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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  • 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

  • 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…

  • Sealed Ag-AgCl Reference, Epoxy Epoxy plastic body incorporates glass electrode and sealed Ag-AgCl reference electrode in a single stem Range pH 0 to 14, 0° to 100°C Usable at pressures from 0 to 100 psig (690 kPa) Offered in choice of types, each with US Standard or…

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    Thermo Scientific Orion

    4210F12 For determination of fluoride ion activity in concentrations from saturated to 10 -6 M (0.02 ppm) Method approved by ASTM for water, drinking water, wastewater and seawater brines and it is approved by EPA, Standard Methods and AOAC for feeds Range saturated to 0.02 ppm Requires…

  • Glass Membrane Sensor High accuracy Reliable Economical Glass sensor electrodes are the best available method for measuring sodium ions. They are less expensive than solid state or dry sensing membranes and still offer a high degree of accuracy and responsiveness. …

  • These economical electrodes are ideal for field, clean water, and general-purpose applications. Single-junction, epoxy-body, gel-filled pH electrodes Pin-type junction provides low electrolyte flow for long life High range of 0 to 14 pH 3 foot (1 meter) cable

  • 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

    4210N68 Requires Thomas number 4215F60 reference electrode. Includes 760 mm lead. Uses Orion 900002 fill solution, order as 4215F70. Accessories Chloride Standard, 0.1000 ±0.0005M Chloride Standard, 100.0 ±0.5 ppm Ionic Adjustment Solution, Sodium Nitrate…

  • Sensorex

    Allows pH signal to be carried up to 1,000 feet Boosts signals of aging electrodes, providing readable, measurable results Interfaces with most pH meters Battery operated This pre-amplifier works with most pH meters, controllers and data acquisition systems. Input and output…

  • Genuine Hamilton electrolytes are needed to keep your laboratory sensors running smoothly. Complete the maintenance on your sensor by using Hamilton cleaning and storage solutions to ensure high accuracy and long life.

  • These ABS plastic electrodes are ideal for field applications. Use double junction for testing dirty water and solutions with heavy metals or organics. Completely submersible—including the extra-long 10-ft cable. Annular junction provides fast response and resists pressure effects of…

  • labForce® (powered by Thomas Scientific)

    Long-Life Reference System - The PHE-13 pH electrode uses a long-life reference system, composed of a glass, AgCl and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It…

  • 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

    Designed to meet the demanding needs of drinking water and wastewater applications Accurate results down to 0.01 ppm Linear electrode response down to low detection limits Response time of 1 minute in sample concentrations of 1 ppm and higher New wastewater applications developed…

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    Thermo Scientific Orion

    Ideal for all routine pH measurements. A large variety of quality electrodes for a wide range of applications. Includes specialty pH electrodes for unique or challenging pH measurements.

  • Thermo Scientific Orion

    Low maintenance and refillable electrodes that features an isolated Ag/AgCl reference system, so silver does not make contact with the sample.

  • 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…

  • Oakton

    Splashproof keypad Pushbutton pH/mV selection Simulates U.S. or NIST pH buffer values Oakton pH Simulator is an easy-to-use service tool for testing the accuracy of pH and ORP meters, controllers and transmitters.  Unit can simulate a variety of pH and mV values and it supports…

  • 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.

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    Thermo Scientific Orion

    4215F10 Mercury-free, Ag-AgCl type, with sleeve junction. Designed for use with Thermo Orion ion-selective electrodes as indicated in respective descriptions; usable also with glass electrodes for pH measurement. Range 10 to 100°C. Length 140 mm, diameter 13 mm. Diameter of mounting cap 16 mm. …

  • IDS ORP electrodes are used to measure oxidation or reduction potentials in waterous solutions - with integrated temperature sensor Safe measured values due to signal processing in the sensor Integrated temperature sensor NTC 30 kOhm for precise value documentation Best possible GLP…

  • Take high purity measurements with the highest accuracy and precision using the Thermo Scientific™ Orion™ 2001SC ROSS™ Combination pH Electrode. Combining pH sensing and reference electrodes, 2001SC provides a fast response for online pH electrodes. The Thermo Scientific…

  • Hanna Instruments

    HANNA offers a wide range of combination pH and ORP electrodes specifically designed for needs of industrial users. In order to reduce contamination problems, all electrodes are gel or polymer filled and feature double-junction technology. The BNC connector allows quick and easy connection to…

  • With an integrated temperature sensor, this maintenance-free gel-filled electrode covers most applications and offers automatic temperature compensation. Special features Unbreakable, chemically resistant POM shaft Integrated NTC 30 kΩ temperature probe Application …

  • Electrode Stand Cantilever Type, Each

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    Thermo Scientific Orion

    Superior stability pH range 0-14 Temperature of 0°-100°C 3 M KCl filling solution supplied with electrode

  • 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…

  • This combination pH electrode is especially made for measurements in very small volumes, such as vials, by requiring an immersion depth of only 7 mm. Benefits 3 mm shaft diameter for measurements in very small volumes (e.g. vials) Immersion depth of only 7 mm required Refillable …

  • 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…

  • 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…

  • Thermo Scientific Orion

    The Orion 9179BNMD and Orion 9180BNMD consist of a platinum redox sensor, a silver/silver chloride internal reference systems and a built-in thermistor for Automatic Temperature Compensation (ATC). Both models have the capability to measure ORP and Temperature simultaneously without a separate…

  • labForce® (powered by Thomas Scientific)

    Unique Glass Membrane - The PHE-15 HF glass membrane, which has a faster response rate, better repeatability in strong acid samples, and resistant to hydrofluoric corrosion. Silver Ion Trap Reference System - The PHE-15 pH electrode uses a Silver Ion Trap reference system. On top of the Long-Life…

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