A pH electrode is a glass or metal probe used to measure hydrogen ion activity. A combination electrode includes the reference element.
The glass electrode is attached to a pH meter to measure the pH of organic or mineral substances or solutions, or of biological or water samples.
The glass electrode has a very thin-walled tip and contains a saturated solution of potassium chloride. The membrane potential differs from that of the reference electrode, a function of the solution's pH. A combination electrode incorporates the reference element, often a silver wire covered with silver chloride. The wire constitutes a redox couple or half cell.
The glass electrode loses accuracy over time and must be recalibrated periodically using a buffered solution of known pH (pH 4, pH 7 or pH 10). It is also stored in a special solution when not in use. Some models require regular replenishment of the saturated solution. At high pH, other cations, especially sodium and lithium, can affect measurements (alkaline error). The electrode should never be left in a concentrated sodium solution.
Combination glass or metal electrodes are usually chosen for laboratory measurements. Other options include flat and penetration electrodes, and insertion or immersion models for field use. The nature of the material to be tested may require use of a double- or triple-junction electrode.
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PH / ORP electrode Orbisint CPS11D ENDRESS HAUSER
The Ceragel CPS71D is a digital pH electrode with Memosens technology, which is designed for process technology, hygienic and sterile applications. It is equipped with a double junction reference system, integrated bridge electrolyte and a built-in temperature sensor. Your benefits: Suitable for CIP / SIP cleaning...
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PH / ORP electrode OPTISENS PAS 1000 KROHNE
High Quality and Precise Glass Electrodes for Usage in Water Analysis (pH and ORP) High quality and precise glass electrodes of the OPTISENS PAS 1000 range...
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PH / ORP electrode 2724/2726 series Georg Fischer - Piping Systems
The Signet 2724-2726 pH and ORP Electrodes features a patented reference electrode design and uses the unique foul-proof patented DryLoc® connector. The large area PE reference junction and pathway is constructed to increase the total reference effectiveness and ensures long service...
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PH / ORP electrode ABB Measurement Products
Our broad range of sensing systems apply sensor technologies directed at specific application challenges. Flowing junction technology is used specifically for pure waters, whereas solid-polymer and solid-matrix sensors are used in aggressive process streams. High temperature measuring electrode are available for applications...
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PH / ORP electrode 0 - 14 | InRro4850i Mettler Toledo, Process Analytics AG
The InPro 4850i combination electrode for pH/ORP measurement in chlor-alkali processes, combines accurate measurement with durability. The electrode's sodium-sensitive glass membrane uses the sodium concentration of the chlor-alkali process brine as a reference. This reference...
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PH / ORP electrode Thermo Scientific - Environmental Monitoring and S
Orion ROSS Ultra® Premium pH Electrodes The best of the best! The fastest response, highest accuracy, and best reproducibility that you can get with a pH electrode plus a 2 year warranty. ROSS Ultra pH electrodes combine all the benefits of the ROSS line with an extended life expectancy and minimized long-term...
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For more than sixty years, Heito has been creating, designing and manufacturing sensors and probes for a large variety of electrochemical applications. Heito masters in its own workshops the production of pH sensitive glasses, the glassblowing process,...
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PH electrode DULCOTEST® series Prominent Dosiertechnik GmbH
PH Electrodes of our DULCOTEST® series offer a large range of pH electrodes for the solution of your pH value measuring problem. The production of our pH electrodes is subject to strictest quality controls and is automated in routine steps but effected manually and with professional control in critical steps. Thus,...
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Jenway supply a full range of pH electrodes for general purpose use and specific applications. Combination and three-in-one (with in-built temperature...
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PH electrode ECFG6350601B Eutech Instruments
Product Specification Description Parameter pH Range 0 to 13 pH Temperature Range 0 to 100 °C Liquid Junction Type Annular ceramic Internal...
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PH electrode IoLine SI Analytics GmbH
SCHOTT® Instruments IoLine – pH electrodes for the most demanding measuring tasks The new IoLine electrode family with iodine/iodide reference system from SCHOTT® Instruments has been developed to meet the most demanding laboratory measurement tasks. These electrodes are 100% metal ion free and hence ideally suited for measurements that are critical towards sample...
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PH electrode 3200HP pHaser™ Rosemount Analytical
Model 3200HP pHaser™ High Purity Water pH Sensor is designed for the accurate measurement of pH in low conductivity water. It is well suited to analysis of condensate, boiler water, and feedwater...
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PH / ORP electrode S10, S17 Series Electro-Chemical Devices ECD
All pH, ORP, DO, pION, Resistivity and Conductivity electrodes are available in either the S10 or S17 sensor style housings. The S10 and S17 sensors are field rebuildable and repairable....
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PH / ORP electrode Hamilton Bonaduz
Hamilton’s combination Redox (ORP) electrodes are universally...
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PH electrode max. 0.3 MPa | IS series IWAKI
Easy maintenance Electrode and cable are fitted with a one-touch detachable BNC connector for quick electrode replacement. Wide range...
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Reasonably priced sensor for water and wastewater treatment. Thanks to its ground-glass sleeve junction even applicable in heavily contaminated...
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The sension Gel-filled pH Electrode uses a silver/silver chloride reference element with a glass frit junction and a full-range pH glass that can be...
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Pick from combination, 3-in-1, reference, indicating, low-ionic strength, ion-selective, and ORP electrodes in a variety of lengths (from micro to...
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SenTix® F – a new pH electrode for mobile measurements In the lab, pH electrodes are mostly used at constant temperatures. This doesn’t apply for electrodes in the field measurement....
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PH electrode FermProbe® Broadley-James
Model F-615 - FermProbe with T-Pull, disconnect cap: - 0 - 13 pH range - Steam sterilizable to 135° C - 150 psig max. pressure - Double junction, Ag-AgCl reference system - Electrode secures to housing with threaded retainer nut Model F-635 - FermProbe with Pg13.5, disconnect cap: - 0 - 13 pH range - Steam sterilizable to 135°...
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PH electrode InLab® Routine series Mettler Toledo Analyticla Instruments
These InLab® electrodes are part of any classical lab equipment. They cover the majority of lab applications in aqueous media. The electrolyte...
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Each membrane of a pH electrode has its own composition, bulb configuration and thickness. Therefore, carefully study the specifications and suggestions in this section to select the most suitable electrode for your application. SP10B pH, epoxy, sealed, 0...13 pH, 0...80°C SP10T...
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PH / ORP electrode Martens Elektronik GmbH
Standard Combination pH- and ORP Electrodes Features pH and ORP combination electrodes are supplied with a protective cap. In this condition the electrodes can be stored max. 1 year. The shank of the combination electrode...
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Ph combined electrode Monokrystaly, s.r.o
The electrodes have glass membranes and incorporated external reference system. The connection of the glass membrane with coaxial cable...
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PH electrode Hanna Instruments
The Hanna HI1230B is a plastic bodied gel filled double junction combination pH electrode...
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PH / ORP electrode 9000 Series LTH Electronics
The 9000 series pH & Redox sensors are designed for direct installation into a pipe or in the wall of a tank for continuous...
