Getting To Know Your PH Electrode - Hanna Instruments

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odes are normally single junction As depictedConventionalelectrodes are normally single junction As depicted, these electrodes have only a single junction,by the figure below, these electrodes have only a single junction,Porous PTFE is a hydrophobicPorous PTFE is a hydrophobicthe reference electrode system in contact with which serves to put the reference electrode system in contact withmaterial that is available withmaterial that is available withadverse conditions, such as high pressure, highthe sample Under adverse conditions, such as high pressure, highdifferent porosities Because of itsdifferent porosities Because of itsy acidic or alkaline solutions etc , the positive flow temperature, highly acidic or alkaline solutions etc , the positive flowchemical advantages, PTFE is widelychemical advantages, PTFE is widelyhrough the junction is often reversed resulting in of the electrolyte through the junction is often reversed resulting inused in industrial applications used in industrial applications le solution into the reference compartment If thisthe ingress of sample solution into the reference compartment If thishe reference electrode can become contaminated,is left unchecked, the reference electrode can become contaminated,e electrode failure Another potential problemleadingto completeFiberWick electrode failure Another potential problemFiber Wickelectrodes is the clogging of the junction due to with single junction electrodes is the clogging of the junction due toThis type of junction is often used onThis type of junction is often used onAgCl is less soluble in the sample than the referenceAgCl precipitation AgCl is less soluble in the sample than the referenceplasticbodiedelectrodeswithgelledplastic bodied electrodes with gelled Therefore, when the electrolyte solution makes electrolyte solution Therefore, when the electrolyte solution makeselectrolytes The advantagethiselectrolytes The advantageof thisPTFE: Polytetrafluoroethylene(PTFE) hashydrophobic properties whichmple, some AgCl will precipitate on the external facecontactwith the sample,some AgClofwillprecipitate on the externalfaceit is resultrenewable;asreadingsthe clothobtained from the sensor junction is it is renewable; as the clothresult is drifty readings obtained from the sensor of thejunctionjunction isTheis driftyprovide one of the most chemically resistant junctions available. It is comlike material is pulled out from itslike material is pulled out from itsElectrodes feature either a singleor ectrodesfor processapplications.thejunctionis renewedposition,the junctionis renewedwithction system, as the name implies, has twoHanna’sdoublejunctionsystem,as thewithimplies, hasmonlytwo used in pHto putincontactof which is inelectrodescontact withservethe sampleasthe referencejunctions,only onesystemof whichis incontactwithwith the sampleBESTasanelectrodeuncontaminated,freshsurface an uncontaminated,freshFOR: Sampleswhere greasesor surface oils are present, or in biological solubelow Undertheadverseconditions,sameshownthe figure belowUnderunderadverseconditions, the samesample.Thesetheelectrodesareless inexpensive,however,adversetions containing large amounts of protein.e ingress is evident However, as the referencetendency of sample ingress is evident However, as the ure,orhighlyacidicorOpen JunctionOpen Junctionseparated physically from the intermediateelectrode system is separated physically from the intermediatePTFE Sleeve: A sleeve made of polytetrafluoroethylene (PTFE) materialalkalinethepositive flowofThisthetypeelectrolytethroughthejunctione contaminationof thesolutionselectrode isminimized electrolytearea,contaminationof