Hluav taws xob cov ntsuam uas tsis yog-hluav taws xob qhov tseem ceeb

Hluav taws xob cov ntsuam muaj siab raug, kev cia siab, simplicity thiab cheapness. Yog li ntawd, hluav taws xob pab kiag li lawm tau lug siv nyob rau hauv cov kev ntsuas thiab uas tsis yog-hluav taws xob ntau.

Cov hluav taws xob system uas ntsuas ib tug uas tsis yog-hluav taws xob muaj nuj nqis muaj pib kawm xws li: cov sensor (transducer), lub intermediate ntaus ntawv thiab qhia.

Hluav taws xob cov ntsuam nonelectrical ntau - qhov no yog yeej tseem zoo lub hloov dua siab tshiab sensor nonelectrical ntau, hais tias, kev hloov nyob rau hauv lub kua theem, ceev, kub, thiab lwm yam, ib tug kev hloov nyob rau hauv qhov hluav taws xob ntau yam: impedance, voltage los yog tam sim no, lub measured qhov taw qhia, uas yog ib tug yooj yim hluav taws xob khoom siv ...

Cov uas siv rau hluav taws xob ntsuas yog muab faib ua ob pawg:

• analog ( "tseshki") - nyob rau hauv uas qhov ntsuas tshwm sim rau lub scale ntawm kev ntaus ntawv qhia los ntawm cov xib xub;

• cov - lawv yog cov analog-rau-digital converter converts lub tswv yim teeb liab mus rau hauv ib cov nqi thiab qhia nws nyob rau hauv LCD zaub.

Niaj hnub no, cov khoom siv tau hloov analog, tej zaum koj yuav hais tias, kiag li, vim hais tias, ua ntej ntawm tag nrho cov:

• lawv yog ib qho yooj yim mus siv (li opposed rau analog (xub), lawv tsis muaj xws li ntsuas raws li ntawm los yog muab qhab-nees scale ntawm lub twj paj nruag, uas yuav tsum hais);

• lawv yog cov ntau ntau muaj tseeb analog.

Nws yuav tsum tau muab sau tseg, thiab kom zoo dua ntawm xws li: hluav taws xob ntsuas cia rau kev soj ntsuam uas tsis yog-hluav taws xob qhov tseem ceeb, txawm nyob rau hauv ib qho nyuaj mus cuag qhov chaw los yog nyob rau ib tug deb deb.

Xav txog ob tej piv txwv ntawm yuav ua li cas nqa tawm hluav taws xob ntsuas kev siv li ntsuas qhov uas tsis yog-hluav taws xob muaj nuj nqis.

Ntoo dej meter

Txij li thaum ntoo - hygroscopic khoom, nrog ib tug kev hloov nyob rau hauv ib puag ncig tsis hloov nws av noo - ib qho ntawm lub thaj chaw ntawm cov ntoo, uas yog tseem ceeb heev thaum siv nyob rau hauv lub tiav lawm cov khoom. Yog li ntawd, cov ntoo yog qhuav mus rau ib tug uniform lub xeev uas muaj ib tug saib kom yav tom ntej kev khiav hauj lwm tej yam kev mob.

Ib tug ntawm cov hau kev rau kev ntsuas nws cov dej ntsiab lus yog siv elektrovlagomerov. Lub hauv paus ntsiab lus ntawm cov lag luam ntawm lub dej meter yog los ntsuas humidity, raws li nyob rau hauv - qhov hluav taws xob zog. Nrog lub ntaus ntawv, koj muaj peev xwm txiav txim nws sai sai tsis muaj kev rhuav tseg cov ntoo.

Ya meters yog ob hom:

• Koob - lawv yog raws li nyob rau hauv kev ntsuas ntawm lub fais kuj;

• capacitive (contactless) - lawv yog raws li nyob rau hauv cov kev sib raug ntawm dielectric qhov thiab ya raws. Cov dej meters muaj sensors uas tsis yuav tsum tau cov kev taw qhia ntawm koob mus rau hauv cov ntoo. Yog li ntawd, rau ntawm qhov chaw ntawm tus ntoo tawm hauv tsis muaj residue tom qab ntsuas, uas, ntawm chav kawm, lawv ib qho kev zoo nta nyob rau hauv no hwm los ntawm hydrometers koob.

meter nitrates

Nitrates - cov no yog cov ib co ntawm cov tshuaj tebchaw uas yog cov feem ntau txaus ntshai vim hais tias lawv yuav ua tau ib qhov chaw ntawm loj ua txhaum ntawm tib neeg lub cev. Thaum cov khoom noj khoom haus nyob rau hauv loj qhov ntau nyob rau hauv tib neeg lub cev, lawv yuav ua rau nitrate lom, ntau yam kab mob mus ntev thiab mob.

Tsis muaj sij hawm-siv thiab kim txheej txheem ntawm nitrate nrhiav kom tau yog tam sim no siv me me tshwj xeeb ntaus ntawv - nitrate.

Nitratomers tsim los ntsuas nyob rau hauv txiv hmab txiv ntoo, cov zaub thiab tshiab nqaij nyob rau hauv lub nitrate ntsiab lus. Lub hauv paus ntawm lub lag luam yog ntsuas ion kev ua si electrode system direct potentiometric txoj kev, cov kev tshwm sim ntawm uas yog hloov dua siab tshiab rau hauv ib qho hluav taws xob lub teeb liab xwm yeem mus rau ion concentration ntawm NO3.

tshwj xeeb hu sojntsuam (sojntsuam) yog muab rau defining thiab ntsuas txoj kev nitrate khoom lancing ntaus ntawv.

Nitrate - cov suab paj nruag. Nws ntsuam muaj tso tawm rau ib tug yooj yim xim zaub.