CS260955B1 - Conductance measuring cell for liquids' electric conductivity measuring - Google Patents

Description

HaHMeHOBaHHe Η3ο6ρβτβΗΗ «

A K a 3 3 3 3 3 aj 3 3 3 3 3 3 3 l ο ο ο ο ο ο ο ο ο ο ο ο ο x x x x x x x x x x x x x x x x x x x ο ο..... IIOflo6Hbie HSMepHTejIbHbie flaTHUKH Ballad npHMeHHTbCH B XHMHUeC-Kofta τβχκΗκβ, τβχΗαποΓΗΗ npoH3BOflCTBeHHbix npofleccoB 4> H3HKo-xnMHqecKoft Jia6o-paTOpHOň H3MepHTGJIbHOft ΤβΧΗΗΚβ H nOflo6HblX CneííHajIbHbK OĎJiaCTHX flJIH nonyneHHHHa ocHOBe KOHflyKTOMeTpmecKHx HSMepeHHH, HanpHMep, cneflH <j> HHecxHX OTHocHTenb-ho cnocoSa hjih BemecTBa flaHHbix of BefleHHH npoflecca ripple xHMHnecKHX peaxflHHXhjih o CBoncTBax H3MepfleMon cpeflbi.

XapaxTepHCTHKa HSBecTHbix TexHHHecxHX peuieHHň B flenHx onpefleneHHH anexTponpoBOflHocTH, npeHMymecTBeHHo, jkhakhx cpefl H3BecT HBI-CAMBIA paanHHHbie TexHHHecKHe pemeHHH XAX b οτηοπκιηηη coScTBeHHO H3Mepn- TenhHoro naTHHKa, Tax HSMepHTenbnoň cxeMM h. HeaaBHCHMo οτ τογο, HfleT jihpenb of npoTOHHbix hjih norpyjKHbix flaTHHxax, flaTHHxax fínx na6opaTopHoro hjih NPO-MbmmeHHOrO ΠρΗΜβΗβΗΗΗ, O TSKOBbK PflX HenpepblBHbIX HJIH nepHOgHHeCKHX H3Mepe-hhh, npHMeHHeMbie H3MepHTenbHbie αητίηκη ημθιοτ πρηηηηπηηπβηο FLBA n3MepnTenbHO-TexHHuecKH 3φφβκτΗΒκωχ snexTpofla. 0.6A srax snexTpofla, pacnonaratranHecH bo 1BpeMH H3MepeHHit Ha onpefleneHHOM η ΗβΗ3ΜβΗΗθΜ paccTOHHHH flpyr προτΗΒ flpyra, xaxflbiň c oripefleneHHoň hkthbhoh KOHTaxTHoň noBepxHocTbio, orpaHHHHeaioT b NPE-flenax H3MepaeMoň cpeflbí oObeMHuň θπθμθητ, nnoqaflb nonepenHoro ceneHHH χοτορο-ro cooTeeTCTByeT nonepenHOMy ceneHHio snexTpofla and ERO flnHHa - paccTOHHHioMeamy sjíeKTpOffaMH. Ha ocHOBe 3To ΓβοΜβτρΗΗ anexTpoflOB paccHHTbiBaeTCB nocTo-HHHaa Hnnxa xax oTHomenHe paccTOHHHH Mexfly snexTpoflaMH x KOHTaxTHoň ποΒβρχ-hocth anexTpoflOB. Bbi6op nocTOHHHoit HnnxH saBHCHT οτ ofτofof3333 H3MepHTenb-Ho-TexHHHecxOMy onpefleneiuno flHanasoHa anexTponpoBOflHocTH. CneflHanbHhie Hcnón-ΗβΗΗΗ XOHflyKTOMeTpHHeCKHX H3MěpHTejIbHbK flaTHHKOB o6nafíaiOT yCTpoftCTBaMH flHH (OCTHpOBKH Me «fly3JieKTpOflHOro paccTOHHHH, CJtyxanjHMH pflň ycTaHOBKH noCTOHHHOftHneňxH Ha 3aflaHHoe sHaweHHe b npeflenax xoHcTpyxTHBHo saflaHHux rpaHHHHboc 3ha-HeHHH. 260955