theelectrode is minimized of thejunctionis often foundThis type of junction is often foundsurrounds an openinginto the reference cell. The hydrophobic propertiesogging of theisjunctionalso reducedwith in theThelikelihoodof cloggingtheisreferencejunctionin referencehalf-cellsfilled is also reduced within reference half-cells and is filledoften isreversedresultingingressof sampleintoofandtheectrode since the outer reference cella fthePTFEsleevefeaturea cloggingpreventionsystem (CPS).with a special gel which comes intowith a special gelwhich comesintocompartment. If this happens, the referenceelectrode can become conhat is “silver-free ” Since there is no silveruses directa fill solutionisthe“silver-free ”Sincecontactthatwithsolution tobe there is no silverdirect contactsolutionto be such as sauces, juices, andBEST FOR: Solutionswith a withhighthesolidscontenttaminated,leadingto electrode e formingto clogthe junction thereisAnnoprecipitateformingtoisolateclog the junction measured advantageofan openmeasured An advantage of an openGetting To Know Your pH ElectrodepHpH1. Single vs Double JunctionOuter CeramicJunctionCeramicJunctionrate than a ceramic typeJunctionand is oftenSilver-Freespecified for ISE measurements ElectrolyteOuter CeramicJunctionOther types of junctionsinclude:CeramicJunctionrate than a ceramic type and is oftenspecified for ISE measurements 3. Type of Sensing GlasselectrodesJunctionelectrodeswine.the reference electrode, so even if samplewere resistanceto happen, thejunctioningressis low contactjunction is low contact resistanceectrodes usecontaminationa fill solution suchthereferenceHI7071Singleelectrodesuse afill solutionand junctionlowiscloggingpotential and low clogging potential toastheelectrodeminimized.Alsotheouter fillsuch as the HI7071M KCl AgCl, while double junction electrodesthat contains 3.5M KCl AgCl, while double junction electrodesOpen: An open junction does not have a frit. The electrode uses an ree,whichreducestherisk082 that contains 3.5M KCl.typically use HI7082 that contains 3.5M KCl.hard gel as the Conejunction.This layer is silver free. The open junction has aCone StyleStyleof silver precipitation clogging the junction.highflowratemakingitidealfor semi-solids, emulsions, and other foodThis style junction is also renewable This style junction is also renewable ElectrolyteInner thejunctionof standardpH electrodes.As themoved, freshAs the sleeve or collar is moved,freshContainingHousingthesleeve or collar isContainingReference Wire MembraneReference WireSilverSilverfill solution cleans out thejunction withfill solutionemulsions,cleans out ementof food prodSensing Wirefresh electrolyte This hasa Ceramichigher flowfresh electrolyte This has a higher flowInner CeramicInneructs.OthertypesofbejunctionsThe body of a pHelectrodecanmade of various materials.include:General Purpose Glass (GP): Has the best response over the entire resistance of 100 megohmspHJunctionrange and is the most common glass formulaCapillary JunctionCapillaryle Junction Single Junction DoubleJunction SingleJunctiontionused.This type of junction can be made with smooth or frosted glass This type of junction can be made with smooth or frosted glass ctrodeElectrodeElectrodeElectrodeThe advantage of a capillary junction is a fast flow rateandFOR:an MostTheadvantage ofjunctionbetweenis a fast flowratetoandan 140ºFopen channel It is typically used with thickened electrolytes open channel It is typically used with thickened electrolytes to 60ºC).Single Junction: In a single junction electrode, the HI7071 fill solution thatunctions:of Junctions:is used contains 3.5M KCl AgCl.TypesLow-TemperatureGlass(LT): Has a resistance of 50 megohms, which isOpen PlatinumOpenPlatinumBEST FOR: Single junction electrodes are economical