electrodos comerciales
DESCRIPTION
electrodo comerciales electroquimicaTRANSCRIPT
-
Electrode Handbook pH ORP ISE
-
page|02
Corporate Profile
| Customer Focus | EveryEutechinnovationisconceptualisedwiththeuserinmind.This,coupledwithourstrategiclocationinthedesignandtechnologyhubofAsia,hasenabledthecompanytoproducecuttingedgeinstrumentsatcompetitiveprices.Ourconsistentdemonstrationof insight intocustomerneedsandproductdemandshasearnedthecompanyconsecutiveFrost&SullivanMarketEngineeringawards forProductLineStrategy.
DrivenbyasuccessfulTotalCustomerSatisfactionProgramincorporatedin the ISO9001:2000Quality System, all productsundergoextensivetesting and calibration by a qualified team of technical experts.Stringentquality controlmeasuresguarantee consistency,durabilityandperformance.Eutechproductsarecertifiedtocomplywithvariousglobaltestingstandards.
| Forging New Frontiers in Water Analysis | Underlying Eutechsobjective to be a world leader in the field of water analysisinstrumentation,thecompanyadoptsaproactivestandinanticipatingtheneedsoftheindustry.Withincreasingglobalawarenessandconcernforwaterquality,thefutureprovidesnewandexcitingchallengesandopportunities.To realize thepotential of advancedwater analyticaltechnologies, Eutechwill continue to forge close links and strategicallianceswith research institutions,governmentagenciesandprivatesectorfirmsworldwide.TheseeffortssupporttheEutechmissiontomakeadvancedtechnologyeasytouse.
| Global Reach | Eutechproductsaremarketedinoverseventycountriesworldwide,throughanextensivenetworkofassociatecompaniesanddistributors,withmanufacturing facilities in Singapore andMalaysia.EutechInstrumentsSingaporehasafull-fledgedvalue-chainoperationwhichcomprisesR&D,manufacturing,marketing,customerserviceandlogisticsforworldwidesupporttocustomers.
| Over 15 Years of Product Excellence |EutechInstrumentsisaleadingISO9001-certified company established in 1990. Dedicated to thedesignandmanufactureofsensor-basedinstrumentsforwaterqualityanalysis, Eutech is a pioneer in the development of ASIC-based(ApplicationSpecificIntegratedCircuit)instruments,andisinternationallyrecognised for its achievements in sensor technology, softwareprogrammingandproductdesign.Eutechhasanextensiveproductline,whichincludestheworldsfirstWindowsCE-drivencolourtouchscreenresearch-gradebenchmeter, aswell as instrumentswithproprietarypatentsandtrademarks.
| Commitment to R&D |Eutechscompetitivenesscomesfromourstrongcommitment toR&D.This isbackedbyadedicatedteamofscientistsandengineerswhothrivesonmeetingnewtechnologicalchallengestosimplify laboratoryandfieldanalyticalprocedures.TheEutechteamisconstantlydriventoexplorethelatesttechnologiesandapplyingtheminourdesignandmanufactureofadvancedinstruments.Theresultisauniquelineofproductsthatareaccurate,consistent,reliableandeasytouse.
| Comprehensive Product Line |Eutechsconstantdriveforinnovationisreasonforouruniqueandexpansiveportfolioofmicroprocessor-basedinstrumentsandchemical sensor systems.Weoffer a comprehensiverange of laboratory and field instruments for electrochemical andphotometricwateranalysis.Eutechalsomanufacturescontinuouson-lineprocessinstrumentsforthemonitoringandcontrolofpH,Conductivity,TotalDissolvedSolids (TDS),RedoxPotential (ORP),DissolvedOxygen(DO)andotherwaterqualityparameters.
Eutechproductsrangefromcompactpockettestersandportablemetersto research-gradebenchtopmetersand industrialprocesscontrollers.EachproductcarriesthesignatureEutechintuitivedesignandispackedwithadvanceduser-friendlyfeatures.
Asia Pacific (Head Office)|Eutech Instruments Pte LtdBlk55,AyerRajahCrescent,#04-16/24,Singapore139949Tel:(65)6778-6876Fax:(65)6773-0836www.eutechinst.com
North & South America|OAKTON InstrumentsP.O.Box5136,VernonHills,IL60061,USATel:tollfree1-888-4OAKTON(1-888-462-5866)Fax:(1)847-247-2984www.4oakton.com
Europe|Eutech Instruments Europe B.V.P.O.Box254,3860AGNijkerkNetherlandsWallerstraat125K,3862CNNijkerkNetherlandsTel:(31)033-2463887Fax:(31)033-2460832www.eutech.nl
Malaysia|Eutech Instruments Sdn BhdNo.1,LengkokKeluli2,BukitRajaPrimeIndustrialPark,41050BukitRaja,KlangSelangorD.E.,MalaysiaTel:(603)3342-8533Fax:(603)3342-6520www.eutechinst.com
China|Eutech China (A Division of Scientific Products (China) Pte Ltd)UnitD,20/FLonglifeMansion,No.1566YanAnWestRoad,Shanghai200052,ChinaTel:(86)021-5109-5800Fax(86)021-5258-2508www.eutech.cn
India|Eutech India (A Division of Scientific Products (India) Pvt Ltd)UnitNo.2013-2020,2ndFloor,OberoiGardenEstate,AWing,ChandivaliFarmsRoad,Chandivali,Sakinaka,Andheri(E),Mumbai400072,IndiaTel:(91)2267162200Fax:(91)2267162244
GlobalOffices
-
C o n t e n t s1.0 IntroductiontopHMeasurement >>041.1 BasicTheoryandApplicationofpHMeasurement1.2 UseofElectrodesforpHMeasurement1.3 Slope1.4 InfluenceofTemperatureonpHMeasurement
2.0 pHElectrodes >>052.1 SelectionCriteria2.2 Electrodes-SelectionGuide
3.0 pHElectrodesforPreciseMeasurement >>103.1 OpenPorepHElectrodes3.2 SpecialtypHElectrodes
4.0 pHElectrodesforRoutineMeasurement >>154.1 GeneralPurposepHElectrodes4.2 SpecialtypHElectrodes4.3 OtherSpecialtypHElectrodes
5.0 OtherElectrodes >>205.1 ORPElectrodes5.2 IonSelectiveElectrodes(ISE)5.3 ISEGeneralApplicationGuide
6.0 Accessories >>24
7.0 MaintenanceandTechnicalTips >>257.1 MeasurementSystemandCalibration7.2 TestingofpHMeterandElectrode7.3 UseandCareofElectrodes7.4 RejuvenationandReconditioningofElectrodes
page|03
-
1.1 BasicTheoryandApplicationofpHMeasurementpHreferstothepowerorexponentofhydrogenwherepstandsforpowerandHisthesymboloftheelementHydrogen.
pH is defined as the negative logarithm of the molar concentration of the active hydrogen ions, pH = -log H+ .
pHprovidesaconvenientwaytocomparetherelativeacidityoralkalinityofasampleatagiventemperature.Forexample,purewaterhasaneutralpHof7,wheretheactivitiesofhydrogenandhydroxideionsareequal.Iftheactivityofhydrogenionisgreaterthanthatofhydroxideionthesampleisdescribedasacidic.Ingeneral,asthelevelofhydrogenionactivityincreases,thepHdecreases.ApHbelow7isknownasacidic.Onthecontrary,asthelevelofhydrogenionactivitydecreases,thepHincreases.ApHabove7isknownasalkalineorbasic.
1.2 UseofElectrodesforpHMeasurementpHmeasurementisusuallydonewiththeuseofacombinationelectrode.Thecombinationelectrodeisanelectrodesystemformedbyaglasssensinghalf-cellandaninternalreferencehalf-cell.Asthereferencejunctionactsasthemediumofconductorbetweenthereferenceelectrolyteandthesampletobemeasured,itmustallowfreemovementofelectronsthroughthejunctionandintothesample.ApotentialdevelopsonthemembranesurfacewhenapHelectrodecomesintocontactwithasampleanditsvaluevarieswiththepHofthesample.ThisvariationinpotentialismeasuredinmVbyameterandisconvertedtodirectpHvalues.
1.3 SlopeTheslopeisthevoltageproducedperpH.Intheory,thevalueis59.16mVperpHat25C.Practically,thevaluerangesbetween50and58mV.
1.4 InfluenceofTemperatureonpHMeasurement
TemperaturevariationscanaffectpH.HoweveratacertainpH,usually7,temperaturewillnothaveaneffectonthepotentialofthesystem.Thisisknownastheisopotentialpoint.