HaxoflftinaHCH b H3MepnTejii> Hoan anenx aniflxocTb oxa3biBaeT conpoTHBJiHHe npoxofla-meMy Toxy, BenHHHHa KOToporo cooTBeTCTByeT οτΗοωβΗΗΐο nocTOHHHoft HnnxH hatteKTpolipoBOflHocTH ®hhxocth. 3to conpoTHBJíeHHe onpenejifleTCH NPH aScojiwTHbixH3MepeHHHX KaneCTBeHHO HJIH NPH OTHOCHTeJIbHbIX H3MepeHHHX XOJIHHeCTBeHHO xaxΗ3ΜβΗβΗΗε COIipOTHBJíeHHH ΠρΗ ΠΟΜΟΙφΙ CaMbK pa3HOo6pa3HbJX CXeM (HanpHMep MOC "TOBaH cxeMa c pynHoft hjih aBTOMaranecxoft xoMneHcaimefí, H3M6peHne at Henocpep, -CTBeHHafl HHpHXapHfl nafleHHH HanpjKKeHHH NPH nOCTOHHHOM H3MepHTejIbHOM flow HJIHH3MepeHne h HenocpepcTBeHHap ηηρηκηιιηα npoTexawmero Toxa H3MepHTejibHbiM ρβτ-HHXOM npH nOCTOHHHOM ΗβΠρΑΜβΗΗΗ). fljlfl IIOJiyHeHHH npHrOflHbIX pe3yjIbTaTOB Η3ΜβρβΗΗΗ HeOÓXOflHMO COrjiaCOBaHHe H3-MepuTejibHoro paTHHxa c H3MepHTheaf cxeMoň c yneTOM ocoÓeHHocTen nopjtexa-meň pemeHHK) npo6neM ηβμθρθηηη.

Ecjih b usMepaeMoň CPEP BO3Hnxai0T H3M € H6hhh 3JiexTponpoBopHOCTH nopapxa He-cxojibXHX CTeneHeň Pecara, Torpa ηθο6χορημο MopH <J> HpHpoBaTb cxeMy H3MepeHHHnpH paHHoň nocTOHHHoň aneňxH H3MepHTeJibHoro paTHHxa hjih NPH paHHoň cxeMe H3 MepeHKH pojijkhn 6biTb πρκΜβΗβΗω paanmHbie H3MepHTenbHbie paTHHXH. c pa3Hoo6pa3rHbiMH nocroHHBiMHH * hnxaMH. 3th HepocTaTXH H3BecTHbix TexHHHecxHX pemeHHt Tpe-6yioT b nepBOM cjiynae, Hapapy c bhcoxhmh 33TpaTaMH Ha cxeMy, cjosmoro 3JiexT-pHnecxoro corjiacoBaHHH no oTflenbHbJM nnanasoHaM H3MepeHHn. 3th aaTpara yBejiH-UHBaioTCH, ecjiH cxeMa cjiyMHT opHOBpeMeHHo pjin ynpaBJieHHH περκφερΗίίΗΜΜΗ npn-ĎopaMH. HepocTaTox BToporo nyra penieHHfl aaxjnonaeTCH b ρθηθπππκ κθTHHχTHHHHHXXXXHXXXXXCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCTCT

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UEJibio θ3 6 ε jí jí jí jí jí e e e e e e e H H o o o o o o o ň ň ň ň ň ň ň ň ň ň ň ň ň ň ň eat eat eat eat eat eat eat eat eat eat eat eat eat eat eat eat eat eat eat. H3jio »ehhe cymHocTH H3o6peTeHHa B ocHOBy H3o6peTeHHH nojioxeHa Sahana co3paTb Hecjioxnyio β η3γοτοβηθηηη H3Me-pHTejibHyio flneňxy PNA a6comoTHbix h OTHOCHTeJlbHbK xoHpyxTOMeTpHMecxHx H3Mepe HHR-b flHana3OHe sjíexTponpoBopHocTH, oxBaTbiBamneM Hecxojibxo CTeneHeň pecnra, xoTopaa no3BOJiHJia 6bi npoBepeiiHe H3MepeHHň πρκ ποΜοπρι opHoxpaTHo xoMneHCHpo-BaHHOÉ HSMepHTeJIbHOH cxeMbi.