and ideal for generlowerthanGPglass.Asthetemperature of the LT glass decreases, theThis stylejunction is made by partially sealing fine Pt wires through This style junction is made by partially sealing fine Pt wires throughicPorousCeramical-purpose theTheseresistanceof thethe stem glass, creating a leakage path These have resistancehigh flow rates the stemcreatinga leakage path have highflowglassrates ectrodes withNormally used in electrodes withapproaches that of the GP glass.se ceramic withthe Junction: In a double junctionglass bodiesbecausethe containDoubleelectrode,theceramicsilver withchlorideBEST FOR: Measuringthe pH of refrigerated/chilled samples.oefficient is easilycorrectexpansion coefficient is easilyFiberglassFiberglassing solution is behind the inner junction. The chamber between the innerramic is availablewelded to glass Ceramic is k TheThisstylejunction is very similar to a fiber wick Theand outer junction is filled with HI70823.5MporositiesKCl fill solution.No AgCl isHigh-Temperature Glass (HT): Has a resistance of 200 megohms which issities and diameters with differentand diameters junction is typically renewable and may have a high flowjunction is typically renewable and may have a high flowo as a diaphragm It maybe referred to as a diaphragm present, so the fill solution is “silverfree”.higher than GPrateglass.As the temperatureof intheglass increases, therate depending on strand number in the bundle dependingon strand numbertheHTbundle BEST FOR: Use double junction electrodes with samples that contain sulfides or heavy metals to prevent contamination of the reference cell.resistance decreases. At high temperatures, the resistance of the glassapproaches that of the GP glass.www.hannainst.com BEST FOR: Measuring 2.75www.hannainst.comthe pH of samplesabove 95ºF (35ºC). It is important2. Types of Junctionsto note that using pH electrodes at high temperatures has a detrimentalThe junction is the electrical pathway between the sample and the internaleffect on the pH bulb, if not using HT glass.reference cell. The reference half-cell has a salt solution that diffusesHydrofluoric Glass (HF): Hydrofluoric acid can dissolve glass rapidly. Hannathrough the junction into the sample. Any clogging of the junction willuses HF resistant glass for aggressive applications that have fluorideresult in erratic and unstable readings. The junction type used with a pHions. Electrodes manufactured with this glass last ten times longer thanelectrode is one of the most important design considerations when selectelectrodes made with standard pH glass formulations (from 10 to 100ing the right electrode.days).The alkaline error is very high for this glass, so it is not suited for pHCeramic: A porous ceramic frit is one of the most common junctions used.measurements above pH 10.For glass body electrodes, the ceramic junction material is easily fusedBEST FOR: pH range from 2 to 10 pH and for samples with less than 2 g/Lwith glass and also has a similar expansion coefficient. Electrodes mayfluoride.contain a single, a double, or a triple ceramic junction.BEST FOR: Any aqueous solution. This is the most common junction foundin a standard laboratory.Clean Regularly Calibrate Often Condition AlwaysGetting To Know Your pH Electrodehannainst.com/pH 877-MY-HANNA sales@hannainst.com2.75