Ifautomaticcompensationisnotpractical,thefollowingequationcanbeusedtodetermineerror:Magnitudeoferror=0.003pH/C/pHunitfrompH7
Note:Thetemperaturecompensationherereferstoelectroderelatedtemperaturevariationandnotsolutionrelatedvariations.
page|04
1.0
Introduction to pH Measurement
-
2.1 SelectionCriteriaEutechcombinationelectrodesoffertheconvenienceofhavingthereferenceandmeasuringelectrodescombinedinasinglehousing.Theyareofferedinavarietyofconfigurationstosuitmostlaboratoryandfieldapplicationneeds.
page|05
2.0
pH Electrodes
Electrode Construction
Single Vs Double Junction
Internal Reference Types|CalomelReference(Hg/Hg2Cl2)|Calomelreferenceelectrodescangivepotentialsaccuratetowithin0.01millivolt.TherepeatabilityandpotentialstabilityofsuchelectrodesaresuperiortothoseoftheAg/AgClelectrode,althoughonlyataconstantandrelativelylowtemperature.Calomelissubjecttoaconstantandrelativelylowtemperaturefluctuationwithatemperaturelimitationof80C.Calomelisrecommendedforclinicalmeasurement;forsamplescontainingprotein,trisbuffers;andforhighpuritywaterapplications.
|Silver/SilverChlorideReference(Ag/AgCl)|Ag/AgCl referenceelectrodesare largelyhysteresis-freeandcanbeusedatahigher temperaturewith lowertemperaturecoefficients.Ag/AgClisthebestgeneralpurposereferencewithawidetemperaturerange(-5to110C).
|DoubleJunction|AdoublejunctionreferenceisconstructedwithanAg/AgClinnerchamberandachemicallycompatiblereferencesolutionintheouterchamber.Itisrecommendedforsamplescontainingorganiccompounds,proteins,heavymetals;andothercompoundsthatinteractwithsilver,suchasbromides,iodides,cyanidesandsulfides.
Glass Body
Glasswithstandshightemperatureof100Cormore.
Resistanttocorrosivematerialsandsolvents.
Brittle.
Idealforlaboratoryuseandiseasytoclean.
Plastic Body
Notrecommendedforusageattemperatureabove80C.
Moderateresistancetohighlycorrosivematerialsandsolvents.
Durableandwithstandsroughhandling.
Idealforfielduse.
Single Junction
Idealforgeneralpurposeapplications.
Ag+ionsareincontactwithjunctionandthiscancausechemicalinteractionwithsulphur.Notsuitableforbiologicalsamplesortrisbuffers.
Double Junction
Preventsinterferencebetweentheinnerfillsolutionandsample.
ElectrolyteisfreeofAg+ions.Suitableforusewithbiologicalsamples.Canbeusedinplaceofcalomelreferenceelectrodes.
-
Refillable Vs Sealed Design
Reference Construction|RefillableReferenceCell|Selectedforhighaccuracy,stability,andlongerelectrodelife.Refillabletypessacrificeconvenienceandeaseofmaintenance.
PatentedTwist-CapDesignUnlikeconventionaldesignswhichuserubbersleeves,Eutechs620seriesrefillableelectrodesfeatureapatentedrefill-holewithtwist-capdesigneasy-to-useandleak-proof.Refillingofreferenceelectrolyteishassle-freeandquickwithnowastage.
|SealedReferenceCell|Sealedgel-filedreferenceelectrodesaredesignedforconveniencewhereminimalmaintenance is required.Slightly loweraccuracyandshorterlifemustbetakenintoaccount.
Twist-openthecaptoexposetherefillinghole.
Pourinreferenceelectrolytewiththerefillingbottle(thatissuppliedwithallelectrodes)
Twist-closethecap.
page|06
Refillable Design
Refillholeallowsreferenceelectrolytereplenishment.
Canbeusedmanytimesover.
Needsrefillingwhenfillsolutionislow.
Sealed Design
Norefillhole.Thereferenceelectrolyteisusuallyagel.
Replacementoftheelectrodeisnecessarywhenitgetscontaminated.
Virtuallynomaintenanceisrequired.
-
Types of Reference Junctions
Reference JunctionsSomeglasscombinationelectrodesfeatureananti-foulingannularceramicjunction.Theannularjunctionisformulatedwithaspecialceramicwhichencirclestheglassbulb.NumerousporesintheceramicprovidelowerresistanceandmorestablepHreadings.TheplasticbodycombinationelectrodescomestandardwithaporousHDPEpinjunction.Sleevejunctionprovidesthehighestflowratefordifficultsamples.
General Purpose Vs Specialty ApplicationsMostelectrodescomeindifferentstemlengthsanddiametersforspecificapplications.
page|07
Open pore Junction
About200timeslargerthanceramicjunctions,ensuresincreasedelectrolyteflowforstablejunctionpotential.
Annular Junction
Fastelectroderesponse.
Porous HDPE Junction
Lowelectrolyteflow,hencemoredurable.
Flushable Junction
Cleansesbypumpingoutelectrolytetoremoveresidue,thuseliminatescloggingproblemsinviscoussamples.
General Purpose Applications
Usuallymeasures120mm(length)by12mm(diameter)andcanbeusedforgeneralapplications.
Specialty Applications
Effectiveforspecificapplications.ForinstancethespeartipsensorcanbeusedforthedirectpHtestingofsemi-solidsandsoftmaterials.Sleevetypeelectrodeensureshighelectrolyteflowsoitisidealforlowionicstrengthandviscoussamplemeasurements.Ontheotherhand,aflatsurfacetipelectrodeisusedforflatsampleslikepaperorcloth.Micro-stemelectrodefitsintothinstemNMRtubesorsmallvessels.Forharshuse,adurabletoughbulbelectrodethatisresistanttobreakageisrecommended.
-
2.2 Electrodes-SelectionGuideGlass Body Combination pH Electrodes
page|08
Code No.
Glass Type
Application Code
pH Range
TemperatureRange (C)
Length x Dia. (mm)
Internal Reference Element
ECFG73504 X-2 A,F 0-13 0to100 110x12 Ag/AgClRefillable
ECFG73905 X-2 B,C,G 0-13 -5to80 110x12 CalomelRefillable
ECFG73792 X-2 H,O 0-13 0to110 110x12Ag/AgClDoubleJunctionSealed
ECFG73593 X-2 H 0-13 0to100 110x12 Ag/AgClSealed
ECFG73701 X-2 E,O 0-13 0to100 110x12Ag/AgClDouble JunctionRefillable
ECFG74519 X-3 H,T 0-14 5to110 110x12 Ag/AgClSealed
ECFG63506 X-2 A,D 0-13 0to100 55x8 Ag/AgClRefillable
ECFG43902 X-2 B,C,M 0-13 -5to80 180x4 CalomelRefillable
ECFG43904 X-2 B,C,M 0-13 -5to80 55x4 CalomelRefillable
ECFG73521 X-2 Q 0-13 0to100 110x12 Ag/AgClRefillable
ECFG63511 X-2 J 0-13 0to100 25x8 Ag/AgClSealed
ECFG53912 X-2 B,J 0-13 -5to80 25x6 CalomelRefillable
ECFG52910 X-1 B,S 0-12 -5to80 55x6 CalomelRefillable
ECFG72520 X-1 I 0-12 0to100 110x12 Ag/AgClRefillable
ECFG73711 X-2 D,O 0-13 0to100 110x12Ag/AgClDouble JunctionRefillable
ECFG73511 X-2 D 0-13 0to100 110x12 Ag/AgClRefillable
ECFG72710LI X-2 E 0-13 0to100 110x12LiClDouble JunctionRefillable
EC620130 X-2A,B,C,G,L,O,Q,R
0-14 0to80 160x12Ag/AgClDouble JunctionRefillable
EC620131 X-2A,B,C,D,L,O,Q,R
0-14 0to80 130x12Ag/AgClDoubleJunctionSealed
EC620133 X-2 A,B,I,O,Q 2-14 0to50 25x6Ag/AgClDouble JunctionSealed
EC620185 X-2 A,B,K,L,O 0-14 -5to100 102x10Ag/AgClDouble JunctionRefillable
EC620181 X-2 A,K 0-14 0to80 102x10 Ag/AgClRefillable
EC620183 X-2 A,B,K 0-14 0to80 102x10Ag/AgClDouble JunctionRefillable
EC620286 X-2 A,B,G 0-14 -5to80 106x10 CalomelRefillable
EC620293 X-2 B,N,P 0-14 -5to80 150x6 CalomelRefillable
EC620095 X-2 B,N,P 0-14 0to80 254x3 CalomelRefillable
EC620096 X-2 B,N,P 0-14 0to80 127x3 CalomelRefillable
EC620297 X-2 B,N,P 0-14 -5to100 165x5 Ag/AgClRefillable
Membrane Glass Types X-1 isespeciallysuitedfor lowtemperature,nonaqueoussolutionsand pHmeasurementsunderpH12.
