Umhlahlandlela Wokugcina Wokukhetha I-Silicon Pressure Transmitter Esabalalisiwe
Isiqondiso sochwepheshe sezicelo zokulinganisa zezimboni
Uhlolojikelele
Ama-pressure transmitters ahlukaniswa ngobuchwepheshe bawo benzwa, okuhlanganisa i-silicon esabalele, i-ceramic, i-capacitive, ne-silicon ye-monocrystalline. Phakathi kwalokhu, izidluliseli ze-silicon ezisabalalisiwe yizona ezamukelwa kabanzi kuzo zonke izimboni. Zaziwa ngokusebenza kwazo okuqinile, ukwethembeka, nokusebenza kahle kwezindleko, zilungele ukuqapha nokulawula ingcindezi kuwoyela negesi, ukucubungula amakhemikhali, ukukhiqizwa kwensimbi, ukukhiqiza amandla, ubunjiniyela bemvelo, nokunye.
Lawa ma-transmitter asekela izilinganiso ze-gauge, absolute, kanye ne-negative pressure—ngisho nasezimweni ezibolayo, ezinomfutho ophezulu, noma eziyingozi.
Kodwa lobu buchwepheshe buthuthuke kanjani, futhi yiziphi izici okufanele uzicabangele lapho ukhetha imodeli efanele?
Umsuka Wobuchwepheshe Be-Silicon Esabalalisiwe
Ngawo-1990s, i-NovaSensor (USA) yethula isizukulwane esisha sezinzwa ze-silicon ezisatshalalisiwe zisebenzisa ubuchwepheshe obuthuthukisiwe be-micromachining kanye ne-silicon bonding.
Umgomo ulula kodwa uyasebenza: ingcindezi yenqubo ihlukaniswa yi-diaphragm futhi idluliselwe ngamafutha abicah avaliwe kulwelwesi lwe-silicon olubucayi. Ngakolunye uhlangothi, ukucindezela komkhathi kusetshenziswa njengereferensi. Lo mehluko ubangela ukuba ulwelwesi luwohloke—olunye uhlangothi lunwebeka, olunye lucindezele. Amageji ohlobo ashumekiwe athola lokhu kuguquka, akuguqule kube isignali kagesi enembile.
8 Amapharamitha Abalulekile Wokukhetha I-Diffused Silicon Pressure Transmitter
1. Izimpawu Ezimaphakathi
Imvelo yamakhemikhali neyomzimba yoketshezi lwenqubo ithinta ngokuqondile ukuhambisana kwezinzwa.
Kuyafaneleka:Amagesi, uwoyela, uketshezi oluhlanzekile - ngokuvamile kuphathwa ngezinzwa zensimbi engagqwali ezijwayelekile ezingu-316L.
Okungafaneleki:Imidiya egqwala kakhulu, i-viscous, noma ecwebezelayo — lokhu kungase kuvale noma kulimaze inzwa.
Izincomo:
- Uketshezi olubonakalayo/ olucwebezelayo (isb., ama-slurries, ama-syrups): Sebenzisa ama-diaphragm transmitter ashaywayo ukuze uvimbele ukuvaleka.
- Izinhlelo zokusebenza ezihlanzekile (isb, ukudla, ikhemisi): Khetha amamodeli we-tri-clamp flush diaphragm (≤4 MPa ukuze ufakwe ngokuvikelekile).
- Imidiya esebenza kanzima (isb, udaka, itiyela): Sebenzisa ama-diaphragm angenawo umgodi, anomfutho wokusebenza omncane ongu ~2 MPa.
⚠️ Isexwayiso: Ungathinti noma ukunwaya i-diaphragm yenzwa — ithambile kakhulu.
2. Ibanga Lokucindezela
Ibanga lokulinganisa elijwayelekile: –0.1 MPa ukuya ku-60 MPa.
Ngaso sonke isikhathi khetha isidlulisi esikalwe kancane ngaphezu kwengcindezi yakho ephezulu yokusebenza ngokuphepha nokunemba.
Ireferensi yeyunithi yokucindezela:
I-MPa engu-1 = ibha engu-10 = 1000 kPa = 145 psi = 760 mmHg ≈ ikholomu yamanzi engamamitha angu-100
I-Gauge vs. Absolute Pressure:
- Ingcindezi yegeyiji: kubhekiselwa kumfutho womoya we-ambient.