CornacHO H3o6peTeHHio hundred ocymecTBJíaeTca TaxHM o6pa3OM MTO HMeňxa pjia H3Me-peHHH anexTponpoBOflHocTH HMeeT PNA xaiKRoro noppnana3OHa iirapoxoro pHana3OHa3JiexTponpoBOflHocTH Napa ajiexTpopoB c onpepeJieHHoň nocTOHHHoň HMeňXH, npHMeMnocTOHHHbie HMefíxH HaxopflTca b onpepejieHHOM cooTHonieHHH ppyr x ppyry. B mostxhepixHapixHapixHax HcnoJiHeHHH npepycMOTpeHo, xpoMe τογο, cjiepyiomee.IIocTOHHHbie ηηθηχη nap 3JiexTpopoB HaxopHTCfl b pecflTHMHOM cooTHomeHHH ppyr xppyry.

Bce napu ajiexTpopoB ΗΜβιοτ b xaaecTBe BToporo sjíexTpopa coBMecTHbien ajiexTpop.IlepBbie anexTpopbi cMOHTnpoBaHbí Ha HsojiHTope. ,Τοροή, coBMecTHbiň ajiexTpop npep-CTaBJíHeT co6oň Tpy6y, oxpyxcaiomyjo hsqjihtop h pacnojioMeHHyw xoaxcHajibHo x no-My. IlepBMe ajiexTpopu cxoHCTpynpoBaHbi, HanpHMep, b BHpe cerMeHTOB Tpy6bi hjihxojiep. OflHH xoHep TpySbi BCTaBjeeH bo &amp; naHep H3 HSOJianHOHHoro MaTepnana. 3totφπβΗβιχ cHaGaceH CBepjieHbíM oTBepcraeM hjih npHeMa H3OJiHTopa nepBbix snexTpoflOB.

Bo φπβΗβιι BMOHTHpoBaHa xojibneBafl xaMepa, coe / jHHeHHaH nepe3 nepenycxHbie xa-hajibi c npoMexyTOHHbiM npocTpaHCTBOM 3JiexTpoflHbix nap h co BcacwBaiomHM naTpy6-260955 kom. hojiHTop CKOHCTpyHpoBaH qacraqno b BHfle nonoro flHlHHflpa. B ero BHyT — peHHeM npocTpaHCTBe nponoateHB BBOflb 3ηεκτρο «θΒ, KOTOpbie nepea CBepnenbie ot-BepcTHH H3ojiHTopa npoBefleHbí κ aneKTponaM. flpyroň κοκεμ TpyGu aaKaHHHBaeTCHceTuaTHM ahom. ΠρΗΜβρ OCymeCTBJíeHKg Η3θ6ρβΤβΗΗΗ

Ha npmiaraeMbK pucyHKax H3o6pasceHo cneflyromee: .1ηγ.1: προτοηηηη jmn b paape3e .2ηγ.2: ceqeHHe A-A cornacHO Φηγ.1

Φηγ.3 «narpaMMa shbhchmocth οοπροτηβπθηηη aneKTporrpoBOflHocTH n3Mepn OT-B TentHofl íPieňKH KanecTBe npHMepa ocymecTBneHHH H3o6peTeHHH npeflCTaBneHa npoTonnaa aneňKa.Ha nonoBHHe UHnHHflpHnecKoro HaojiHTopa 1 pacnonoateHu b BHfle cerMeHTOB TpyGw3JieKTpo« bi 4, 5, 6, oTfleneHHbie flpyr ot flpyra mejiHMH seventh flpyraa nonoBHHa HaOn-Top 1 BCTaBtfeHa b CBepněHoe OTBepcrae 22 (jmaiifla 2 H3 HsonaipiOHHoro MaTepna-on. Onanefl 2 yKpenneH Ha οτβΗΚβ peaépByapa 3 Tokhi o6pa3OM, ητο aneKTpoflu, 4, 5, 6 b ^ ajoTCfl b nonocTb peaepsyapa. CoBMecTHuň aneKTpofl 8 b φορΜβ Tpy6uoKpyataeT Η3οπητορ 1 c aneKTpoflaMH 4, 5, 6, πρηηθμ Meatfly hhmh saxmoneHo NPO-MejKyTOHHoe npocTpaHCTBo 11th Oahhm kohaom Tpy6a BCTasneHa b H3ojihtop first OHapacnonoaceHa KoaKCHanbHo κ H3on «tops first Kaatflbiň H3 sneKTpofloB 4, 5, 6-oGpasy βτ ΒΜβοτβ c coBbiecTHbíM aneKTpoflOM 8 aneKTpoflHyio napy 4-8, 5-8, 6 - 8.BennHHHa κοητακτημχ noBepxHOCTen aneKTpoflOB 4, 5, 6 h paccTOHHHH flo coBMecr-ηογο aneKTpofla 8 nofloCpaHM TaKHM oGpaaow, hto nocToaHHue ayneKH C4; C2; C5HaXORHTCH B COOTHOHieHHH 1 ί 10 Ϊ 100. H3onaropa 1 nn6o nonoro ufmitwpa.3aKaHU »BaeTCfl sanopHoň kpmuikoh 17th HIPE Hee npoeefleH coeflHHHTenbHbiň xaGenb20, BKJWíatantHň bboau sneKTpoflOB 14h noflBOflamHe nposofla 19 aah pa3MemeHHorcB flHe 16 TewnepaTypHoro ρ, Άτνακα 18th Ββοαη aneKTpofloe 14 npoTHHy.TM κ βπβκτ-; poflaw 4 5, 6 uepea cBepneHbie oTBepcTHH 15 b H3onHTope 1.