X-2 isbestsuitedformostpHmeasurementswhereminimalornoNa+is present.Itisalow-resistantglasswithaveryfastandstableresponse and isdesignedforpHrangesof0to13andtemperaturesof0C to135C.
X-3 is especially formulated for continuous, long-term use at high temperatures,particularlyinstrongalkalinesolutionsabovepH11.It experiencesnegligibleNa+ionerrorabove13pH.Theimpedanceofthe glassismuchhigherthanotherglasses,andaslowerresponsewillbe experiencedatroomtemperatureandbelow.Responsetimeincreases asthetemperatureiselevated.
-
* All electrodes are supplied with standard cable length of 1m and with BNC connectors. Refer to our price list for electrodes with longer cable length.
page|09
Plastic Body Combination pH Electrodes
Code No.
Glass Type
Application Code
pH Range
TemperatureRange (C)
Length x Dia. (mm)
Internal Reference Element
ECFE74526 X-3 T 0-14 -5to80 115x12 Ag/AgClSealed
ECFE72511 X-1 I 0-12 0to100 115x12 Ag/AgClSealed
ECFE53901 X-2 B,N,P 0-13 -5to80 155x6 CalomelSealed
ECFC72521 X-1 A,L,R 1-13 0to80 110x12 Ag/AgClSealed
ECFC72521R X-1 A,L,R 1-13 0to80 110x12 Ag/AgClRefillable
ECFC72522 X-1 A,L,O,R 1-13 0to80 110x12Ag/AgClDoubleJunctionSealed
ECFC72522R X-1 A,L,O,R 1-13 0to80 110x12AgAgClDoubleJunctionRefillable
EC620132 X-2 A,B,G,L,O,Q 0-14 0to60 120x12Ag/AgClDoubleJunctionSealed
EC620109 X-2 B,D,G,L,Q 0-14 0to100 175x12Ag/AgClDoubleJunctionRefillable
EC620116 X-2 A,B,D,G,L,Q 0-14 0to100 175x12Ag/AgClDoubleJunctionRefillable
EC620300 X-2 A,B,L 0-14 -5to80 106x10 CalomelRefillable
Plastic Body Combination ORP Electrodes
Code No.
Sensor Type
Application Code
TemperatureRange (C)
Length x Dia. (mm)
Internal Reference Element
ECFC79602 PlatinumBand U,V 0to80 110x12 Ag/AgClSealed
ECFE77689 Antimony Y 0to80 110x12 Ag/AgClSealed
ECFE78602 GoldDisc W 0to80 110x12 Ag/AgClSealed
ECFC79601 PlatinumPin U 0to80 110x12 Ag/AgClSealed
ECFC79601R PlatinumPin U 0to80 110x12 Ag/AgClRefillable
ECFC79602 PlatinumPin U,X 0to80 110x12Ag/AgClDoubleJunctionSealed
ECFE79602R PlatinumPin U,X 0to80 110x12Ag/AgClDoubleJunctionRefillable
A Generalpurpose,aqueouspHmeasurements.Qualitycontrol, generallaboratoryandaquariumwater.B Trisbuffers,clinical,andbiologicalmediacontainingproteins, creams,fatsandcosmetics.C Researchmeasurements,fruitjuices,beer,milkandyogurt.D Highviscositysolutionssuchasemulsions,suspensions, paintsandvarnisheswherefrequentcleaningofthereference isnecessary.E Nonaqueoussolutions.Mustbeusedwithspecialreference electrolyteECRE015.F Lowtemperaturemeasurements.G Lowionicstrengthsolutions,suchashighpuritywater.H Hightemperaturemeasurements.I Surfacemeasurementssuchaspaper,skin,textile,leatherand agarplates.J Solidorsemi-solidsamplessuchascheese,meats,fruits,bread, orothersimilarsample.K Ruggeduse;ruggedizedelectrodetip.Aqueousmedia ingeneral.
L PortablepHmeter;fieldandschooluse.M Microsample,suchassemi-microcuvettesandNMRtube.N Testtubemeasurements.O Referencecontaminationproblemswhichrequireadouble junctionreference,suchasmediacontainingsulfides, bromides,iodides,andcyanides.P Measurementsinlong,narrowvessels.Q SoilpHmeasurements.R Swimmingpool,pHcontrolundercontinuousflowconditions.S Isoelectricfocusinggelsandothersurfacemeasurementsthat requireasmalldiameterflattip.T Photographicchemical;highpHsample(12to14pH).U ORPmeasurementsforgeneralpurpose.V SwimmingpoolORPmeasurement.W ORPmeasurementforcyanideuse.X ORPmeasurementrequiringadoublejunctionreference.Y Hydrofluoricacidandabrasivesolutionmeasurements.Z Potentiometricmeasurementsofchloridesandotherhalides.
Application Codes & Descriptions
-
Unique Fluid-Gel Electrolyte and Open-Pore Junction DesignProvidesafasterflowrateandimprovedcontactforquick,stableandhighlyaccuratereadings.
Refillable Double Liquid JunctionSuitableforhighionconcentrationsamples;alsoperformswellinlowionconcentrationandpartlyaqueoussamples.
3.1 OpenPorepHElectrodesCateringtothediscerninglaboratoryprofessional,thisseriesofopen-poreelectrodesmakesuseofsingleporecapillaryreferencejunctions,whichareabout200timeslargerthantypicalceramicjunctions.Asaresult,theelectrodesarealmostimpossibletoclog,evenindifficultsamples.Ifusedincombinationwithspeciallyformulatedelectrolyte,theflowrateintotheporeisfasterandleadstobettercontactbetweenthereferenceelectrodeandsample.This,inturn,generatesashorterresponsetimeandmoreaccuratemeasurements.
Solid Polymer-Gel ElectrolyteBesides being pressure resistant andmaintenance-free, thepolymergelprovidesamorestablematrixascomparedtoothergelled electrode reference systems.This enhances the abilityof theelectrode toproduce reliable results indirty, ion-weakorproteinsamples;lowpHsamples;andinthepresenceoforganicsolvents.Theruggedspeartipelectrodeisonethatusespolymergelelectrolytetoprovidereliableperformanceneededfordifficultsamplesandisidealforsoftfoods.
page|10
3.0
pH Electrodes for Precise Measurement
-
EC62
0130
EC62
0132
EC62
0131
EC62
0133
page|11
Model EC620131MeasuringpHRange 0to14pH
TemperatureRange 0to80C
ShaftMaterial Glass
LiquidJunctionType OpenPore
ReferenceJunction DoubleJunction
ReferenceType PolymerSealed
ShapeofMembrane Cylindrical
ShaftLength 130mm
Diameter 12mm
Model EC620132MeasuringpHRange 0to14pH
TemperatureRange 0to60C
ShaftMaterial Epoxy
LiquidJunctionType OpenPore
ReferenceJunction DoubleJunction
ReferenceType PolymerSealed
ShapeofMembrane Cylindrical
ShaftLength 120mm
Diameter 12mm
Model EC620133MeasuringpHRange 2to14pH
TemperatureRange 0to50C
ShaftMaterial Glass
LiquidJunctionType OpenPore
ReferenceJunction DoubleJunction
ReferenceType PolymerSealed
ShapeofMembrane SpearTip
ShaftLength 25mm
Diameter 6mm
Model EC620130MeasuringpHRange 0to14pH
TemperatureRange 0to80C
ShaftMaterial Glass
LiquidJunctionType OpenPore
ReferenceJunction DoubleJunction
ReferenceType Ag/AgClRefillable
ShapeofMembrane Cylindrical
ShaftLength 160mm
Diameter 12mm
-
0.2mmStandardBulbElectrode 1.0mmStandardBulbElectrode
3.2 SpecialtypHElectrodesRugged Bulb - Five Times Thicker than Regular BulbsThetoughtipelectrodefeaturesaruggedbulbthatis1.0mmthickascomparedto0.2mminastandardbulb.Yettheruggedbulbelectrodeisabletoproducefast,accurateandconsistentmeasurements.
Upto40timesmoredurablethanconventionalglasspHelectrodes,theruggedbulbelectrodedoesnotsacrificeresponsetimes.Itistheperfectanswerinapplicationswherefrequentbreakageofglassbulbelectrodesisaproblem,andwhereplasticbodyelectrodesarenotapracticaloption.Thisruggedtoughtipcombinationelectrodecanweathermuchpunishment-makingitanexcellentchoicefordemandingapplicationsintheplant,fieldandclassroom.Thisdouble-junctionelectrodecomeswithAg/AgClinternalelement,porousceramicouterjunctionandKClelectrolytethatdoesnotinterferewithtrisbuffers.
