Yuav ua li cas hloov lel%, vol% thiab ppm hauv cov roj detectors
Thaum siv cov ntaub ntawv ntsuas roj hauv lub neej nyob rau hauv lub neej txhua hnub, cov ntawv txheeb xyuas ntawm LCD cov qauv feem ntau tshwm sim nrog cov lus siv roj xws li} lel% lossis {ppm, lossis volm. Peb qhov twg lwm qhov kev ua txhaum cai txhais tau li cas thiab lawv hloov dua siab tshiab li cas?
Vol% (Roj Ntim Feem)
Vol yog lub cev lub cev uas piav txog qhov ntim ntawm cov roj, qhia raws feem pua, uas yog qhov feem pua ntawm cov pa ntawm huab cua. Piv txwv li, 5% vol methane sawv cev hais tias cov ntim ntawm methane hauv huab cua yog 5%.
Kev tshawb xyuas ntau yam ntawm cov roj detectors feem ntau qhia txog kev ntsuas vol%, piv txwv li cas rau cov roj hluav taws xob no tuaj yeem tshawb pom ntau yam ntawm cov pa ntawm {1}}%.
Peb tseem tuaj yeem tsim qee feem pua tus nqi ntawm vol raws li lub ntsiab lus ntawm qee qhov kev teeb tsa tus nqi, lub zog roj yuav suab lub tswb. Qhov no cuam tshuam nrog lwm chav tsev, lel%.
Lel% (qis qis tshaj txwv)
Cov roj sib xyaw ua ke yog ib cov roj sib xyaw ua ntej tuaj yeem sib xyaw nrog huab cua (lossis cov pa oxygen) tsis pub dhau ib qho kev xav tau ntau yam. Thaum nws ntsib hluav taws qhov hluav taws xob, nws yuav tawg. Feem pua qis dua ntawm cov roj uas muaj peev xwm ua tau rau cov pa roj, yog lil%, yog li tsawg tsawg ". Cov concentration ntawm cov roj ntim ntawm cov qis qis tshaj plaws txwv yog qhia hauv Lel%, uas yog, qis tawg ua rau ib puas npaug, nrog ib chav nyob 1Lel%.
PPM (feem ib lab ntawm cov roj ntim feem pua)
Lub tswvyim ntawm PPM zoo ib yam li vol, tshwj tsis yog tias PPM sawv cev rau ib lab lab pua pua ntawm cov roj ntim.
Piv txwv li, 10pplpm carbon dioxide yog hais txog lub xub ntiag ntawm 10 feem ib lab lab ntawm carbon dioxide nyob rau saum huab cua, raws li PPM chav nyob tsis muaj chaw nyob.