Getting To Know Your pH Electrode4. Tip Shape6. Refillable vs Non-RefillableThe glass bulb of a pH electrode is manufactured in different shapes.Each shape serves a unique purpose.All pH electrodes have a solution inside the reference cell. This solutionprovides the stable reference potential and the ions necessary to completethe electrical pathway through the junction and into the sample. The innersolution of pH electrodes can be refillable or non-refillable.Spherical: A spherical tip or rounded bulb is the most commonshape for a pH electrode. It provides a large surface area forthe sample to interact with.BEST FOR: The spherical bulb is ideal for aqueous samples andis considered general purpose.Conical: As the name implies this tip has a cone shape, makingtesting of semi-solids easy.BEST FOR: A conical tip bulb is ideal for direct penetration intosemi-solids, emulsions, and slurries such as jams, cheeses,yogurt, and meats.Flat Tip: The flat tip allows for the direct surface measurementof a sample.BEST FOR: The flat tip is ideal for measuring skin, leather, andpaper.5. Body MaterialpH electrodes are comprised of two half-cell electrodes; they are thereference half-cell and the pH indicating half-cell. When the two half-cellsare located within a single electrode body, it becomes known as acombination electrode. Whichever style you use, the composition of thebody material is an important consideration.Glass: It is resistant to many chemicals and transfers heat easily so thatthermal equilibrium is quickly reached between the solution in the electrode and the sample.BEST FOR: Laboratory testing, general use, and where fast response isrequired.PEI: Polyetherimide is a high-performance plastic that offers excellentresistance against aggressive chemicals. PEI offers durability and is one ofthe main probe types supplied with portable meters.BEST FOR: Environmental, educational, industrial, or anywhere that durability is required.PVDF: Polyvinylidene fluoride (PVDF) is a food grade plastic that stands upto most cleaning chemicals and solvents. It has high abrasion resistance,mechanical strength, and resistance to fungal growth. PVDF offersexcellent durability.BEST FOR: Semi-solids, emulsions and direct measurement of foodsamples.Refillable: A refillable pH electrode is one in which the reference fillsolution can be replenished or replaced as needed. Depending on the typeof outer junction, the rate at which the fill solution diffuses from the electrode ranges from 15 to 50 μL/hour. It is important to understand if youhave a single or double junction electrode so the correct fill solution can beused to maintain the proper level.BEST FOR: Lab use, education, or anywhere fast response and long life isrequired.Gel Filled: A gel filled electrode is also known as a maintenance free pHelectrode. Inside these electrodes is a viscous solution. The gel does notrequire any refilling, but over the lifetime of an electrode it does becomeexhausted. At this point, the electrode will have to be replaced.BEST FOR: Field, education, or where a rugged design is required.7. Type of Electrode ConnectorBNC: A BNC is a universal connector type. Any pH meter that has a BNCconnector can use any pH electrode regardless of manufacturer.BEST FOR: pH meters with BNC connectors.DIN: A DIN or multi-pin connector is proprietary (manufacturer specific)and can only be used with a compatible meter. The advantage of theDIN connector is that additional wires are used for a built-in temperaturesensor, amplifier, and/or a matching pin.BEST FOR: pH meters that are designed for specific electrode.Quick Connect DIN: Is a DIN Connector that allows for a quick,waterproof, and secure connection without having to tighten athreaded connection. This type of connector is proprietary to the meter.BEST FOR: pH meters that are designed for specific electrode.3.5 mm Digital: This style is a four pole connection used with digitalpH electrodes. They transfer measurement data digitally from the pHelectrode to the meter. This style is meter specific.BEST FOR: pH meters that are designed for specific electrode.Hanna has put together this guide to serve as a quickreference tool for best practices. Always remember toconsult the instruction manual or contact us for detailedinstructions for your specific needs.Stainless Steel: Made with AISI 316 stainless steel, this robust material canwithstand chloride concentrations that cause corrosion.BEST FOR: Industrial, environmental, or rugged applications.Clean Regularly Calibrate Often Condition AlwaysGetting To Know Your pH Electrodehannainst.com/pH 877-MY-HANNA sales@hannainst.com