Bboa Vtn coBMecTHoro anctpofla 8 ae H3OpaaceH. ΦηβΗβη 2 CHaGateH KonbfleBowKawepoft 9, KOTopaa nocpeflCTBOM nepenycKHHX κβηηποβ 10 coeflHHeHa c npoMeacy-tohhum npocTpaHCTBOM 11 h npHCoeflHfleHa κ BcacMBaromeMy naTpy0Ky 12 *

YflaneHHUn οτ φπβΗίχε κοΗβιχ coBMecTHoro aneKTpofla 8 3aKp «T cernaTUM ahom 21.ΠροτοΗΗβΗ jraenKa φγΗκίριοΗΗργβτ cneflyioinHM oOpaaoM. Ee BcacbraaiomHH naTpyčoK12 ΠρΗΟΟββΗΗβΗ ΠρΗ ΠΟΜΟΠρί rHĎKpy TpyCKH κ Hacocy.

Ha ocHOBamíH BcacuBamuero neňcTBHH Hacoca noflneatamaH HSMepeHHio acHflKocTb ne-pe3 οετηβτοε aho 21 aacacbiBaeTcn H3 nonócTH peaepByapa b npoMeacyTonHoe npo-cTparicTBo 11 αNKKH.

BcocaHHaa acHflKocTb oépaayeT yuacToK aneKTponHTHHecKoro οοπροτΗΒΠβΗΗΗ pjtanap aneKTpoflos 4-8, 5-8, 6-8. OnpeflenHKHUHMH flna aneKTpHnecKoro conpoTHB-JieHHH HflH 3JieKTponpOBOflHOCTO HBAHMTCH KOHTaKTHbie IIOBepXHOCTH SneKTpOflOB 4, 5, 6 h paccTOHHHH Meacny hhmh η 3πεκτρορ; οΜ 8. H3MepHTenbHoň cxeMe noflKnio-naéTca τοπβκο no oflHoň aneKTpoflOB overvoltages. 9το ocymecTBJíHeTCH πρκ πομοπιη nepe-KmonaTen flHanasoHoB, Haxoflameroca Meatfly coeflHHHTenbHWM KaSeneM 20 h n3MepH'TeJibHoň cxeMoň. Bu6op napu 4-8, 5-8, 6-8 h, TeM caMbiM, pineapple OHasneKTPonpoBOflHocTH qejiecooGpasHMM oGpaaoM npoH3BOflHTca πρκ ποΜΟπρι cTpertOM-ΗΟΓ0 Η3ΗΤβρΗΤβΠΒΗ0Γθ npHĎOpa. ΕθΠθ ΠρΗ ΠΟΗΗΚβΗΗΗ 3JieKTpOnpOBOflHOCTH CTpejIKa 260955 '- 4 - flocraraeT nponenbHoro otkjiohghhh, npon3BonnTCH περεκπιοηεΗΗε Ha cnenyioruHnfHana3OH. Ecjih sncKTponpoBoflHOCTb yBenHHHBaeTCH HacTonbKo, οτκλοηθηηθηηηθηηθηηθηηθCTCTejejHHHMMMMMMMM nobbbbbbbbbbbbbΗΗΗΗΗ Tor Tor Tor Tor Tor Tor Tor Tor Tor Tor Tor Tor, TeM caMbiM nyBCTBHTcnbHocTb noBbiiuacTCH HaK03φφΗΐριεΗΤ 10.