- Ukucindezela okuphelele: kubhekiselwa ku-vacuum ephelele.
Qaphela: Ezifundeni eziphakeme kakhulu, sebenzisa ama-gauge transmitter (amashubhu okukhipha umoya) ukuze unxephezele umfutho wendawo womkhathi lapho ukunemba kubalulekile (
3. Ukuvumelana kwezinga lokushisa
Ibanga elijwayelekile lokusebenza: -20°C kuya +80°C.
Ngemidiya yezinga lokushisa eliphezulu (kufika ku-300°C), cabanga:
- Amaphiko okupholisa noma amasinki okushisa
- Izimpawu ze-diaphragm ezikude ezinama-capillary
- Ishubhu yomfutho ukuze uhlukanise inzwa ekushiseni okuqondile
4. Ukunikezwa kwamandla
Ukunikezwa okujwayelekile: DC 24V.
Amamodeli amaningi amukela i-5–30V DC, kodwa gwema okokufaka okungaphansi kuka-5V ukuze kuvinjelwe ukungazinzi kwesignali.
5. Izinhlobo Zesiginali Yokukhipha
- 4–20 mA (2-wire): Izinga lemboni lokudluliswa kwebanga elide nokungaphazanyiswa
- 0–5V, 1–5V, 0–10V (3-wire): Ilungele izinhlelo zokusebenza zebanga elifushane
- I-RS485 (yedijithali): Okokuxhumana kwe-serial kanye nezinhlelo zenethiwekhi
6. Izinqubo Zokuxhumanisa Izintambo
Izinhlobo zochungechunge olujwayelekile:
- I-M20×1.5 (metric)
- I-G1/2, G1/4 (BSP)
- M14×1.5
Qondanisa uhlobo lochungechunge nezinkambiso zomkhakha kanye nezidingo zemishini yesistimu yakho.
7. Ikilasi Lokunemba
Amaleveli okunemba ajwayelekile:
- ±0.5% FS – ejwayelekile
- ±0.3% FS - ngokunemba okuphezulu
⚠️ Gwema ukucacisa ±0.1% FS ukunemba kwama-silicon transmitters ahlakazekile. Azilungiselelwa umsebenzi onembe kakhulu kuleli zinga. Esikhundleni salokho, sebenzisa amamodeli e-silicon e-monocrystalline kuzicelo ezinjalo.
8. Ukuxhunywa kukagesi
Khetha ngokusekelwe ezidingweni zakho zokufaka:
- I-DIN43650 (Hirschmann): Ukubekwa uphawu okuhle, okuvame ukusetshenziswa
- Ipulaki yendiza: Ukufakwa kalula nokushintshwa
- Intambo yentambo eqondile: Iqinile futhi imelana nomswakama
Ukuze usebenzise ngaphandle, khetha izindlu zesitayela ezingu-2088 zokuvikela isimo sezulu esithuthukisiwe.
Ukucatshangelwa Kwamacala Akhethekile
Q1: Ngingakwazi ukukala igesi ye-ammonia?
Yebo, kodwa kuphela ngezinto ezifanele (isb, i-Hastelloy diaphragm, PTFE seals). Futhi, i-ammonia iphendula ngamafutha abicah—sebenzisa amafutha ane-fluorinated njengoketshezi lokugcwalisa.
Q2: Kuthiwani ngemidiya evuthayo noma eqhumayo?
Gwema uwoyela we-silicone ojwayelekile. Sebenzisa amafutha ane-fluorinated (isb, i-FC-70), anikeza ukuqina okungcono kwamakhemikhali nokumelana nokuqhuma.
Isiphetho
Ngenxa yokwethenjwa kwabo okuqinisekisiwe, ukuguquguquka, kanye nokusebenza ngempumelelo kwezindleko, ama-transmitters we-silicon asakazwayo ahlala eyisixazululo kuzo zonke izimboni ezahlukahlukene.
Ukukhetha ngokucophelela okusekelwe kokuphakathi, ingcindezi, izinga lokushisa, uhlobo lokuxhuma, nokunemba kuqinisekisa ukusebenza okuphelele nokuqina kwesikhathi eside.
Udinga usizo lokukhetha imodeli efanele?
Sitshele isicelo sakho—sizokusiza ukuthi uthole okufanelana kahle kakhulu.
Isikhathi sokuthumela: Jun-03-2025