Getting To Know Your pH Electrode Acids,Acids,StrongStrong Pressure (Bar) PressureAmplifier (Bar) AmplifierTemperature SensorOpenJunctionCeramicJunction SMARTRefillableCeramicJunctionCloth JunctionGRefillableKCl3 5M AgCl ElectrolyteClothJunctionDoubleReferenceGS AgCl ElectrolyteKCl 3 5M ElectrolyteDoubleReferenceSingle ReferenceApplicationApplicationGlass (G)Glass (G)PlasticPlastic(P) (P)Metal Metal(M) (M)KClElectrolyteGel 3 5MElectrolyteSingleReferenceBody MaterialSphericalSpherical(S) (S)(C)ConicalConical(C)Flat (F)Flat ip lectrolyteOpen JunctionTip ShapepH Electrode Reference pplicationApplicationGuidesGuides 2 20 10 12 87 2 870 1 0 12 101 2 3B/PHI1043B/PPagePageHI10430*HI10430*SGSG Alkaline,StrongStrongAlkaline,HI2111B(half-cell) HI5311HI2111B(half-cell) HI5311SP/GSP/G AquariumsAquariumsHI1332B/PHI1332B/PSPSP 0 10 12 93 2 93HI1043B/PHI1043B/PSGSG 0 10 12 87 2 87HI10430*HI10430*SGSG HI1131B/P/DHI1131B/P/DSGS G HI11310*HI11310*SGSG Beer BeerHI11311*HI11311*SGSG FC214DFC214DSMS M Biotechnology( 100( µl)100 µl)HI1083B/PBiotechnologyHI1083B/PSGS G BoilersBoilersand CoolingTowersHI72911Dand CoolingTowersHI72911DFMFM CMC M FC240BFC240BCMC M HI1332B/P/DHI1332B/P/DSPSP CheeseCheeseChemicalsChemicalsConductivity,Low LowConductivity,Conductivity,High s andCreamsFatsand CreamsFlasksFlasks PTFE PTFE PolymerPolymer HI1053B/PHI1053B/PCGCG CGCG HI1043B/PHI1043B/PSGSG SGSG FC210BFC210BCGCG 0 12 101 2 1010 10 12 88 2 88 0 1 0 12 101 2 101 0 1 0 12 101 2 101 3 3 2 96 2 960 10 12 87 2 87 3 32 100 2 100 0 1 0 12 97 2 97 FC220BFC220BSGS G FC911BFC911BSPSP HI2031BHI2031BCGC G FC200B/SFC200B/SCPC P FC240BFC240BCMC M FC201D,FC202DFC201D,FC202DCPC P 0 1 HI10430*HI10430* HI10530*HI10530*0 1 2 104,2 105 2 1050 1 2 104, 0 12 95 2 950 12 93 2 930 10 12 87 2 870 1 0 12 101 2 1010 10 12 87 2 870 1 0 12 101 2 1010 10 12 94 2 940 10 12 95 2 950 1 0 12 96 2 960 10 12 90 2 90 0 10 12 94 2 94 0 10 12 95 2 950 1 0 12 96 2 96 0 10 1 FC2100*FC2100*CGCG 0 1 0 12 102 2 102FC2020*FC2020*CPCP 0 1 0 12 102 2 HI1053B/PCGC G 0 10 12 87 2 872 104 2 104HI10530*HI10530*CGCG HI1612DHI1612DCGC G HI1413BHI1413BFGF G HI1414DHI1414DFGF G HI1053B/PHI1053B/PCGC G HI10530*HI10530*CGCG 0 1 0 12 101 2 101 0 1 0 12 92 2 920 10 12 98 2 98 0 1 0 12 88 2 88 0 10 12 87 2 870 1 0 12 101 2 101HI1331BHI1331BSGS G 0 10 12 89 2 89Fluoride,Sampleswith with HI1143BFluoride,SamplesHI1143BSGSG 0 10 12 88 2 88FC100BFC100BSPSP 0 10 12 94 2 94FC911BFC911BSPSP 0 1 0 12 96 2 96 0 1 0 12 96 2 960 10 12 94 2 94Food IndustryFood Industry(GeneralUse) Use)(GeneralFood, Food,Semi-solidSemi-solidelectrodeselectrodesDairy ProductsDairy ProductsFC242DFC242D pHpHBases,Bases,StrongStrong FC201D,FC202DFC201D,FC202DCPC P FC200B/DFC200B/DCPC P *edge specific*edge electrodespecific electrodeto choose?to choose?Give yourGivelocalyourHannalocal Hannaofficeofficea call fora callassistance.for assistance.Getting To Know Your pH ElectrodeCleanRegularly Calibrate Often 3 Alwayshannainst.com/pH 877-MY-HANNA sales@hannainst.com

