Turbidimeters muaj ntau yam kev ntsuas kom haum rau ntau yam kev siv. Portable lossis benchtop turbidity meters feem ntau muaj ntau yam ntawm 0-1000 NTU thiab txhawb nqa ntau yam segmentation (xws li, 0.01-19.99 NTU; 20.0-99.9 NTU; 100-1000 NTU). Inline turbidity meters muaj ntau qhov dav, nrog rau cov qauv siab mus txog 0-9999 NTU thiab cov qauv qis uas tsom mus rau qhov ntsuas qhov zoo xws li 0-40 NTU.
Kev daws teeb meem yog hais txog qhov hloov pauv me tshaj plaws hauv qhov tsis sib haum xeeb uas lub ntsuas ntsuas tuaj yeem pom, nqis mus rau 0.001 NTU rau qhov ntsuas qis -turbidity. Qhov tseeb yog feem ntau qhia raws li qhov feem pua kev ua yuam kev ntawm kev nyeem ntawv lossis qhov feem pua qhov yuam kev ntawm tag nrho cov nplai (FS), xws li ± 2% ± 1 tus lej lej (hauv 0-500 NTU ntau), lossis hauv ± 5% FS. Repeatability tuaj yeem ncav cuag ± 1% ntawm kev nyeem ntawv.
Hom teeb pom kev zoo txiav txim siab cov qauv ntsuas qhov ntsuas tau ua raws. Infrared light sources (wavelength feem ntau 850-880nm) ua raws li ISO 7027 thoob ntiaj teb cov qauv; Cov khoom siv hluav taws xob dawb (xws li tungsten teeb lossis LEDs dawb) ua raws li US EPA 180.1 cov qauv. Qee cov qauv siab -kawg siv lub teeb ci dual (dawb lub teeb thiab lub teeb infrared) tsim kom tau raws li cov kev cai dav dav.
Qhov ntsuas kub ua haujlwm feem ntau yog 0℃txog 50 degree. Cov qauv ntsuas kub hloov tau feem ntau yog 0℃txog 50 degree, nrog qee qhov kev ntsuas hauv online uas hloov mus rau qhov kub ntau, xws li -20℃txog 70 degree. Tsis tas li ntawd, cov cuab yeej siv tau yooj yim feem ntau muaj kev tiv thaiv siab (xws li IP67) los tiv thaiv cov huab cua sab nraum zoov.
Niaj hnub nimno turbidimeters feem ntau nruab nrog ntau cov ntaub ntawv sib cuam tshuam, suav nrog RS-485 (txhawb Modbus thiab lwm yam kev cai) rau kev sib koom ua ke, 4-20mA analog tso tawm rau kev sib txuas, thiab cov khoom siv hluav taws xob relay. Rau kev tswj cov ntaub ntawv, USB interface cov ntaub ntawv xa tawm tau txais kev txhawb nqa, thiab qee cov qauv muaj cov ntaub ntawv khaws cia ua haujlwm, cia li khaws cia ntau pua txog ntau txhiab lub sijhawm ntsuas qhov tseem ceeb.
Calibration yog qhov tseem ceeb rau kev ua kom qhov ntsuas qhov tseeb. Turbidimeters txhawb ib qho -point calibration (feem ntau nyob rau hauv qhov ntsuas qis, xws li 0–40 NTU) lossis ntau-point calibration (piv txwv li, 1-point, 2-point, 4-point, lossis mus txog 6-point calibration). Cov txheej txheem tshuaj siv rau calibration yog feem ntau formalin txheem tov; qee cov twj paj nruag kuj muab lawv tus kheej cov txheej txheem rau calibration.
Fais fab mov txawv nyob ntawm seb hom ntsuas. Portable turbidimeters feem ntau siv DC roj teeb (xws li, plaub AAA alkaline roj teeb) thiab tuaj yeem txhawb ntau dua 1200 qhov ntsuas. Benchtop thiab online turbidimeters feem ntau siv AC fais fab (xws li, 220V) lossis DC tswj fais fab adapter.
