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Home Process Analytics pH Analyzers & ORP Analyzers
Home Process Analytics pH Analyzers & ORP Analyzers

pH Analyzers & ORP Analyzers

In-Line pH Meters for Process & Water Applications

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A pH analyzer consist of a sensor, transmitter and process adaption, combined to best suit your pH control needs. In-line pH analyzers from METTLER TOLEDO provide accurate process pH measurements in a wide range of environments, from ultrapure water to hygienic measurement in a bioreactor to dirty chemical production. pH analyzers and ORP analyzers that use digital Intelligent Sensor Management (ISM) technology help reduce maintenance through integrated predictive diagnostics.
In-Line pH Probe / In-Line pH Sensor

In-Line pH Probes & Sensors

These versatile in-line pH & ORP sensors provide accurate, reliable measurements in a wide range of industrial process environments.
pH Transmitters

pH Transmitters

These transmitters are designed to integrate with analog and ISM sensors to provide measurement point integration and control.
pH Sensor Housing & ORP Sensor Housing

pH Sensor Housing & ORP Sensor Housing

These sensor housings provide a connection for a pH or ORP sensor into an industrial process. Housings are static, retractable or immersion.
Portable pH Meter

Portable pH Meters

This portable analyzer is designed for one-handed operation and easy, portable pH measurement in industrial environments.
Intelligent Sensor Management (ISM) Accessories

Intelligent Sensor Management (ISM) Accessories

ISM accessories and software helps calibrate your sensors away from the process while monitoring operating history and real-time diagnostics.
Single Use pH Sensors

Single-use pH Sensors

These single-use format pH sensors are designed for long-term stability in single-use bioreactor bag applications.
Buffers for In-Line pH Sensors

Buffers for In-Line pH Sensors

These buffers are designed for user-friendly calibration and maintenance of high accuracy pH measurement systems.

Useful Related Links

pH Theory Guide

pH Theory Guide

This guide explains both practical and theoretical requirements in depth so that the measuring principle is understood and an accurate measurement made possible. Read more

pH Calibration Guide

pH Calibration Guide

pH systems with Intelligent Sensor Management (ISM) drastically minimize the maintenance and workload, meaning far less time spent at measurement points. Find out everything you need to know about getting the most from your pH sensors in our new guide. Read more

pH & Dissolved Oxygen Accuracy Guide

pH & Dissolved Oxygen Accuracy Guide

High quality and efficacy of products and efficiency in production are the main goals in pharmaceutical manufacturing. To achieve these aims, production processes must be stable, predictable and operate consistently at the target level of performance. Read more

In-Line pH Measurement

In-Line pH Measurement

In-line pH measurement is well established in fermentation and other biochemical processes. But in the chemical industries it is viewed with misgivings. This white paper explores why these doubts exist and how, with modern in-line pH measurement technology, they can be forgotten. Read more

pH Control in Water Treatment

pH Control in Water Treatment

This application note on pH control in water treatment explains that although all power plants have unique variables, they all struggle with corrosion. The most common causes of corrosion are low pH levels, the presence of dissolved gas (oxygen), under deposit attack, and areas weakened by mechanical stress which ultimately leads to fatigue cracking. Read more

Process Analytics Catalog

Process Analytics Catalog

The METTLER TOLEDO Process Analytics Catalog provides a comprehensive overview of solutions for analytical measurements in liquid process applications, pure water monitoring and gas-phase measurement. Read more

Explore our Services - Tailored to Fit your Equipment

We support and service your measurement equipment through its entire life-cycle, from installation to preventive maintenance and calibration to equipment repair.

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Uptime. Support & Repair

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What is a pH analyzer?

A pH analyzer is a system used for in-line pH measurements, typically in an industrial process. A pH analyzer generally consists of three components: a pH sensor, a transmitter, and a process adaption or housing unit. Together, these three parts make up a process pH analyzer used for control of pH in an industrial environment. METTLER TOLEDO provides a wide range of different pH sensors to meet your in-line pH measurement needs. Additionally, many pH sensors also offer a redox measurement so that integrating a pH analyzer also lets you install an ORP analyzer.

What is pH?

pH (potential of hydrogen) is a figure used to express the acidity or alkalinity of a water based solution on a logarithmic scale. On this scale, 7 is neutral with lower values being more acidic and higher values being more alkaline. In process applications, pH is generally measured with an in-line pH analyzer most commonly integrated using a glass combination electrode for industrial pH measurements. Additionally, an in-line pH analyzer generally requires a process adaption, cable and transmitter to complete the pH analyzer.

What should I look for in a pH analyzer for pure water applications?

pH measurement in pure water requires a pH analyzer that ensures a consistent, stable measurement. Sensors like METTLER TOLEDO's pHurepH sensor feature a special low-resistance pH glass membrane, shielded flow chamber and a continuous outflow of electrolyte. Features like these and others allow for the stable and accurate measurement of pH and ORP that is required in pure water applications at power plants and microelectronics facilities.

What should I look for in a pH analyzer for industrial process applications?

pH measurement in industrial applications requires a pH analyzer that meets your specific application needs at the installation point. This can range from requiring a pH analyzer where the sensor is durable and has the ability to perform at high pressures and temperatures in harsh manufacturing environments, to a pH analyzer with a pH sensor that can be steam sterilized or cleaned in an autoclave in pharmaceutical applications. 

METTLER TOLEDO produces a wide range of sensors for in-line pH meters and pH analyzers, including the refillable InPro 2000, the InPro 3250pH sensor family and a range of very robust titanium shaft pH sensors.

What is a pH analyzer with Intelligent Sensor Management?

A pH analyzer with Intelligent Sensor Management (ISM) technology is an analyzer that is compatible with METTLER TOLEDO ISM pH and ORP sensors. This technology enables several benefits for your pH analyzer, including: 

A strong digital signal from the pH sensor to the pH transmitter, preventing interference with the measurement.

Predictive diagnostics displayed on the screen of your pH transmitter or accessible on your higher level control system if your pH analyzer is integrated via a PLC. These diagnostics help plan sensor maintenance, calibration and cleaning.

Plug and Measure technology, which allows you to calibrate your pH sensor in a safe environment away from the process and then quickly install the sensor into your pH analyzer without on-site calibration.