EC62
0183
page|12
Model EC620185MeasuringpHRange 0to14pH
TemperatureRange -5to100C
ShaftMaterial Glass
LiquidJunctionType Ceramic
ReferenceJunction DoubleJunction
ReferenceType Ag/AgClRefillable
ShapeofMembrane Cylindrical
ShaftLength 102mm
Diameter 10mm
Model EC620183MeasuringpHRange 0to14pH
TemperatureRange 0to80C
ShaftMaterial Glass
LiquidJunctionType Ceramic
ReferenceJunction DoubleJunction
ReferenceType Ag/AgClRefillable
ShapeofMembrane Cylindrical
ShaftLength 102mm
Diameter 10mm
-
EC62
0095
ong Thin StemLongthin-stemelectrodeswithdiameterupto8mmareidealforsmallsampletestinginNMRtubes,centrifuge,testtubesorsmallvessels.
EC62
0293
page|13
Model EC620096MeasuringpHRange 0to14pH
TemperatureRange 0to80C
ShaftMaterial Glass
LiquidJunctionType Annular
ReferenceJunction SingleJunction
ReferenceType CalomelRefillable
ShapeofMembrane Cylindrical
ShaftLength 38.1mm
Diameter 3mm
Model EC620293MeasuringpHRange 0to14pH
TemperatureRange -5to80C
ShaftMaterial Glass
LiquidJunctionType Annular
ReferenceJunction SingleJunction
ReferenceType CalomelRefillable
ShapeofMembrane Cylindrical
ShaftLength 150mm
Diameter 6mm
-
Flushable JunctionTheflushableannularjunctionallowsinstantaneousrefreshingofjunctionbypressingtheelectrodecap.Thisactioncleansclogseffortlessly.Thisversatileelectrodeisidealfortestingdirtywater,lowionicstrengthsolutionsandsolutionswithheavymetalsororganics.
EC62
0109
Model EC620116MeasuringpHRange 0to14pH
TemperatureRange 0to100C
ShaftMaterial Epoxy
LiquidJunctionType Flushable
ReferenceJunction DoubleJunction
ReferenceType Ag/AgClRefillable
ShapeofMembrane Cylindrical
ShaftLength 175mm
Diameter 12mm
Model EC620109MeasuringpHRange 0to14pH
TemperatureRange 0to100C
ShaftMaterial Epoxy
LiquidJunctionType Flushable
ReferenceJunction DoubleJunction
ReferenceType Ag/AgClRefillable
ShapeofMembrane Cylindrical
ShaftLength 175mm
Diameter 12mm
page|14
-
ECFC
7252
1
4.1 GeneralPurposepHElectrodesPlastic Body Combination Electrodes Eutechsplasticbodycombinationelectrodesaresuitableforawiderangeofgeneralpurposelaboratoryandfieldapplications.Theelectrodehousingismadeofspecialtyengineeringplasticthathashighimpactresistanceandwithstandstherigoursofruggeduseupto3barpressureandtemperaturesupto80C.
Choosefromtwomodels:single-ordouble-junction,sealed(gel-filled)orrefillable.Standard-sizesealedmodelsarefilledwithpolymerisedreferenceelectrolyte.Theruggedplasticbodyimproveselectrodedurability.TheGlasspHbulbisrecessedforprotection.Userefillableelectrodes(withopenrefillhole)forfast,stableresponse.
ECFC
7252
2
Model ECFC72521 ECFC72521RMeasuringpHRange 1to13pH 1to13pH
TemperatureRange 0to80C 0to80C
ShaftMaterial Plastic Plastic
LiquidJunctionType PorousHDPEPin PorousHDPEPin
ReferenceJunction SingleJunction SingleJunction
ReferenceType Ag/AgClSealed Ag/AgClRefillable
ShapeofMembrane Sphere Sphere
ShaftLength 110mm 110mm
Diameter 12mm 12mm
Model ECFC72522 ECFC72522RMeasuringpHRange 1to13pH 1to13pH
TemperatureRange 0to80C 0to80C
ShaftMaterial Plastic Plastic
LiquidJunctionType PorousHDPEPin PorousHDPEPin
ReferenceJunction DoubleJunction DoubleJunction
ReferenceType Ag/AgClSealed Ag/AgClRefillable
ShapeofMembrane Sphere Sphere
ShaftLength 110mm 110mm
Diameter 12mm 12mm
page|15
4.0
pH Electrodes for Routine Measurement
-
ECFG
7350
4
ECFC
7352
9
Glass-Body Combination ElectrodesThis laboratory gradeglass body electrodehas arefillableAg/AgCl reference.The annular junctiondelivers fast, stable response and is ideal forgeneral purpose applications in laboratory andfieldenvironments.
Model ECFG73504MeasuringpHRange 0to13pH
TemperatureRange 0to100C
ShaftMaterial Glass
LiquidJunctionType Annular
ReferenceJunction SingleJunction
ReferenceType Ag/AgClRefillable
ShapeofMembrane Cylindrical
ShaftLength 110mm
Diameter 12mm
Note: Plastic body 3-in-1 pH/Temp combination electrode (ECFC7352901B for pH 5/6, Ion 6, pH 11/110, pH 510, Ion 510 and pH 2100/1100)(ECFC7352901W for pH 300/310, PC 300 and PC 510)(ECFC7352901J for pH 600/610/620)
Model ECFC7352901B ECFC7352901W ECFC7352901JMeasuringpHRange 0to13pH 0to13pH 0to13pH
TemperatureRange 0to80C 0to80C 0to80C
ShaftMaterial Plastic Plastic Plastic
LiquidJunctionType PorousHDPEPin PorousHDPEPin PorousHDPEPin
ReferenceJunction SingleJunction SingleJunction SingleJunction
ReferenceType Ag/AgCl Ag/AgCl Ag/AgCl
ConnectorType BNC&2.5mmPhonoBNC&6PinConnector
BNC&8PinConnector
ShapeofMembrane Cylindrical Cylindrical Cylindrical
ShaftLength 110mm 110mm 110mm
Diameter 12mm 12mm 12mm
page|16
-
ECFG
5390
1
ECFG
4390
4
ECFG
6350
6
Model ECFE53901MeasuringpHRange 0to13pH
TemperatureRange -5to80C
ShaftMaterial Epoxy
LiquidJunctionType Annular
ReferenceJunction SingleJunction
ReferenceType CalomelSealed
ShapeofMembrane Cylindrical
ShaftLength 155mm
Diameter 6mm
Model ECFG63506MeasuringpHRange 0to13pH
TemperatureRange 0to100C
ShaftMaterial Glass
LiquidJunctionType Annular
ReferenceJunction SingleJunction
ReferenceType Ag/AgClRefillable
ShapeofMembrane Sphere
ShaftLength 55mm
Diameter 8mm
Model ECFG43904MeasuringpHRange 0to13pH
TemperatureRange -5to80C
ShaftMaterial Glass
LiquidJunctionType Annular
ReferenceJunction SingleJunction
ReferenceType CalomelRefillable
ShapeofMembrane Cylindrical
ShaftLength 55mm
Diameter 4mm
page|17
4.2 SpecialtypHElectrodesLong Thin StemLongthin-stemelectrodesbelow8mmdiameterareavailableforsmallsampletestinginNMRtubes,centrifuge,testtubesorsmallvessels.
-
Organic Sample MeasurementThe calomel reference electrode is ideal forbiotechnologyapplicationswithorganics,proteins,trisbuffersormetals.Itcanwithstandsolutionsthatreactwithsilver.
Model ECFG73905MeasuringpHRange 0to13pH
TemperatureRange -5to80C
ShaftMaterial Glass
LiquidJunctionType Annular
ReferenceJunction SingleJunction
ReferenceType CalomelRefillable
ShapeofMembrane Sphere
ShaftLength 110mm
Diameter 12mm
Sleeve DesignThe sleevedesignprovideshighelectrolyteflow rate, suitable for improvedresponse time inemulsions, slurries, suspensionsand solutionsof low ionicstrength.Theuniquereferencedesignandfillsolutionminimizedriftandgiveexcellentperformanceathigh temperatures.The sleevecanbe loosenedorremovedforeasycleaning.
Model ECFG73711 ECFG73511MeasuringpHRange 0to13pH 0to13pH
TemperatureRange 0to100C -5to80C
ShaftMaterial Glass Glass
LiquidJunctionType Sleeve Sleeve
ReferenceJunction DoubleJunction SingleJunction
ReferenceType Ag/AgClRefillable CalomelRefillable
ShapeofMembrane Sphere Sphere
ShaftLength 110mm 110mm
Diameter 12mm 12mm
page|18
Spear Tip DesignThe rugged spear tipelectrode is ideal for testingsemi-solids and soft foods. Featuring an annularjunctionforfastresponse,thisrefillableelectrodehasanAg/AgClreference.Thesinglejunctionelectrodeissuitableforlabgels,plantmaterialsandothergeneralpurposeapplications.
