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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Problems at the wet end of a paper machine can rarely be corrected downstream. That is why monitoring and controlling pH in pulp stock is critical to the paper-making process. Essentially, at every stage in the manufacture of paper, correct pH values play a vital role. Variations in the pH value at the headbox have a negative effect on the quality of the paper produced. Proper monitoring ensures minimizing plugging and fouling problems that occur with pH measurements in paper mills. 

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