ua los ntawm cov ntxeem tau tetrafluoroethylene yog muab tso rau hauv. pob saum toj kawg nkaus.
Kev sib txuas ntawm lub preamplifier thiab sensor electrodes siv qee qhov peev xwm ntawm cov electrodes los ua kom lub sensor ua haujlwm. Oxidation lossis txo cov tshuaj tiv thaiv tshwm sim ntawm cov roj thiab cov khoom siv hluav taws xob ua haujlwm hauv electrolyte, txo lossis oxidation cov tshuaj tiv thaiv tshwm sim ntawm lub txee electrode, thiab qhov sib npaug ntawm cov electrode hloov, thiab qhov hloov pauv tus nqi yog proportional rau cov roj concentration.
Infrared Sensor Infrared Sensor
Siv lub hauv paus ntsiab lus ntawm kev nqus ntawm ntau lub ntsiab lus ntawm ib lub wavelength tshwj xeeb, nws muaj cov tshuaj tiv thaiv zoo, cov lus teb rhiab, thiab teb rau feem ntau cov hydrocarbons. Tab sis tus qauv yog qhov nyuaj thiab tus nqi siab.
hlau oxide semiconductor sensor
Cov hlau oxide semiconductor sensor siv cov adsorption ntawm cov roj ntsuas los hloov cov conductivity ntawm semiconductor, thiab ua kom lub tswb ntsuas hluav taws xob los ntawm kev sib piv ntawm qhov kev hloov tam sim no. Txij li thaum qhov ntsuas ntawm lub semiconductor sensor cuam tshuam zoo heev los ntawm ib puag ncig, cov kab tawm cov duab tsis ruaj khov. Hlau-oxide-semiconductor sensors, vim lawv cov lus teb rhiab heev, tam sim no tau siv dav hauv kev ntsuas micro-kua pa ntawm cov pa roj.
Kev khiav hauj lwm ib puag ncig ntawm lub tshuab ntes roj yog qhov hnyav, ib puag ncig los ntawm ntau yam pa phem. Lub sensor yog lub hauv paus tseem ceeb ntawm kev ntsuas roj transformer thiab tus yuam sij rau kev kuaj xyuas cov roj concentration. Nrog cov qauv kev tshawb pom sib txawv, cov sensors kuj txawv.