Model ECFG53912MeasuringpHRange 0to13pH
TemperatureRange -5to80C
ShaftMaterial Glass
LiquidJunctionType Annular
ReferenceJunction SingleJunction
ReferenceType CalomelRefillable
ShapeofMembrane Spear
ShaftLength 25mm
Diameter 6mm
ECFG
7390
5
ECFG
5391
2
ECFG
7351
1
-
page|19
4.3 OtherSpecialtypHElectrodes
Model DescriptionMeasuring pH Range
Temperature Range (C)
Shaft Length
Shaft Diameter (mm)
EC620052GlassBody,Prefilled,CalomelReferenceHalfCellElectrodes(RequireSeparateIndicatingHalf-Cell)
0-14 -5to80 105 10
EC620095MicroProbeGlassBodyCombination,Micro-Tip,152.4mmStemLength,Ag/AgClReference
0-14 0to80 254 3
EC620181ToughRuggedBulbGlassBodyCombinationwithSingleJunction,Ag/AgClReference
0-14 0to100 102 10
EC620284GlassBody,UniversalGlasspHIndicatingHalfCell(RequiresSeparateReferenceHalfCell)
0-14 -5to110 102 10
EC620286GlassBodyCombination,SingleJunction,CalomelReference
0-14 -5to80 106 10
EC620297 MicroProbeGlassBodyCombination 0-14 -5to100 165 5
EC620300PlasticBodyLiquid-FilledCombination,CalomelReference
0-14 -5to80 106 10
ECFC7352901BPlasticBody3-in1pH/Temp(30Kohm)CombinationwithAg/AgClReference,Sealed
0-13 0to80 110 12
ECFE539010BEpoxyBodyCombinationwithCalomelReference,Sealed
0-13 -5to80 155 6
ECFE7251101BEpoxyBodyCombinationwithAg/AgClReference,Sealed
0-12 0to80 115 12
ECFE7352801BEpoxyBody3-in1pH/Temp(1Kohm)CombinationwithAg/AgClReference,Sealed
0-13 0to80 110 12
ECFE7452601BEpoxyBodyCombinationwithAg/AgClReference,Sealed
0-14 5to80 115 12
ECFE7768901BEpoxyBodyCombinationAntimonywithAg/AgClReference,Sealed
2-11 0to100 110 12
ECFG4390201BGlassBodyCombinationwithCalomelReference,Refillable
0-13 -5to80 180 4
ECFG72710LI01BGlassBodyCombinationwithDoubleJunction,Refillable
0-13 0to100 110 12
ECFG7352101BGlassBodyCombinationwithAg/AgClReference,Refillable
0-13 0to100 110 12
ECFG7359301BGlassBodyCombinationwithAg/AgClReference,Sealed
0-13 0to110 110 12
ECFG7370101BGlassBodyCombinationwithDoubleJunction,Refillable
0-13 0to100 110 12
ECFG7379201B GlassBodyCombinationwithDoubleJunction,Sealed 0-13 0to110 110 12
ECFG7451901BGlassBodyCombinationwithAg/AgClReference,Sealed
0-14 5to110 110 12
35815-00FlexiphetSolid-State(Non-glass)EpoxyBodypHElectrode,FlatTip,NonFlowGelwithPTFEDiaphragm
0-14 -5to105 105 10
35815-10FlexiphetSolid-State(Non-glass)EpoxyBodypHElectrode,ConeTip,NonFlowGelwithPTFEDiaphragm
0-14 -5to105 105 10
35815-12FlexiphetSolid-State(Non-Glass)EpoxyBodypHElectrode,ConeTip,RefillableFlowwithPTFEDiaphragm
0-14 -5to105 105 10
35815-15FlexiphetSolid-State(Non-Glass)EpoxyBodypHElectrode,PiercingSharpTip,NonFlowGelwithPTFEDiaphragm
0-14 -5to105 50 10
-
ECFC
7960
1
ECFC
7960
25.1 ORPElectrodesChoosesinglejunctionelectrodesforfield,cleanwater,andothergeneralpurposeapplicationsordoublejunctionelectrodesforsamplescontainingheavymetalsandorganics.Platinumsensorsaresuitableformostgeneraluses,whilegoldsensorsareidealforcyanide/chromateandozoneapplications.
Model ECFC79602RMeasuringORPRange -1000to1000mV
TemperatureRange 0to80C
ShaftMaterial Plastic
SensorType PlatinumPin
ReferenceJunction DoubleJunction
ReferenceType Ag/AgClRefillable
ShapeofMembrane Cylindrical
ShaftLength 115mm
Diameter 12mm
Model ECFC79602MeasuringORPRange -1000to1000mV
TemperatureRange 0to80C
ShaftMaterial Plastic
SensorType PlatinumPin
ReferenceJunction DoubleJunction
ReferenceType Ag/AgClSealed
ShapeofMembrane Cylindrical
ShaftLength 115mm
Diameter 12mm
Model ECFC79601 ECFC79601RMeasuringORPRange -1000to1000mV -1000to1000mV
TemperatureRange 0to80C 0to80C
ShaftMaterial Plastic Plastic
SensorType PlatinumPin PlatinumPin
ReferenceJunction SingleJunction SingleJunction
ReferenceType Ag/AgClSealed Ag/AgClRefillable
ShapeofMembrane Cylindrical Cylindrical
ShaftLength 115mm 115mm
Diameter 12mm 12mm
page|20
5.0
Other Electrodes
ECFC
7960
2R
-
Model ECFE79601MeasuringORPRange -1000to1000mV
TemperatureRange 0to80C
ShaftMaterial Epoxy
SensorType PlatinumBand
ReferenceJunction SingleJunction
ReferenceType Ag/AgClSealed
ShapeofMembrane Cylindrical
ShaftLength 115mm
Diameter 12mm
page|21
ECFE79
601
Model ECFG7960101BMeasuringORPRange -1000to1000mV
TemperatureRange 0to100C
ShaftMaterial Glass
SensorType PlatinumBand
ReferenceJunction SingleJunction
ReferenceType Ag/AgClRefillable
ShapeofMembrane Cylindrical
ShaftLength 110mm
Diameter 12mm
Model ECFG7986101BMeasuringORPRange -1000to1000mV
TemperatureRange 0to110C
ShaftMaterial Glass
SensorType PlatinumBand
ReferenceJunction DoubleJunction
ReferenceType PolymerSealed
ShapeofMembrane Cylindrical
ShaftLength 110mm
Diameter 12mm
ECFG
7986
101B
-
5.3 ISEGeneralApplicationGuide
page|22
ISE Applications Concentration RangeTemperature /pH Range
Interferences ElectrodeStandard 0.1M
Standard 100 ppm
Standard 1000 ppm
Ion Strength Adjuster
Ammonia NH3-HighPurityPowerStationWater,FishTanks,SeaWater,WasteWater,PlatingBaths,Air/StackGasesandBiologicalSamplesType: Gas Sensing
(17,000to0.001ppm)1.0to5x10-6M
0to50C/AbovepH11
VolatileAmines ECNH30101B ECSCSAA1BT ECSCSAA2BT ECSCSAA3BT ECISAAA1BT
Ammonium NH4 - BoilerFeedWater,NaturalWaterandFertilizersType: Polymer Membrane
(18,000to0.01ppm)1.0to5x10-6M
0to50C/pH4topH10
K+ ECNH40301B ECSCSAM1BT ECSCSAM2BT ECSCSAM3BT ECISAAM1BT
Bromide Br- - Water,Wine,Soil,PlantTissue,BloodandClinicalAnalysisType: Solid State
(79,000to0.4ppm)1.0to5x10-6M
0to50C/pH2topH14
S-2,1-,CN-,HighCl-andNH3Levels
ECBRO0301B ECSCSBR1BT ECSCSBR2BT - ECISABR1BT
Cadmium Cd+2- PlatingBathsType: Solid State
(11,200to0.01ppm)0.1to1x10-7M
0to80C/pH2topH12
Ag+,Hg+2,Cu+2,HighPB+2andFe+2Levels
ECCD0301B ECSCSCD1BT ECSCSCD2BT - ECISACD1BT
Calcium Ca+2 -WaterSofteningSystems,BoilerFeedWater,Drinking/MineralWater,ClinicalAnalysisandFoodApplicationsType: Polymer Membrane
(40,000to0.2ppm)1.0to5x10-6M
0to50C/pH3topH10
