Single-Use pH Measurement

Hamilton OneFerm single-use pH sensors offer a cost-effective solution for integration into single-use systems. Built on established technology from traditional sensors, they provide the perfect balance of high reliability and value.

Oneferm ph sensors

Reliable pH measurement for single-use processes.

OneFerm is a family of pH sensors specifically designed for single-use applications in the pharmaceutical and biotechnology industries. Building on Hamilton's proven pH sensor technology, OneFerm has become a widely adopted solution for reliable pH measurement in single-use bioprocessing systems.

The OneFerm sensors utilize a biocompatible electrolyte in combination with Hamilton's pH glass technology and clog-free diaphragm design. This construction enhances measurement stability and accuracy while maintaining low drift throughout the sensor lifetime. The sensors are designed for long dry storage and retain high measurement performance after gamma irradiation, making them well-suited for modern single-use manufacturing environments.

Delivered ready to use, OneFerm sensors are pre-installed into single-use assemblies and pre-calibrated, eliminating sensor installation and preparation steps prior to process start-up. The sensors provide reliable pH measurements throughout the process while supporting operational flexibility and reducing contamination risk associated with single-use technologies.

OneFerm sensors are suitable for use in single-use bioreactors, including bag and rigid vessel systems, single-use mixers, and downstream processing applications.

Benefits of using Hamilton Single-Use pH sensors

  • High Accuracy

    Features the high accuracy and performance of a traditional glass pH electrode, even after gamma irradiation and dry storage.

  • Ready to Use

    OneFerm pH sensors are certified bio-compatible and shipped pre-calibrated for immediate use, featuring a short wet-in time.

  • Reliable Measurement

    Offers the reliability and stability of reusable sensors with exceptionally low drift.

View all Single-Use pH Measurement sensors

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Learn More About Our Single-Use Sensors

Anatomy of the VisiFerm SU Dissolved Oxygen Sensor

OneFerm pH Sensor Anatomy

Traditional versus Single-Use Sensors in Single-Use Applications: 

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Criteria Description
Shaft Length Options:70 mm, 120 mm, 160 mm, 225 mm, 325 mm, 425 mm
Electrical ConnectorK8, VP6 
Temperature SensorPT100, PT1000 / NTC 22 kOhm (Arc) 
pH Measuring Range3–10 
Drift< 0.1 pH /week
Wetted PartsGlass / VMQ (Silicone elastomer)

Accessories for the OneFerm pH Sensors

Arc Module SU pH

The Arc Module is intended to be used with the dedicated OneFerm pH sensors for the measurement of pH values in single use applications.
Hamilton Arc pH sensor module with blue anodized ring, metallic body, and multi-pin connector

pH Insert

The pH Insert is a single-use connection for the OneFerm pH 70 mm sensor. It can be integrated into the single-use container for a single application of pH Insert and sensor.
Ph Insert connector Single Use sensor Connection

Arc Wi Pivot

The Arc Wi Pivot family offers a compact, pivoting adapter that enhances installation flexibility and delivers clean, stable 4–20 mA signals with galvanic isolation.
Arc pivot bt ma 2

Sensor Cables

Hamilton’s cables for sensors are the best cables and sensors in the market and offer noise free communication for your analytical measurement needs.
Cable For Sensors

Data Cable

Data cables are designed for use with Arc sensors to provide 24VDC power and transmit 4-20mA and Modbus output signals - 10 Meter Length.
sensor data cable vp8 to open end

Transmitters

Hamilton Transmitters ensure reliable measurements on demanding applications. The intuitive operation and smart monitoring minimize downtime and keep processes running at peak performance.
Hamilton H220X process transmitter with LCD display, four function buttons, rotary knob, and cable glands

Single-Use pH Measurement Resources

Browse app notes, user guides, specification documents, and more in our Knowledge Center.

Browse app notes, user guides, specification documents, and more in our Knowledge Center.

Browse app notes, user guides, specification documents, and more in our Knowledge Center.

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Article

Sensor Security with Operator Level S Password

To enhance the security of your sensors and ensure that changes are monitored, Hamilton strong-ly advises updating the default Operator Level S password on both the sensor and the ArcAir software. Find out how in this article.
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Article

Warnings and Errors with Arc pH / ORP Sensors

The advanced diagnostics of Hamilton Arc pH / ORP sensors are indicated by warnings and errors. This article dives into the different types of warnings and errors as well as how they are defined.
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Article

Glossary of Sensor & Biopharma Acronyms & Abbreviations

Acronyms and abbreviations are commonly used with process analytics measurements found in the biopharma industry. This glossary is an attempt to de-code some of the more frequently used acronyms.

Browse app notes, user guides, specification documents, and more in our Knowledge Center.

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FAQ

Are Arc Modules reusable in single-use applications?

Discover how Arc Modules are used in single-use applications and what role they play in sensor integration.
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FAQ

Where can I find documentation and certificates for my sensors?

Paper copies sensor information such as manuals, declarations of quality, and material certificates ship with the product. Hamilton also has several website resources to find related information. Click on the FAQ to learn more.
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FAQ

Do Hamilton single‑use sensors require calibration before use?

Find out how Hamilton single-use sensors are prepared for use and when additional calibration steps may be considered.

Services

Installation Support

Installation, set-up, and calibration support directly on-site. Our field service team ensures your sensors and cables are installed and functioning correctly.

Qualification IQ/OQ

Support for the qualification of Hamilton equipment including complete documentation. Readying your process for GMP manufacturing activities.

Maintenance and Calibration Services

Preventative maintenance and regular service contracts. Schedule on-site service dates to ensure your sensors are properly maintained and your process is optimized.

On-Site Service Diagnostics

Diagnosing and resolution of process system problems on-site. Finding the root cause and presenting a solution to fit your needs.

On-Site Training

User trainings and on-site trainings for technicians. Tailored training ranging from basic operation to advanced calibration and maintenance.

Application and Technical Support

Hamilton's Technical Support team is here to provide product trouble-shooting, repair, application support, virtual start-up support, and more.

Backed by world-class service and support.

For over 75 years, the Hamilton name has been recognized globally for its unwavering commitment to quality. That pledge extends to creating long-term customer partnerships. We're proud to offer in-depth training courses, on-site field support, custom product builds, and so much more.

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