pH and ORP are critical measurement and control parameters for many liquid processes. Hamilton Process Analytics offers a wide selection of sensors for use in all bioprocesses, as well as many other industries that require high accuracy and reliability from their sensors. Hamilton is one of the few manufacturers to have multiple pH membrane glass options and reference designs to tailor the sensor for the specific application.

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Pre-pressurized pH and ORP sensors from Hamilton solve the problem of reference poisoning and clogging which shortens the lifespan of standard sensors in bioprocess applications.


Refillable pH sensors offer the ability to replenish the reference electrolyte as it is consumed by the process. These products offer exceptionally long life and stable, accurate measurements.


Polymer-filled pH sensors offer low maintenance and good chemical resistance for many pH measurement applications.

Viscous Liquid-Filled

Viscous liquid gel-filled sensors provide a suitable upgrade for the entry level sensors used in many industries. The added viscosity of the electrolyte helps slow the ingress of process contaminants from poisoning the reference element.

Single Use

Hamilton OneFerm single use pH sensors rely on a proven glass electrode design that has been fully tested for use in single use bag and bioreactor applications.

Half Cell

Half cell electrodes are designed for specific applications where the reference will be replaced separately.


Hamilton's knowledge base provides a range of explanatory articles, frequently asked questions, and document downloads.
  • Guide - pH Measurement

    Want to learn more about pH? Look no further than the Hamilton pH measurement guide. This download provides a comprehensive overview of how these sensors work, calibration, handling, and storage.
  • Brochure - BioPharma

    Innovative solutions for process analytics in biotechnological and pharmaceutical industries.
  • Brochure - Brewery

    Learn about our control and analytical solutions that are essential to the brewing process.
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