Pb+2,Hg+2,Cu+2,Ni+2,Fe+2,Mg+2,Zn+2,Ba+2,K+2,K+,Na+
ECCAL0201B ECSCSCA1BT ECSCSCA2BT ECSCSCA3BT ECISACA1BT
Carbon Dioxide CO2 and Carbonate CO3-2- SoftDrinks/CarbonatedBeverages,Wine,Beer,FermentationProcesses,BacterialCulturesType: Gas Sensing
(440to0.4ppm)1x10-2to1x10-4M
0to50C/pH4.8topH5.2
VolatileWeakAcids ECCO20101B ECSCSCO1BT ECSCSCO2BT ECSCSCO3BT ECISACO1BT
Chloride Cl-- River/TapWater,PlantTissue,Soils,BoilerFeedWater,ClinicalAnalysis,Sweat,Urine,Cement,PlatingBathsandFoodSamplesType: Solid State
(35,500to1.8ppm)1.0to5x10-5M
0to80C/pH2topH12
S-2,I-,CN-,Br-,OH-,NH3,S2O3-2 ECCLO0301B ECSCSCL1BT ECSCSCL2BT ECSCSCL3BT ECISACL1BT
Copper Cu+2- PlatingBathsandWaterType: Solid State
(6350to6.4x10-4ppm)0.1to1x10-8M
0to80C/pH2topH12
Ag+,Hg+2,HighCl-,Br-,Fe+2andCd+2Levels
ECCU0301B ECSCSCU1BT ECSCSCU2BT - ECISACU1BT
Cyanide CN-- PlatingBaths,WasteWaterandPlantTissueType: Solid State
(260to0.13ppm)5x10-6to10-2M
0to80C/pH11topH13
S-2,I-,Br-,Cl- ECCN0301B - - - -
Fluoride F-- Drinking/NaturalWater,WasteWater,Air/StackGases,Acids,SeaWaterMinerals,Soils,Food,BiologicalFluids,Toothpaste/MouthWash,Coal,CarbonatedBeveragesandBoneType: Solid State
0.02ppmtoSaturated(10-6toSaturated)
0to80C/pH5topH8
OH- ECFO0301B ECSCSFL1BT ECSCSFL2BT ECSCSFL3BT ECISAFL1BT
Iodide I-- Milk,Feeds,PlantsandPharmaceuticalsType: Solid State
(127,000to6x10-3ppm)5x10-8to1.0M
0to80C/pH0topH14
S-2,CN-,Br-,Cl-,NH3,S2O3-2 ECIO0301B ECSCSIO1BT ECSCSIO2BT - ECISAIO1BT
Lead Pb+2- PlatingBathsandOrganicCompoundsType: Solid State
(20,7000to0.2ppm)10-6to10-1M
0to80C/pH3topH8
Ag+2,Hg+2,Cu+2,HighCd+2andFe+2Levels
ECPB0301B ECSCSPB1BT ECSCSPB2BT - ECISAPB1BT
Nitrate NO3-- Surface/DrinkingWater,SewageEffluent,SoilExtracts,
Fertilizers,PlantTissue,Meat,Potatoes,Spinach,Beets,BabyFoodType: Polymer Membrane
(62,000to0.5ppm)7x10-6to1.0M
0to50C/pH2.5topH11
CIO4-,I-,CN-,BF4
- ECNO0301B ECSCSNT1BT ECSCSNT2BT ECSCSNT3BT ECISANT1BT
Potassium K+- WasteWater,River/TapWater,ClinicalAnalysis,Saliva,Serum,Fertilizers,SoilsandWinesType: Polymer Membrane
(39,000to0.04ppm)10-6to1.0M
0to50C/pH2topH12
Cs+,NH4+,Tl+,H+,Ag+,Li+,
Na+,Tris1+ECK0301B ECSCSKO1BT ECSCSKO2BT - ECISAKO1BT
Silver/Sulfide Ag+/S-2- SewageEffluent,Soils,Sediments,PlatingBathsandPhotographicFixingSolutionType: Solid State
(107,900to0.01ppm)10-7to1.0M(Ag+,S-2)
0to80C/pH2topH12
Hg+2 ECAGS0301B ECSCSSS1BT ECSCSSS2BT - ECISASS1BT
Sodium Na+- SteamCondensatesinPowerPlants,ClinicalAnalysis,Serum,Foods,Wine,Glass,SeaWater,SwimmingPools,FishFarmsandAquariumsType: Glass Bulb
(23,000to0.2ppm)10-6MtoSaturated
0to80C/pH5topH12
H+,K+,Li+,Ag+,NH4+,Rb+,
Cs+,Tl+ECNA0201B ECSCSLNA1BT ECSCSLNA2BT ECSCSLNA3BT ECISALNA1BT
5.2 IonSelectiveElectrodes(ISE)EutechoffersalargeselectionofIonSelectiveElectrodes(ISE)tosuitawidevarietyofapplications.Eachelectrodehasatypicalresponsetimeof20to30secondswhichvarieswithsolutionconcentration.Gassensingelectrodesalsoincludereplacementmembranes.Eutechoffersthreeelectrodetypes:Membrane/SolidState,GasSensing,orGlassbulb.
Choosefromsinglejunctionordoublejunctionelectrodes.Singlejunctionelectrodesareidealforcleanwaterapplications.Usedoublejunctionelectrodesfortestingdirtywaterandsolutionswithheavymetalsororganics.Allelectrodesarerefillableandinclude15mlofelectrolyte,fillingpipetteandinstructions.Solidstateelectrodesalsoincludepolishingstrips.
IonSe
lectiveElectrod
e
-
page|23
ISE Applications Concentration RangeTemperature /pH Range
Interferences ElectrodeStandard 0.1M
Standard 100 ppm
Standard 1000 ppm
Ion Strength Adjuster
Ammonia NH3-HighPurityPowerStationWater,FishTanks,SeaWater,WasteWater,PlatingBaths,Air/StackGasesandBiologicalSamplesType: Gas Sensing
(17,000to0.001ppm)1.0to5x10-6M
0to50C/AbovepH11
VolatileAmines ECNH30101B ECSCSAA1BT ECSCSAA2BT ECSCSAA3BT ECISAAA1BT
Ammonium NH4 - BoilerFeedWater,NaturalWaterandFertilizersType: Polymer Membrane
(18,000to0.01ppm)1.0to5x10-6M
0to50C/pH4topH10
K+ ECNH40301B ECSCSAM1BT ECSCSAM2BT ECSCSAM3BT ECISAAM1BT
Bromide Br- - Water,Wine,Soil,PlantTissue,BloodandClinicalAnalysisType: Solid State
(79,000to0.4ppm)1.0to5x10-6M
0to50C/pH2topH14
S-2,1-,CN-,HighCl-andNH3Levels
ECBRO0301B ECSCSBR1BT ECSCSBR2BT - ECISABR1BT
Cadmium Cd+2- PlatingBathsType: Solid State
(11,200to0.01ppm)0.1to1x10-7M
0to80C/pH2topH12
Ag+,Hg+2,Cu+2,HighPB+2andFe+2Levels
ECCD0301B ECSCSCD1BT ECSCSCD2BT - ECISACD1BT
Calcium Ca+2 -WaterSofteningSystems,BoilerFeedWater,Drinking/MineralWater,ClinicalAnalysisandFoodApplicationsType: Polymer Membrane
(40,000to0.2ppm)1.0to5x10-6M
0to50C/pH3topH10
Pb+2,Hg+2,Cu+2,Ni+2,Fe+2,Mg+2,Zn+2,Ba+2,K+2,K+,Na+
ECCAL0201B ECSCSCA1BT ECSCSCA2BT ECSCSCA3BT ECISACA1BT
Carbon Dioxide CO2 and Carbonate CO3-2- SoftDrinks/CarbonatedBeverages,Wine,Beer,FermentationProcesses,BacterialCulturesType: Gas Sensing
(440to0.4ppm)1x10-2to1x10-4M
0to50C/pH4.8topH5.2
VolatileWeakAcids ECCO20101B ECSCSCO1BT ECSCSCO2BT ECSCSCO3BT ECISACO1BT
Chloride Cl-- River/TapWater,PlantTissue,Soils,BoilerFeedWater,ClinicalAnalysis,Sweat,Urine,Cement,PlatingBathsandFoodSamplesType: Solid State
(35,500to1.8ppm)1.0to5x10-5M
0to80C/pH2topH12
S-2,I-,CN-,Br-,OH-,NH3,S2O3-2 ECCLO0301B ECSCSCL1BT ECSCSCL2BT ECSCSCL3BT ECISACL1BT
Copper Cu+2- PlatingBathsandWaterType: Solid State
(6350to6.4x10-4ppm)0.1to1x10-8M
0to80C/pH2topH12
Ag+,Hg+2,HighCl-,Br-,Fe+2andCd+2Levels
ECCU0301B ECSCSCU1BT ECSCSCU2BT - ECISACU1BT
Cyanide CN-- PlatingBaths,WasteWaterandPlantTissueType: Solid State
(260to0.13ppm)5x10-6to10-2M
0to80C/pH11topH13
S-2,I-,Br-,Cl- ECCN0301B - - - -
Fluoride F-- Drinking/NaturalWater,WasteWater,Air/StackGases,Acids,SeaWaterMinerals,Soils,Food,BiologicalFluids,Toothpaste/MouthWash,Coal,CarbonatedBeveragesandBoneType: Solid State
0.02ppmtoSaturated(10-6toSaturated)
0to80C/pH5topH8
OH- ECFO0301B ECSCSFL1BT ECSCSFL2BT ECSCSFL3BT ECISAFL1BT