Ha .3ηγ.3 npeflcTaBneHa nuarpaMMa 3hbhchmocth 3ηεκτρΗηεοκοΓοCOnpOTHBJieHHH R SnOKTpOHHbK nap 4-8, 5-8 H 6-8 C COOTBeTCTByromHMH nOCTOHH “HblMH ΗΗββΚ C4, C2, Cj OT SJiEKTponpOBOflHOCTH ξ.

OopMyna Η3θ6ρετεΗΗΗ first HneňKa ηππ H3mgpghhh 9ηεκτροπρόΒοηΗθοτΗ «ηηκοετεή, oTíinnaranaflCH τβΜ, ητοηηΗ Kawfloro noflflHana3OHa umpoKoro flHana3oHa Η3ΜερεΗΗϋ hmggtch Napa 9πεκ-τροηοΒ (4-8, 5-8, 6-8) c onpenencHHOH ποοτοηηηοη hhchkh (C4, C2, C3), ρ K K K K K K K K K K K K ax l K K K K K K K K K K K o o o o o o C4 C4 C4 C4 (C4, CΗΗΟΜ, C3). HHGHKH (C4, C <, Cj) HaXOflHTCH B fl8CHTHHHOM COOTHOmeHHHnpyr κ npyry (C4, C2, C3 = 1: 10: 100). 3 h 2, 2, 2, 3, 3, 3, 3, 4, 6, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 8 Fourth HneňKa ajih h3mgpghhh 9JiGKTponpoBonHocTH well nyHKTaM 1-3 OTJiHwaioiuaHCJi τβΜ, ητο nopBbia θπεκτροηω (4, 5, 6) CMOHTHpoBaHbí Η3οπητορε IIa (1), and HBM-coBMecT 3ηεκτροη (8) πρεηετεΒηηετ co6oň Tpy6y, OKpyjKaromyra Η3οππτορ (1) n pac-nojioHceHHyio KoaKcnajibHO κ H8My. 5. HnaňKa hjih H3MepeHHH οπεκτροπροΒοηποετΗ no nyHKTy 4, oTJiHnaiomaHCH tom, ht περΒΗε 9ηεκτροηω (4, 5, 6) CKOHCTpynpoBaHbí b BHne TpyČHbix εετΜεκτοΒ. 6. RnaňKa flnn hsmgpghhh 3ηετροπροΒοηΗοετη no nyHKTy 4, orannajomancH tom, hto περΒωε οηεκτροηω (4, 5, 6) CKOHCTpynpoBaHbí b BHne κοηεη. 7th Αηεηκε hjih Η3ΜερεΗΗΗ 9ηεκτροπροΒοηΗοετΗ well nyHKTaM 1-4 OTHHnawmaHCHτεΜ, HTO oftHH KOHep Tpy6bi, cnyxcameíí b κεηεετΒε cobmgcthoto aneKTpona (8) bo BCTaBJíeH φηβΗβη (2) H3 HsonHiíHOHHoro MaTapnana, οΒερηεΗοε οτΒβρετΗε (22) κοτοροΓο npHHHMaaT h3ojihtop (1) η ίτο bo φπεΗεη (2) βμοητηροββηηKOJibiíOBaH KaMapa (9), οοεηηΗεΗΗβΗ what BcacbiBawmnM naTpyóKOM (12) h, nepc3nponycKHbie KaHanbi (10), c npoMcacyTOHHbíM npocTpaHCTBOM (11) ancKTponHbixnap (4-8, 5-8, 6-8). 8th Ηηεήκβ nnn H3MepeHHH sjíeKTponpoBonHocTH well nyHKTaM 1-4 h 7 OTJinnaiomaHCHΤβΜ, HTO H3OHHTOP (1) BbinOJIHCH HaCTHHHO B BHfle ΠΟΗΟΓΟ UHJIHHflpa, BO-BHyT ρβΗΗβΜ npOCTpaHCTBG (13) ΚΟΤΟΡΟΓΟ nponOXGHbl BBOnbI SJíeKTpOflOB (14) npOTH-HyTbic Hcpe3 cBcpneHbie otbopcthh (15) b H3OJiHTope (1) κ ncpBBM anEctPonM (4, 5, 6). 9. JŇeňKa «South h3mgpghhh gjiGKTponpoBOflHocTH no nyHKTaM 1-4, and Taxis 7 h 8; 260955-5 - ΑΗΗΟΤβΐφΐΗ Η3θ6ρβτβΗΗβ KacaeTCH Flat-HKA ηπη H3MepeHHH 3πβκτροπροΒθΑΗοετΗ acnflKocTeň.ΠοΗοβΗΗβ «^ aT HKH Moryr npHMeHHTbCH b xHMHHecKoň τβΧΗΗΚβ, TexHojiomH npoH3 BOflCTBeHHbK npOUeCCOB-B-φΗ3ΗΚΟ ΧΗΜΗΊβΟΚθϋ Jia6opaTOpHOÉ H3MepHTeJlbHOň ΤβΧΗΗ-κβ. B ochoby Η3θ6ρβτβΗΗ «6bina nonoaceHa 3anana co3fcaTb Soak ajih a6co.nioTHbixH OTHOCHTejIbHblX ΚΟΗΑγΚΤΟΜβΤρΗΗβΟΚΗΧ H3MepeHHH Β OXBaTblBaromeM HeCKOJIbKO CTE-neHeft flecHTH nuanaaoHOB sjíeKTponpoBOflHOCTH, no3BOjiHioiněM npoBeneHHe H3Mepe-HHN ΠΡΗ ΠΟΜΟηΐΗ OflHOKpaTHO ΚΟΜΠβΗΟΗρΟΒβΗΗΟϋ HSMepHTeJlbHOň CXeMbl. CorJiaCHQΗ3θ6ρβτβΗΗΐο npeflycMOTpeHo, HTO Hqeňxa "south H3MepeHHH 3jieKTponpoBOflHocTH HME-ετ Kaatfloro noflflnanasoHa nmpoKoro gHanaaoHa ajieKTponpoBOffHocTH Napa anexτροηοΒ c onpenejieHHoft nocTOHHHoň HneňKH, πρηηβΜ nocTOHHHbie HHeňKH HaxoflHTcab onpenejieHHOM cooTHOiueHHH flpyr κ flpyry. - .1ηγ.1 - Πρθ3ΗβΗΟ θ3θ6ρβΤβΗΗβΜ ΠΟ peayjIbTaTaM 3KCnepTH3bI, OCymeCTBJíeHHOň BeflOMCTBOMno flenaM Η3θ6ρβτβΗκώ η πβτβΗτοΒ CHP. 3 nepTeaca 260955

