Raws li cov cuab yeej siv rau kev ntsuas qib kua thiab tso saib, cov kua theem transmitters tau siv dav hauv kev siv engineering vim lawv qhov yooj yim ntawm kev teeb tsa, ntsuas qhov tseeb, thiab lub neej ua haujlwm ntev. Feem ntau siv hom kua theem transmitters hauv kev ua haujlwm niaj hnub suav nrog submersible kua theem transmitters, ib qho -flange kua theem transmitters, dual-flange kua theem transmitters, thiab RF capacitance kua theem transmitters.
Cov yam ntxwv thiab kev xaiv cov kua theem Transmitters
Muab ntau yam ntawm cov kua theem transmitters muaj nyob -thiab qhov tseeb tias txhua hom yuav tsum tau txiav txim siab tshwj xeeb nyob ntawm daim ntawv thov ib puag ncig- peb lub tuam tsev tsim thiab kev ua haujlwm yuav tsum nkag siab txog cov khoom tshwj xeeb ntawm txhua hom los txiav txim siab thiab tsim nyog xaiv thaum lawv ua haujlwm txhua hnub.
1. Tib -Flange Liquid Level Transmitters
Tib -flange kua theem transmitters muaj nyob rau hauv ob qho kev teeb tsa: tiaj- flange thiab flange nrog lub raj ntxig. Ob hom ntsuas kua theem siab los ntawm kev siv lub siab hydrostatic (lub ntiajteb txawj nqus) ntawm qhov nruab nrab ntsuas. Tib -flange kua theem transmitters yog tsim rau cov xov xwm uas muaj viscosity siab los yog ib tug nyiam crystallize; lawv feem ntau yog ntsia rau ntawm qhib- cov nkoj sab saum toj lossis cov khoom siv.
2. Dual-Flange Liquid Level Transmitters
Dual-flange kua theem transmitters yog ib hom kev sib txawv siab transmitter uas muab cov kev ntsuas kev ntsuas txhim khu kev qha los ntawm kev tiv thaiv qhov nruab nrab ntsuas los ntawm kev sib cuag ncaj qha nrog lub transmitter lub diaphragm cais. Lawv cov khoom siv tseem ceeb yog nyob rau hauv daim ntawv thov qhov twg: siab -kub xov xwm yuav tsum raug cais tawm ntawm lub transmitter; qhov nruab nrab yog corrosive rau lub transmitter lub ntsiab lus; qhov nruab nrab muaj cov khoom raug tshem tawm los yog muaj kuab heev; qhov nruab nrab tuaj yeem ua kom khov lossis crystallize vim qhov kev hloov pauv ntawm qhov kub thiab txias; los yog kev tu nruj ntawm lub taub hau ntsuas yuav tsum tau thaum hloov ntawm cov xov xwm sib txawv. Dual-flange kua theem transmitters feem ntau yog siv los ntsuas cov qib kua hauv cov hlab ntim siab.
3. Submersible Liquid Level Transmitters
Submersible kua theem transmitters muaj nyob rau hauv ob configurations: pas nrig-hom thiab cable- hom. Lawv lub hauv paus ntsiab lus ntawm kev khiav hauj lwm yog raws li qhov tseeb tias hydrostatic siab ntawm cov kua yog ncaj qha proportional rau nws qhov siab (qhov tob). Los ntawm kev siv cov nyhuv piezoresistive ntawm diffused silicon los yog ceramic sensing ntsiab, lawv hloov lub siab hydrostatic rau hauv hluav taws xob teeb liab. Ua raws li qhov ntsuas kub thiab qhov kev hloov kho linearity, qhov teeb liab no tau hloov mus rau hauv tus qauv 4-20 mA DC tam sim no tso zis. Vim nws qhov yooj yim thiab yooj yim ntawm kev teeb tsa, nrog rau nws qhov kev hloov pauv tau zoo, lub tshuab xa hluav taws xob no muaj peev xwm ua tau zoo - kev ntsuas qhov tseeb ntawm ntau yam xov xwm - los ntawm dej thiab roj mus rau cov kua nplaum siab heev - yam tsis muaj kev cuam tshuam los ntawm foaming lossis sedimentation hauv nruab nrab ntsuas. Nws feem ntau yog siv rau kev teeb tsa hauv qhib - cov nkoj sab saum toj lossis cov khoom siv.
4. RF Capacitive Theem Transmitter
Lub hauv paus ntsiab lus ntawm kev khiav hauj lwm ntawm RF capacitive theem transmitter yog nyob ntawm qhov tsim ntawm lub capacitor ntawm qhov kev sojntsuam thiab cov kua conductive. Nyob rau hauv no configuration, cov hlau tseem ceeb ntawm lub sojntsuam pas nrig ua hauj lwm raws li ib tug electrode ntawm lub capacitor, thaum lub conductive kua ua raws li lwm yam electrode; qhov chaw nruab nrab ntawm lawv yog nyob ruaj khov polytetrafluoroethylene (PTFE) -tshwj xeeb, lub insulating txheej sheath ntawm lub sojntsuam pas nrig- uas ua hauj lwm raws li dielectric nruab nrab ntawm ob electrodes. Raws li cov kua theem fluctuates, thaj tsam ntawm qhov kev sojntsuam pas nrig immersed nyob rau hauv cov kua hloov, yog li altering qhov zoo ntawm qhov chaw ntawm lub capacitor electrodes. Yog li ntawd, thaum cov kua theem nce, lub capacitance nce; lub RF Circuit Court ces converts qhov kev hloov no nyob rau hauv capacitance mus rau hauv ib tug analog tso zis teeb liab. Rau RF capacitive theem transmitter, ntsuas qib nyob rau hauv siab -kub, siab - cov hlab ntsha siab yog ib qho yooj yim raws li kev ntsuas qib raws li tus qauv kub thiab siab; Tsis tas li ntawd, qhov ntsuas qhov ntsuas tseem tsis cuam tshuam los ntawm qhov kub thiab txias, lub ntiajteb txawj nqus tshwj xeeb, lossis muaj pes tsawg leeg ntawm cov kua ntsuas, lossis los ntawm cov duab lossis qhov siab ntawm lub nkoj. Cov cuab yeej no feem ntau yog siv rau kev ntsuas qib uas muaj cov kua qaub thiab cov hauv paus, chlorides, cov kuab tshuaj organic, kua CO2, aqueous ammonia, PVC hmoov, ya tshauv, roj- dej sib txuas, cov tshuaj suav tshuaj, thiab cov xov xwm zoo sib xws.