pH & Ion Electrodes

pH & Ion Electrodes are critical tools in the measurement of acidity, alkalinity, and ion concentration in various solutions.

Various types of pH electrodes offer precise and quick readings, which are essential for a wide range of scientific applications, from environmental monitoring and medical diagnostics.

The diversity in electrode types caters to specific measurement needs, ensuring accurate results across different mediums. With advancements in electrode technology, these instruments provide reliable performance in challenging conditions, including extreme pH ranges and non-aqueous solutions.

Their ease of use, combined with the ability to deliver rapid and accurate measurements, makes pH and ion electrodes indispensable in laboratories and fieldwork, facilitating research and quality control processes.

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pH Electrodes

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  • General Purpose pH Combination (4136L21) AgCl internal reference sealed by ion exchange barrier pH range 0-14 at temperatures from 0° to 100°C Replaceable junction Plastic body 13 mm diameter x 138 mm long. 4136L16 and L21 have removable bulb connector for easy…

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    Thermo Scientific Orion

    Orion Triode 3-in-1 Probe is a practical solution for field and plant use. The pH/Reference/ATC probes are all in one body. It's non-refillable, little or no maintenance required. You get portability and accuracy in one package.

  • Dry Contact Technology High accuracy Unlimited shelf life, can be stored dry No pre-conditioning or user maintenance required Robust, rugged and reliable Dry Contact Technology replaces traditional liquid or gel-filled ISE’s. Dry contact electrodes require no…

  • Dry Contact Technology Dry Contact Technology replaces traditional liquid or gel-filled ISE's. Dry contact electrodes require no preconditioning. Simply place electrode in a sample and read results. This innovative technology offers unlimited shelf life and greater measurement stability. …

  • Thermo Scientific Orion

    Electrode holders and stands Electrode holders and stands permit one-handed operation of electrode movement Four-position holders allow simultaneous use of pH or ISE electrode and reference half cell Swing arm stand (0732H82) allows flexible movement of electrodes. Holder…

  • labForce® (powered by Thomas Scientific)

    Unique Glass Membrane - The PHE-16 pH Electrode uses a special H glass membrane, with better accuracy and repeatability in strong base solutions; the hemispherical sensor is built tough and highly resistant to general impact. Silver Ion Trap Reference System - The PHE-16 pH Electrode uses a Silver…

  • Thermo Scientific Orion

    Thermo Scientific Orion filling solutions for use with pH electrodes and reference electrodes. Filling solutions are packaged as five 2 oz. (5 x 60mL) bottles.

  • Thermo Scientific Orion

    Sample well water, rain water, distilled/deionized water, boiler feed water, process water and more with the Thermo Scientific™ Orion™ pHISA™ Adjustor. It offers fast, accurate pH results in high purity and low ionic strength waters. Increases measurement accuracy …

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    Thermo Scientific Orion

    Use Thermo Scientific™ Orion™ pH Electrode Filling Solution with pH electrodes and reference electrodes. Packaged as five 2 oz. (5 x 60mL) bottles.

  • Application pH, titrations General Description The reference electrode is used as a pair with an indication electrode to make a measurement. All types supplied with a 30 in. lead. All reference half-cells have a universal reference pin connector. Legal Information Aldrich is a…

  • Immersion depth is 1 mm and requires only 0.5 mL of sample. pH range is 0-14. Temperature range: -5 to 100°C. Dimensions: 120 mm x 6 mm; tip diameter: 1.3 mm. Type reference: Ag/Ag/Cl.

  • Thermo Scientific Orion

    The ROSS series of electrodes provide readings stable to 0.01 pH in less than 30 seconds, even in the extreme case of samples varying from one another by 50°C or more. Results are three to five times more precise than those obtained with conventional electrodes. And, because drift is less than…

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    Mettler Toledo

    Refillable glass pH electrode with integrated temperature probe, accurate and fast measurements for a wide range of sample types. Special features Fast measurement in aqueous solution Integrated temperature probe Refillable reference electrolyte Mettler products are…

  • Solutions to clean, store and fill electrodes Extend the life of your electrodes and maintain accurate readings Use cleaning and storage solution with any pH or ORP electrodes Electrode storage solution keeps pH/ORP electrode bulbs moist for faster, more accurate readings. Use…

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    Thermo Scientific Orion

    4210B10 Optimal temperature range: 0 - 40°C Constructed with a clog-free Sure-Flow junction. Includes 60 mL of refill solution. Uses easily replaceable 4210B03 plastic membrane module. 4210B13 Highly selective for calcium over other divalent cations Polymer-membrane electrode measures…