Claims (9)

OBJECT OF THE INVENTION 1. A conductivity cell for measuring electrical conductivity, characterized in that it has for each sub-range a wide measuring range of a pair electrode (4 and 8.5 and 8.6 and 8) with a defined constant (Cj, Cg, O ^) a specific conductivity cell, said constants (C 1, C 8, C 6) being in a defined ratio with each other. 2. The conductivity cell according to claim 1, wherein the constants (Cj, Cg, Cy) of the conductivity cell are in a decimal ratio of 1s10s100. 3. A conductivity cell according to claim 1, characterized in that all the electrode pairs (4 and 8.5 and 8.6 and 8) have a common electrode (8) as the second electrode. 4. The conductivity cell according to claim 1, wherein the first electrodes (4, 5, 6) are disposed on the insulating body (1) and the common electrode (8) is formed as a tube surrounding the insulating body (1) with which it is -axis. 5. Conductivity cell according to claim 4, characterized in that the first electrodes (4, 5, 6) are formed as tubular segments. 6. A conductivity cell according to claim 4, characterized in that the first electrodes (4, 5, 6) are formed as rings. 260955 - 7 - 7. Conductivity cell according to claim 1, characterized in that the end of the common electrode tube (Θ) is embedded in a flange (2) of insulating material which clamps in the insulating bore (22). the body (1) and the flange (2) are annular crown (9), which is connected by suction neck (12) and connected to the electrode pair (4 and 8.5 and 8.6) via the connecting channels (10) and 8). 8. Conductivity cell according to Claims 4 and 7, characterized in that the insulating body (1) is formed in part by a cylindrical roll into which the first electrodes (4, 5, 6) are led (14) which lead to the first electrodes (4, 5, 6) through the bores (15) in the insulating housing (1). 9. The conductivity cell according to items 1, 3, 4 and 7, characterized in that the end opposite the flange (2) of the common electrode (8) is closed by a screen bottom (21). 260955