Whether you need a laboratory pH system or an in-line process electrode, use the tools below to help you find the right match for your application.
Designed for laboratory pH measurement, the pH Lab Configurator helps you build a complete system. Answer a few questions about your application and find the right electrode, calibration buffers, and accessories for your needs.
Designed for in-line pH measurements, the pH Sensor Finder helps you identify the right in-line electrode for your process. Answer a few questions about your application conditions to get a matched electrode recommendation.
Each of our pH electrodes is engineered around the demands of its application, combining precision materials with proven sensor technologies for laboratory and process use.
Glass membranes, reference electrolytes, and junction materials selected for each application type give you stable, reproducible measurements you can trust—whether in routine lab analysis or demanding industrial process conditions.
Our pH electrodes are built from high-quality materials and technologies to deliver a long lifespan, even under extreme pH, temperature, and pressure conditions. This means fewer replacements in the lab and reduced downtime in industrial process applications.
With Intelligent Sensor Management (ISM™) technology, our pH electrodes store their own calibration data, automatically recognize when connected to a compatible meter or transmitter, and alert you before maintenance is needed, keeping you in control of sensor performance.
Since 1948, METTLER TOLEDO has supplied pH measurement solutions for laboratory and industrial use, giving you access to decades of application expertise. Dr. Ingold's combination glass pH electrode was the company’s first major success, and his ingenious design still simplifies the way the world measures pH today.
At METTLER TOLEDO, we continue to combine Swiss craftsmanship and digital technology to produce our innovative pH electrodes. This video shows how we manufacture our Intelligent Sensor Management® (ISM) pH electrodes in Urdorf, Switzerland.
The right pH electrode depends on whether measurement is in a laboratory or an industrial process, and on the specific conditions of the application, including process chemistry, temperature, pressure, and regulatory requirements.
For laboratory users, the pH Lab Configurator walks through application requirements to build a complete pH measurement system including sensor, solutions, and accessories.
For in-line process applications, the pH Sensor Finder matches process conditions to the appropriate electrode from our Process Analytics range.
Laboratory pH electrodes are designed for manual or automated batch measurements in controlled settings such as titration, water analysis, and quality control sampling. They are used with benchtop pH meters or titrators and are optimized for accuracy across a wide range of sample types.
In-line pH electrodes are built for real-time measurement in industrial process monitoring and control applications, supporting both continuous and batch processes. They must withstand elevated pressures, extreme temperatures, aggressive media, and CIP/SIP cleaning and sterilization procedures. Retractable housings are available, allowing sensors to be serviced and calibrated without interrupting production.
Analog pH electrodes transmit a continuous mV signal to a separate transmitter or meter, which applies the calibration parameters and calculates the pH value. They are compatible with a wide range of standard transmitters and are a reliable choice for straightforward process applications.
Digital pH electrodes, such as those equipped with METTLER TOLEDO's Diagnosable, Efficient, and Sustainable (DES) technology, process the signal on the sensor itself and store calibration data, usage history, and diagnostic information on an internal microchip. This enables features such as Plug and Measure installation and predictive diagnostics, which are not available with analog sensors.
Digital DES electrodes require a compatible meter and Signal Bridge. The detachable Signal Bridge transmits calibration, diagnostic, and measurement data for superior user guidance and measurement efficiency to enhance cross-compatibility, reduce setup time, and promote sustainability.