Temperature SensorTemperature SensorKCl 3 5M AgCl ElectrolyteKCl 3 5M AgCl ElectrolyteKCl 3 5M ElectrolyteKCl 3 5M ElectrolyteViscolene ElectrolyteViscolene ElectrolyteCP FlasksFC230BHI1043B/PFC202DHI10430*FC220BHI2111B (half-cell) 30BFC201D, FC202DFC400BFC2100*FC232DFC2020*FC201D, FC202DFC260B 01D, FC202DHI10530*FC2100*HI1331B0 12 950 12 872 960 10 12 1012 950 10 1 2 104, 2 1052 960 10 12 930 12 950 12 870 12 940 12 1010 12 960 12 880 12 950 12 1012 870 10 12 1010 12 8832 960 12 960 12 870 12 8732 1000 12 1010 12 970 12 880 12 9522 890 12 9322 910 12 870 12 920 12 1010 12 930 12 870 12 1010 12 1010 12 1010 12 9422 1030 12 9522 1030 12 9622 910 12 902 980 10 12 940 12 880 12 950 12 950 12 960 12 950 12 1020 12 970 12 1022 960 12 1040 12 1020 12 870 12 940 12 1012 940 10 12 920 12 940 12 982 940 10 12 880 12 970 12 870 12 960 12 1012 1020 10 12 89Fluoride, Samples 93BFC201D, FC202DHI1043B/PFC200B/DApplicationFruitsAcids, rozen, SemiBases, StrongHam and SausagesBeerHorticulture and NurseriesHumidity, HighBiotechnology ( 100 µl)Boilers and Cooling TowersHydrocarbonsCheeseChemicalsConductivity, LowLaboratory (General Use)Conductivity, HighCreamsLeatherDairy ProductsMeatsEmulsionsMilk and YogurtFats and CreamsFood IndustryMonitoring,Continuous(General Use)NMR TubesFood, Semi-solidPaintsRecommended Electrodes*edge specific electrodeGetting To Know Your pH GGGPGGG S SSGP SCGP SCGP SMART PG GP S Polymer PTFE Pressure (Bar)Pressure (Bar)0 1AmplifierAmplifier Recommended ElectrodesSMART ApplicationRefillableRefillable Glass (G)Plastic (P)Metal (M)Gel ElectrolyteGel ElectrolytePFlat (F)Spherical (S)Conical (C)Flat (F)Open JunctionOpen JunctionCGlass (G)Ceramic JunctionCeramic JunctionSingle ReferenceSingle ReferenceFC200B/DSpherical (S)Conical (C)Plastic (P)AbbreviationGuideCloth JunctionCloth JunctionBody MaterialBody MaterialDouble ReferenceDouble ReferenceTip ShapeTip ShapeelectrodesAbbreviation Guide2Page2 94Page0 10 12 1022 8830 12 882 9420 12 922 96 0 10 12 872 960 10 12 872 94electrodes2.84pH ElectrodepHElectrodeApplicationReference GuidesGuide pH Electrode Application GuidespHpH2Getting To Know Your pH ElectrodeClean Regularly Calibrate Often Condition Always*edge specific electrodehannainst.com/pH 877-MY-HANNA sales@hannainst.comwww.hannainst.comUnsureabout which electrode to choose?Give your local Hanna office a call for assistance.Unsure about which electrodeto choose? Give your local Hanna office a call forassistance.www.hannainst.com2.83

Getting To Know YourpHpHElectrodeElectrode Application GuidesHI1230B/DPlating BathsHI62911DQuality ControlRecommended ElectrodesHI1413BHI1414DHI1230B/DHI62911DQuality 1BHI1043B/PHI10430*Semi-solid ProductsHI1053B/PHI10530*Semi-solid ProductsSkin, I1053B/PHI10530*HI1612DFC200B/DFC201D, FC202DHI2031BHI1413BFG SPFMSPSGSPSGSGCGCG CP G G FG CG CGCG GGFG FG CM SGSGSGSG P SM CM G SCCG M HI1048B/P/D, HI1048B/50SG PG G G G P P G FG FG CG CGCGC SPCGFFS G M GG G G M CM CGCMCGCGSCCS GM G Getting To Know Your pH ElectrodeUnsure about which electrode to choose? Give your local Hanna office a call for assistance. 0 10 1 0 10 1 0 1 0 10 1 0 10 1 0 1 0 10 1 0 1 2 0 10 1 0 10 1 3 0 10 10 1 3 30 1 30 1 0 1 0 10 1 0 1 0 10 1 3 0 10 1 0 1Pressure (Bar)AmplifierTemperature SensorSMARTPressure (Bar)RefillableAmplifierSMART KCl 3 5M AgCl ElectrolyteTemperature SensorKCl 3 5M ElectrolyteGel Electrolyte 0 1 0 1 Refillable Polymer Open JunctionKCl 3 5M ElectrolyteCeramic JunctionGel Electrolyte Wine and MustUnsure about whichelectrode to choose? Give your local Hannaa call forHI10480*S officeG assistance. *edge specific electrode Polymer G Page0 1 PTFE P GSS GG GS PTFEGSCBody MaterialGSGGSSSC CSCPSSGSSSM Page0 1 32 980 12 980 12 89 0 12 1000 12 93 0 12 950 12 96 0 12 87 0 12 1010 12 87 0 12 1010 12 920 12 94 0 12 96 0 12 900 12 980 12 9822 98 0 12 870 12 101 0 12 890 12 88 0 12 87 32 1010 12 980 12 88 0 12 990 12 880 12 870 12 101 32 90 32 900 12 90 32 990 12 990 12 101 0 12 99 32 87 0 12 100 0 12 99 32 99 0 12 962 982 982 892 1002 932 952 962 872 1012 872 1012 922 942 962 902 982 982 982 872 1012 892 882 872 1012 982 88electrodesCFCMC CFCPP