  • Milwaukee Instruments

    Milwaukee has a wide assortment of pH, ORP, Conductivity and other specialty sensors to meet all your specific requirements. Finding the right electrode for a specific application is a very important task and in order to solve this selection problem it is important to consider the following:…

  • All-in-One electrodes feature a built-in temperature sensor for taking readings with Automatic Temperature Compensation (ATC). Single junction electrode for field, clean water, and general purpose applications. Electrode is 12 mm diameter with a 3 foot cable Electrode has a epoxy body,…

  • Sealed, single-junction electrode for general-purpose applications Epoxy body for impact resistance and durability Bayonet Neill-Concelman (BNC)-connected combination reference and measuring cell, for ease of use and to provide tight coaxial cable connections Small (6 mm) diameter for…

  • pH combination electrode with plug head, Glass shaft, platinum junction, electrolyte KCl 3 mol/l, Silamid®-reference system, sphere membrane, A-glass, tapper NS 14.5, length 103 mm 10 mm Ø, -5...+100 °C, 0...14 pH

  • Using Hamilton's patented Single Pore design, the Single Pore Glass has the highest accuracy and fastest response time. Widely applicable, it is great for use in emulsions, ion-weak media or general laboratory applications. Benefits Highest accuracy and fast response time thanks to the…

  • Solid State Technology Low maintenance High accuracy Robust, rugged and reliable Solid State electrodes have solid, homogeneous sensing elements. They are more rugged and easier to clean than glass or membrane sensors. Polishing strips for the solid state sensors are included…

  • The Oakton electrode storage bottle is used for pH electrodes that are up to 12 mm in diameter. A probe storage bottle is used to store an electrode during field and lab use. This bottle is to help protect an electrode from cracks, scratches, bumps, spills, and drying out. It helps keep the bulb…

  • Solid State Technology Solid State electrodes have solid, homogeneous sensing elements. They are more rugged and easier to clean than glass or membrane sensors. Polishing strips for the solid state sensors are included with the electrode. Thomas also offers a half-cell version that…

  • TRUEscience Item No. 1208375 S7 Male Head to Crocodile clips adapter cable, 1 meter long, to connect the TRUEscience cap to an external electrode source or flow cell. Note: The cable extends mV input only (not temperature) TRUEscience Item No. 1201274 Male S7 Head to Male BNC (BNS) Lead…

  • pH-combination electrode with sensor recognition, glass shaft, Pt junction, electrolyte KCl 3 mol/l, Silamid® reference, temperature sensor Pt 1000, sphere membrane, A glass, 2 m fixed cable with DIN + 4 mm banana plug and recognition, length 120 mm, 12 mm Ø, -5...+100 °C, 0...14 pH

  • Backed by our commitment to accurate and precise measurement, the OHAUS Starter Series of electrodes are designed to produce exact results time and time again. The Starter Series includes pH, reference, oxidation-reduction potential (ORP), conductivity, dissolved oxygen (DO), and temperature…

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    Thermo Scientific Orion

    The Orion ROSS® micro pH electrode is specifically designed to measure small samples. This unique design offers greater durability than conventional micro pH electrodes while providing all the performance benefits of a ROSS® electrode. The refillable glass ROSS micro pH electrode is compatible with…

  • Nothing is Impossible The more precious or limited the sample, the greater the challenge to use it for analysis. The narrow sensor shaft of micro pH sensors fits in nearly every sample container and enables measurements of sample volumes down to the lower μL ranges. InLab Flex-Micro:…

  • Solid State Technology Solid State electrodes have solid, homogeneous sensing elements. They are more rugged and easier to clean than glass or membrane sensors. Polishing strips for the solid state sensors are included with the electrode. Thomas also offers a half-cell version that…

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    Thermo Scientific Orion

    pH and temperature measurement with one electrode Superior stability with high accuracy pH and temperature measurement Fast pH response even in samples at varying temperatures Compatible with Mettler-Toledo TM Five and Seven Series meters and others which accommodate NTC30 thermisters with…

  • A pH electrode with a true flat membrane for surface measurements such as paper, agar plates or even skin. The robust plastic shaft with a ring diaphragm guarantees quick response though enhanced contact between the sample and reference. Benefits Fast response time because of enhanced…

  • pH combination electrode with plug head, Glass shaft, platinum junction, electrolyte KCl 3 mol/l, Silamid® reference system, sphere membrane, A-glass, length 120 mm, 12 mm Ø, -5...+100 °C, 0...14 pH

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