Iodide I-- Milk,Feeds,PlantsandPharmaceuticalsType: Solid State
(127,000to6x10-3ppm)5x10-8to1.0M
0to80C/pH0topH14
S-2,CN-,Br-,Cl-,NH3,S2O3-2 ECIO0301B ECSCSIO1BT ECSCSIO2BT - ECISAIO1BT
Lead Pb+2- PlatingBathsandOrganicCompoundsType: Solid State
(20,7000to0.2ppm)10-6to10-1M
0to80C/pH3topH8
Ag+2,Hg+2,Cu+2,HighCd+2andFe+2Levels
ECPB0301B ECSCSPB1BT ECSCSPB2BT - ECISAPB1BT
Nitrate NO3-- Surface/DrinkingWater,SewageEffluent,SoilExtracts,
Fertilizers,PlantTissue,Meat,Potatoes,Spinach,Beets,BabyFoodType: Polymer Membrane
(62,000to0.5ppm)7x10-6to1.0M
0to50C/pH2.5topH11
CIO4-,I-,CN-,BF4
- ECNO0301B ECSCSNT1BT ECSCSNT2BT ECSCSNT3BT ECISANT1BT
Potassium K+- WasteWater,River/TapWater,ClinicalAnalysis,Saliva,Serum,Fertilizers,SoilsandWinesType: Polymer Membrane
(39,000to0.04ppm)10-6to1.0M
0to50C/pH2topH12
Cs+,NH4+,Tl+,H+,Ag+,Li+,
Na+,Tris1+ECK0301B ECSCSKO1BT ECSCSKO2BT - ECISAKO1BT
Silver/Sulfide Ag+/S-2- SewageEffluent,Soils,Sediments,PlatingBathsandPhotographicFixingSolutionType: Solid State
(107,900to0.01ppm)10-7to1.0M(Ag+,S-2)
0to80C/pH2topH12
Hg+2 ECAGS0301B ECSCSSS1BT ECSCSSS2BT - ECISASS1BT
Sodium Na+- SteamCondensatesinPowerPlants,ClinicalAnalysis,Serum,Foods,Wine,Glass,SeaWater,SwimmingPools,FishFarmsandAquariumsType: Glass Bulb
(23,000to0.2ppm)10-6MtoSaturated
0to80C/pH5topH12
H+,K+,Li+,Ag+,NH4+,Rb+,
Cs+,Tl+ECNA0201B ECSCSLNA1BT ECSCSLNA2BT ECSCSLNA3BT ECISALNA1BT
-
pH Buffer SolutionspHbuffersolutions,availablein480mland1lleak-proofbottles.BuffervaluesincludepH1.68,4.01,7.00,9.00,10.01and12.45.Colouredcodedbufferswithdispensertopsareavailableinselectedmodelsforinstantrecognition:pH4-red,pH7-yellowandpH10-blue.Theseareavailablein480mland1lbottles.CertificateofAnalysiscanbedownloadedfromourwebsitehttp://www.eutechinst.com.
pH Buffer SachetsSingleusebuffersachetsarevacuum-sealedandair-tightwith0.01pHaccuracyat25C.TheseNIST-traceablebuffersareshippedinaboxof20sachets.TheavailablevaluesarepH4,7,10anddeionisedwaterforrinsing.Simplyinserttheelectrodeintoabuffersachet,calibrate, rinseanddiscardusedsolutionsproperlywhendone.Nowastageandcontamination-free;convenientforlaboratoryandoutdooruse.
Reference Refilling ElectrolyteSeveral typesof referencefill solutionsareavailable: 4MKCl saturated (withAgCl) forAg/AgCl single junctionelectrodes;4M KCl saturated for Ag/AgCl double junction electrodes or 4M KCl for Calomel (Hg/Hg2Cl2) electrodes and otherspecialtyelectrodes.
Electrode Cleaning & Storage SolutionsRemoveproteinorgreaseandoildepositsfromelectrodeswithcleaningsolutionwhichcontainspepsin.Aftercleaningorwhentheelectrodeisnotinuse,alwayskeeppHelectrodesinsomestoragesolutiontoensureproperworkingcondition.
Flexible Electrode HolderTheelectrodeholderclaspsuptofourstandardelectrodes(14mmdia.max)andoneATCprobewithaswivelarmthatcanbe rotated360. It also allowsanypositioningof electrodes at a constant vertical angle - eithermoving side-to-sideorup-and-downforaddedconvenience.
page|24
6.0
Accessories FlexibleElectrodeHolderpHBufferSachetspHBufferSolutions
-
7.1 MeasurementSystemandCalibrationpH MeterThepHmeterfunctionsasaspecializedvoltmetercapableofaccuratelymeasuringsmallvoltagechangesatextremelyhighimpedanceofpHelectrodeandadjuststopHandvoltagecharacteristicsoftheelectrodesystem.
MostmodernpHmeters incorporateautomaticor/andmanual temperaturecompensation tocorrect for variation inpHvalueofagivensolutionwithsampletemperature.Newermicroprocessor-basedmetersareprogrammedtosolvetheNernstequation,takingintoaccountelectrodevoltage,efficiencyandtemperature.Mostmetersprovideautomaticbufferrecognitionforcalibration,errormessagesanddiagnosticcircuitrytosimplifyoperationandreduceoperatorerror.
Calibration BuffersThesestandardsolutionsofknownpHvalueareusedtoadjustthepHmeter/electrodesystemtodisplayprecisemeasurements.Buffersareavailableasready-to-usesolutions,insachetsandcapsules.AllbuffershavethespecialcharacteristicofresistingpHchangeupondilutionoracid/basecontaminationtoacertainextent.SomesolutionsarestandardizedagainstNIST-certifiedpHreferencesforcalibratingmeterswithresolutionupto0.001pH.
Electrode SystemTheelectrodesystemconsistsoftwohalfcells:apHindicatingelectrode,whichdevelopsapotentialdependentonthepHofasolution,andareferenceelectrodewhichprovidesaconstantpotentialandcompletestheelectricalcircuit.Nowadayscombinationelectrodes-bothhalfcellsjoinedcoaxially-arefrequentlyusedfortheconvenienceandcompactnesstheyoffer.
CalibrationTheelectrodemustbecalibratedregularlytoensureaccurate, repeatablemeasurementswithavarietyofcommercialpHcalibrationbuffersolutions.
Foroptimalaccuracy,calibrationorstandardizationshouldbeperformedwithfreshbufferofpHvalueclosetothatofthesampletobetested.WhenthesamplepHisunknown,atwo-pointcalibrationisperformed:firstwithpH7(closetotheelectrodeszero-potentialpoint),followedbyanacidorbasebufferwhosevaluebracketstheexpectedpHvalueofthesample.Althoughone-pointcalibrationsufficesforfairlyreliablemeasurement,three-pointorevenfive-pointcalibrationsyieldthemostaccurateresultsacrosstheentiremeasurementrange.MakesurethepHmetercatersforachoiceofpHcalibrationbufferset,namelytheUSA,NISTorDINreferencebufferstandards.
page|25
7.0
Maintenance and Technical Tips
pH Electrode Anatomy
1 Cable
2 Cap
3 FillHole
4 Body-GlassorEpoxy
5 OuterReference ChamberFilledwith InternalFillSolution
6 Ag/AgCIWire
7 AnnularReference JunctionAllows ReferenceSolution toLeak
8 InnerReference Chamber
9 OuterReference Chamber
10 pHSensingBulb
Double Junction
SingleJunction
-
page|26
7.2 TestingofpHMeterandElectrodepH Meter with mV (Millivolt) ReadoutAttachashortedBNCcaptothemetersBNCinputandchangethepHtomVmeasurementmode.ThemVreadingshouldreadabout0.0mV.Ifthemeasuredreadingexceeds0.2mV,themetershouldbeelectronicallycalibrated.