CGGPCCCSSCSGSHI1297D*edge specific electrodeWater Treatment F electrodesHI1414D/50FC201D, FC202DSoil, DirectHI1292DHI2031BHI1053B/PHI1413BSkin, ScalpHI10530*HI1414D/50Soil SamplesHI1230B/DSoil, entsSoil SamplesHI10430*HI1230B/DHI1413BHI1292DSurface MeasurementsHI1414DHI1043B/PSolventsSwimming PoolsHI1297DHI10430*Titrations, Non AqueousHI1151HI1413BSurface MeasurementsHI1043B/PHI1414DHI10430*Swimming PoolsHI1297DTris BufferHI1144B/DTitrations, Non AqueousHI1151HI1343BHI1043B/PVials and Test TubesHI1330B/DHI10430*Tris 343BWater, High PurityHI1053B/PVials and Test TubesHI1330B/DWater, HI1297DHI10530*Water, PotableWater, High PurityHI1053B/PFC215DWater, MunicipalHI1297DWater TreatmentHI1297DHI1053B/PHI1048B/P/D, HI1048B/50Water, PotableWine and Must HI10530*HI10480*FC215DG pHPhotographic ChemicalsSaucesPlating BathsHI1332B/P/DFG2pHPhotographic ChemicalsApplicationPaperHI1414DFCloth JunctionViscolene ElectrolytePaperOpen JunctionHI1413BCloth JunctionRecommended ElectrodesTip ShapeApplicationSingle ReferenceGlass (G)Plastic (P)Metal (M)Body MaterialSpherical (S)Conical (C)Flat (F)Tip ShapeDouble ReferenceAbbreviation GuideDouble ReferenceGlass (G)Plastic (P)Metal (M)Single ReferenceCeramic JunctionSpherical (S)Conical (C)Flat (F)Viscolene ElectrolyteKCl 3 5M AgCl ElectrolyteAbbreviation GuidepH Electrode Application GuidespH ElectrodeReference Guide22 992 882 872 1012 902 902 902 992 992 1012 992 872 1002 992 992 962 102 www.hannainst.com 0 12 1022.85Clean Regularly Calibrate Often Condition Alwayshannainst.com/pH 877-MY-HANNA sales@hannainst.comwww.hannainst.com 2.85

HI3618DPtG HI36180*PtG Open JunctionCloth JunctionRecommended ElectrodesLaboratory (General Use)pHPressure (Bar) Amplifier Temperature SensorRefillableGKCl 3 5M ElectrolyteKCl 3 5M AgCl ElectrolyteApplicationGlass (G)Plastic (P)Gel ElectrolyteSingle ReferencePtPlatinum (Pt)Gold (Au)Ceramic JunctionBody MaterialHI3131B/PAbbreviation GuideDouble ReferenceSensorORP Electrode Reference GuideSMARTGettingTo KnowYourORP ElectrodeApplicationGuidespH Electrode2Page 0 12 91 0 12 91 0 12 103 HI36200*PtP 22 103OxidantsHI4430BAuP 22 93OzoneHI4430BAuP 22 93Quality ControlHI3230BPtP 22 93Titrations, ORPHI3131B/PPtG Water, MunicipalHI3230BPtP WineHI3148BPtG 0 12 9122 930 12 97*edge specific electrodeHalf-Cell and Reference Electrode Application GuidesPressure (Bar)KCl 3 5M ElectrolyteCeramic Junction Double ReferenceTip ShapeReferencepH Half CellPRecommended ElectrodesPageLaboratory (General Use)HI2111B HI2112B HI3133BStrong Alkaline SolutionsSuspended SolidsTitration, ArgentometricTitrations, GeneralS SP2 104GHI5311 GS GHI5414 GS GHI5312 GHI5313 P C HI5312 G www.hannainst.com PPt 3 32 1052 1052 105 0 12 106 0 12 1060 1 2 106 0 1 0 12 105 0 12 106 0 1GG2 1052 104GHI53110 1GGWide Temperature Range HI3133B0 12 104HI5311HI5313 2 104HI5412Titration, Potentiometric GHI5413HI5110B2 104 GHI5314 2 106PtGHI2111B0 12 104 GHI5412FC260BRemote Filling 2 1052 1062 104 0 12 105Unsure about which electrode to choose? Give your local Hanna office a call for assistance.Clean Regularly Calibrate Often Condition AlwaysGetting To Know Your pH Electrodehannainst.com/pH 877-MY-HANNA sales@hannainst.compH Measurement SOP 2.0 9/2018 PRINTED IN USAHI5313Milk2.86Single ReferenceApplicationGlass (G)Plastic (P)Body MaterialelectrodesSpherical (S)Cylindrical (C)Platinum (Pt)Gold (Au)ORP Half CellAbbreviation GuidePTFE Sleeve JunctionHalf-Cell and Reference Electrode Reference Guide

Fiber Wick This type of junction is often used on plastic bodied electrodes with gelled electrolytes The advantage of this junction is it is renewable; as the cloth like material is pulled out from its position, the junction is renewed with an uncontaminated, fresh s

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