PID sensor, lub npe puv PID photoionization gas sensor, ua haujlwm raws li lub hauv paus ntsiab lus ntawm photoionization. Nws txoj hauv kev ua haujlwm yog raws li hauv qab no: lub teeb ci ultraviolet (UV) lub teeb nyob rau hauv lub sensor hloov cov organic teeb meem (VOC gas) rau hauv qhov zoo thiab tsis zoo ions (ionization) uas tuaj yeem kuaj tau los ntawm lub tshuab ntes. Nyob rau hauv qhov kev txiav txim ntawm hluav taws xob teb, cov electrons thiab zoo them ions generated los ntawm ionization tsim ib tug tsis muaj zog tam sim no, thiab cov ntsiab lus ntawm cov khoom yog reflected los ntawm kev soj ntsuam cov kev siv tam sim no. Thaum kawg, peb siv cov txheej txheem hluav taws xob txhawm rau txheeb xyuas cov naj npawb ntawm cov ions no los txiav txim siab qhov concentration ntawm cov pa ntsuas.
Ib. Cov yam ntxwv ua haujlwm ntawm PID gas sensor
1. High precision, PID sensor muaj siab rhiab heev thiab tuaj yeem ntes cov roj organic ntawm qib ppb (ib billionth). General photoionization gas sensors tuaj yeem ntes cov roj organic ntawm qib ppm (ib lab), nrog qhov tseeb siab dua li cov pa sensors xws li infrared, electrochemical, thiab catalytic combustion.
2. Tsis muaj kev puas tsuaj rau cov roj pom, kev ruaj ntseg zoo! PID gas sensor ionizes cov roj tom qab nqus nws, thiab cov ions tsim los ntawm cov roj molecules tsim cov roj molecules qub tom qab tso tawm, tsis ua rau cov roj molecules qub.
3. Cov lus teb ceev ceev thiab lub neej ntev. Raws li kev ua haujlwm ib txwm muaj, PID roj sensors tuaj yeem teb yuav luag raws sijhawm thiab tuaj yeem kuaj tsis tu ncua.
4. PID roj sensors tuaj yeem hloov mus rau qhov kev tshawb pom ntawm feem ntau VOC volatile organic tebchaw thiab qee cov roj inorganic, thiab tuaj yeem siv dav hauv tshuaj lom neeg, tsheb thauj mus los, kev sim tshuaj xyuas thiab lwm yam haujlwm.
2. PID siv isobutylene raws li cov qauv roj rau cov laj thawj hauv qab no:
1. Isobutylene muaj lub zog ionization tsawg, Ie=9.24V, thiab tuaj yeem ua ionized los ntawm ultraviolet teeb (UV teeb) ntawm 9.8eV, 10.6eV, lossis 11.7eV.
2. Cov saw hlau ntev yog 3, nrog 1 ceg saw, thiab cov molecule tsis yog loj los yog me me, uas yog piv rau qhov loj ntawm feem ntau volatile organic compounds VOC, thiab yog tus sawv cev.
3. Isobutylene muaj toxicity tsawg thiab nyob rau hauv gaseous lub xeev ntawm chav tsev kub. Raws li calibration gas, nws tsis cuam tshuam rau kev noj qab haus huv ntawm cov neeg ua haujlwm.
4. Tus nqi tsis siab thiab yuav yooj yim dua.
5. Nws cov concentration kuj yooj yim dua los xyuas siv lwm txoj kev ntsuas lub cev.
3. Daim ntawv thov ntawm PID sensor
Daim ntawv thov Scope ntawmVOC Gas DetectorPID sensor yog dav heev, feem ntau suav nrog cov hauv qab no:
1. Muaj ntau lawm: Hauv kev lag luam kev lag luam xws li roj av, petrochemical, tshuaj, tshuaj, thiab lwm yam., PID sensors yog siv los kuaj cov organic tebchaw (VOCs). Cov tebchaw no yooj yim rau volatilize ntawm chav tsev kub, nrog rau benzene, toluene, xylene, formaldehyde, thiab lwm yam, uas muaj kev cuam tshuam loj rau tib neeg kev noj qab haus huv.
2. Kev saib xyuas ib puag ncig: PID sensors tuaj yeem ntes VOCs thiab lwm yam pa phem hauv huab cua, thiab tau siv dav hauv kev noj qab haus huv rau pej xeem, kev saib xyuas huab cua hauv tsev thiab lwm yam haujlwm. Nws tuaj yeem paub qhov txawv ntawm VOCs thiab lwm cov pa roj carbon monoxide nyob rau hauv qhov concentration ntawm ib feem ntawm ib billion (ppb) mus rau ib feem ntawm ib txhiab (ppm), nrog rau ntau yam kev tshawb pom thiab muaj kev nkag siab zoo.
3. Kev kuaj pom kev sib tsoo thaum muaj xwm txheej ceev: Hauv kev tshawb pom kev sib tsoo thaum muaj xwm txheej ceev, PID sensors ua lub luag haujlwm hloov tsis tau. VOCs yog cov khoom tsim kev puas tsuaj hauv ntau qhov xwm txheej roj, thiab kev saib xyuas zoo ntawm cov tshuaj no yog qhov tseem ceeb rau kev tiv thaiv kev puas tsuaj thiab txo qis.
4. Kev ceev faj rau kev siv: Thaum siv PID sensors, yuav tsum ceev faj kom tsis txhob tshuab ncaj qha ntawm lub sensor thiab tsis txhob siv nws nyob rau hauv ib qho chaw muaj av noo los tiv thaiv condensation noo noo los ntawm kev cuam tshuam kev ua haujlwm. Thaum lub sijhawm khaws cia, cov av noo yuav tsum tau khaws cia kom tsawg thiab siv lub desiccant yog tias tsim nyog.