ElectrodeConnectpHelectrodetopH/mVmeterandtoggletomVmeasurementmode.ImmerseelectrodeandcalibrateusingafreshpH7bufferfirst,thenrinsewithdeionisedwater,followedbyeitherpH4orpH10calibration.Whendone,checktheslope/offsetdisplayofthemeterfordiagnosisofelectrodecharacteristicsAlternativelyifthemeterdoesnotofferslope/offsetdisplayfunction,determinethepercentageofelectrodesslope.Forexample,ifpH7yields-5.0mV,andatpH4themVreadingis165mV,thenetchangeis170mV.Dividethisvalueby177.5,andmultiplyitby100todeterminethe%ofelectrodesslope(i.e.95.7%).Fornewelectrodes,theirslopeshouldbebetween95%and102%.Iftheslopefallsbelow92%,cleantheelectrode.
7.3 UseandCareofElectrodesMaintenance and Storage of pH ElectrodesElectrodesaredelicatemeasuringinstrumentsthatrequirepropercareandmaintenancetoproduceaccurateandreliableresults,andtoprolongusefullife.
AlwayskeepthepHelectrodemoistwhennotinuseforaperiodoftime,byusinganelectrodestoragesolutionorapH7bufferasstoragemediatosoaktheelectrode.DONOTstoretheelectrodeindistilledordeionisedwaterasthiswillcauseionstoleachoutoftheglassbulbandreferenceelectrolyte,causingslowandsluggishresponse.
Electrodesmaybeshippedwitheitherprotectivecapsorinelectrodesoakingbottlestopreventcrackingorscratching,andtokeeptheglassbulbsmoist.Removetheelectrodegentlyfromthestoragebottleandrinseitwithdistilledwaterbeforeuse.Forlong-termstorage,alwayskeeptheelectrodeinthebottle,filledwithsufficientstoragesolutiontocoverthebulb.Replenishthebottleasneeded. HandlingTheelectrodeshouldberinsedthoroughlybetweensamplemeasurementsandcalibrationswithdistilledordeionisedwater.Blottheelectrodedrytogentlydislodgeexcesswater.Usea lint-freewipingpaperasrubbingcausestheelectrodetobechargedelectrostatically.Neverusepolymerorplasticbodyelectrodesinsamplescontainingorganicsolvents.
Refillable ElectrodesThefillingsolutioninrefillableelectrodesshouldbefilledupto,butnotpast,therefillhole.Makesurethattherefillholeisopenwhenmeasuringtoensurethatthefillsolutionflowsproperlythroughthereferencejunction.
7.4 RejuvenationandReconditioningofElectrodesAselectrodesage,theirefficiencyisreduced.Symptomsincludesluggishorerraticreadings.Thisagingisusuallycausedeitherbycontaminationoftheglassmembrane,orbyblockageoftheliquidjunctionreference.Belowareafewremedialprocedurestoimprovetheperformanceofsuchelectrodes.
Unblocking Reference JunctionAblockedorcloggedreferencejunctionattributestoabout80%ofallpHmeasurementdifficulties;resultinginextremelyslowresponse,off-scalereadingsandelectricallynoisymeasurements.Proceduresforunblockingthejunctiondependonthetypeofreferencejunctionelectrodeinuse:
Gel-Filled Electrodes Soaktheelectrodeinwarmwater(about60C)for5to10minutestore-establishcontact.Orplacetheelectrodeinwarm saturatedKClsolution(60C)andallowbothelectrodeandsolutiontocooldowntoroomtemperature.
Liquid-Filled Electrodes |SleeveandAnnularJunction| Draintheelectrode,rinsethecavitywithdistilledwaterandrefillitwithfreshelectrolyte.Forsleeve-typeelectrodes,rotatethe sleevetore-establishflowifnecessary.
Ceramic Junction |ForCalomelTypesOnly| Soaktheelectrodeinwarmwaterforabout10minutes,andcheckforelectrolyteflow.Alternatively,soaktheelectrodetipin concentratedHClfor5to10minutes(useadequateventilationandprecautionarymeasureswhenperformingthistask).Rinse theelectrode,thencheckforelectrolyteflowagain.
-
page|27
Order No. Stock Code ItemECBU1BT 01X211211 ColourlesspH1.68BufferSolution(480ml)ECBU4BT 01X211201 ColourlesspH4.01BufferSolution(480ml)ECBU7BT 01X211202 ColourlesspH7.00BufferSolution(480ml)ECBU9BT 01X211222 ColourlesspH9.00BufferSolution(480ml)ECBU10BT 01X211203 ColourlesspH10.01BufferSolution(480ml)ECBU12BT 01X211212 ColourlesspH12.45BufferSolution(480ml)ECBU4BTC 01X211204 RedColourCodedpH4.01BufferSolution(480ml)ECBU7BTC 01X211213 YellowColourCodedpH7.00BufferSolution(480ml)ECBU10BTC 01X211205 BlueColourCodedpH10.01BufferSolution(480ml)ECBU4BTC1LIT 01X211233 RedColourCodedpH4.01BufferSolution(1Litre)ECBU7BTC1LIT 01X211234 YellowColourCodedpH7.00BufferSolution(1Litre)ECBU10BTC1LIT 01X211235 BlueColourCodedpH10.01BufferSolution(1Litre)ECBU4BS 01X223102 NIST-TraceablepH4.01BufferSachets(Packof20Pcsx20ml)ECBU7BS 01X223101 NIST-TraceablepH7.00BufferSachets(Packof20Pcsx20ml)ECBU10BS 01X223103 NIST-TraceablepH10.01BufferSachets(Packof20Pcsx20ml)ECRINWT 01X223201 NIST-TraceableDeionisedRinseWaterSachets(Packof20Pcsx20ml)ECORPQUIN 01X062700 ORPQuinhydrone255mV(480ml)ECORPQUIN086 01X211215 ORPQuinhydrone86mV(480ml)ECORPPRE 01X081500 ORPPre-Treatment475mV(480ml)ECRE001 01X211208 RefillingElectrolyteforSingleJunctionAg/AgClElectrodes(480ml)ECRE002 01X211218 RefillingElectrolyteforDoubleJunctionAg/AgClElectrodes(480ml)ECRE005 01X211206 ElectrodeStorageSolution(480ml)ECRE006 01X370502 ElectrodeStorageSolutionForEutech620SeriesECDPCBT 01X211216 ProteinRemovalSolution(480ml)ECPHELSTDC 01X081600 FlexibleElectrodeHolderwithSwivelArm
Solutions
Ordering Information
|ForSilver/SilverChlorideTypesOnly| SoaktheelectrodeinwarmsaturatedKClsolution(60C)forabout10minutes,andcheckforelectrolyteflow.Alternatively, soaktheelectrodetipinconcentratedammoniumhydroxidefor5to10minutes(useadequateventilationandprecautionary measureswhenperformingthistask).Rinsetheelectrode,thencheckforelectrolyteflow.
|ForCeramicJunctionsOnly| If the junction remains clogged,gently sand the junctionarea (becarefulnot to touch theglassbulb), andcheck for electrolyteflow.
Cleaning Glass pH MembraneDirtyglassmembranesareusuallyindicatedbybeadsofwaterformingonthebulbwhenrinsingwithdistilledwater.Thebulbcanbecleanedasfollows:-
For Protein SoakinfreshproteinremovalsolutionECDPCBTfor30minutes,rinsethoroughlybeforeuse.
For Inorganic Deposits WashwithEDTA,ammoniaoracids
For Grease and Similar Films Washwithacetone,methanol,etc.
Reconditioning Glass pH MembraneProlongeduse,excessivealkaline immersion,orhightemperatureoperationwillcausesurface leachingofthemembraneglass;resultinginerraticorsluggishresponsewhichcannotberemediedbyclearingtheelectrode.Immersetheelectrodetipinto0.1NHClforlessthan5minutes,andrinsewithwater.Thenimmersetheelectrodetipinto0.1NKOHfor5minutes,andrinsethoroughlywithwater.Checkforelectrodesperformance.Iftheproblempersists,repeatthestepsbutnotethatfrequentHCl/KOHtreatmentcanshortentheelectrodelife.
We reserve the right to make changes, improvements and modifications to products shown.
-
ELE
08X2
3350
2 8/
06 R
ev 2
Distributedby:
Eutech Instrumentsmanufactures a comprehensive rangeof laboratory andfield instrumentation forwater analysis. Eutech Instruments alsoproduceson-lineprocessinstrumentsforwaterqualitymonitoringandcontrol.InnovativeproductsfromEutechinclude:
| World-Wide Sales and Service Support | Eutechprovidesworld-widesales and service support for all its products through its network ofinternational distributors. Contact us [email protected] fordetailsofyournearestdistributor.