Process analyzers are online tools for the determination of chemical composition and physical properties of substances used in industrial processes. They enable process optimization, asset protection, and compliance with environmental regulations.
With one of the most comprehensive families of sensors and online analyzers for pH, conductivity, dissolved oxygen, combustion oxygen, humidity, liquid and gas density, and process gas chromatography, Yokogawa is recognized as a world leader in the analytical equipment field. Accurate and repeatable measurement is the key to obtaining optimal results in your process, and Yokogawa's diagnostic-based analytical instrumentation offers the flexibility to meet a range of individual requirements. Whether for liquid or gas applications, our analyzers can resolve even the most demanding situations. Yokogawa's process analytics solutions help to protect the environment by reducing energy consumption and CO2 emissions.



OpreX Analyzers belongs to the OpreX Measurement category of the comprehensive OpreX brand for  Yokogawa's industrial automation (IA) and control business. A group of analyzer products that accurately measure physical properties such as chemical composition, pH, and conductivity with excellent reproducibility and convert this data into digital form. With their high precision and high reliability, these sensing solutions help to improve operating efficiency and safety, and protect the environment.


  • Gas Analyzers

    • Gas analyzers
    • Real-time gas analysis
    • Enhances efficiency, safety, throughput, product quality
    • Ensures environmental compliance
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  • Analyzer System

    Process analyzer system integration provides solutions for gas and liquid measurements to support product refinement, process efficiency, and safety.

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  • Product Finder

    This web tool makes it easier to find products according to the application, measurement conditions and required specifications.

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Success Story:

CENTUM VP Cuts Clean-in-place (CIP) Time by 50% and Improves Productivity


Prevent costly downtime and process equipment failures with real-time pressure monitoring. Yokogawa’s Sushi Sensor is the optimal choice for industries depending on bottled gas in essential procedures.


The quality of paper for printing or writing should be high and it depends on many parameters. Cobb is one of the parameters, which requires control. Using a retractable fitting, this optimum pH level can be achieved by using Yokogawa's 4-wire pH Analyzer with a suitable, retractable fitting and sensor. Since a separate controller is not required for the dosing pump, this solution provides a cost-saving.



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