Hamilton is accredited as a manufacturer of certified reference materials in accordance with ISO 17034

Bonaduz, Switzerland, May 12th, 2026 - Hamilton was recently accredited as a manufacturer of certified reference materials in accordance with ISO 17034. The certification of the company’s pH buffer solutions and conductivity standards was granted by the Swiss Accreditation Service and highlights Hamilton’s consistent commitment to the highest standards of quality, reliability, and compliance in the field of process analytics. With 14 pH values in up to six sizes and eleven conductivity standards, Hamilton offers a broad product portfolio that has been measured in accredited laboratories. The most important of these products are certified reference materials produced in accordance with ISO 17034, and all are tested in accordance with ISO 17025.

For users in regulated environments, particularly in the pharmaceutical industry and biotechnology, the certification brings significant advantages. This is because it ensures metrological traceability and confirms long-term stability, and reduces the audit risk for GMP/GLP laboratories. Another aspect certified under ISO 17034 is compliance with legal regulations, as well as support for method validation, method verification, and instrument calibration in audit processes and qualification procedures. 

“A sensor is only as good as its calibration. We have recognized that our customers need calibration solutions of the highest level, they can rely on and that deliver outstanding results”, explains Eric Hess, Product Manager at Hamilton Process Analytics.

Hamilton calibration solutions meet high demands 

Hamilton’s ISO 17034-certified pH buffer solutions are characterized by proven stability of up to five years, even after the bottle has been opened. The solutions are available in package sizes ranging from 250 ml to 25 l. Sizes up to 500 ml come with an integrated calibration vessel that prevents contamination of the solution and reduces buffer consumption to just 15 ml per calibration. Due to the variety of sizes, they are used in both laboratory applications and large-scale production processes. The measured pH value is certified by accredited laboratories and is based on two international reference standards (NIST and PTB).

Hamilton also offers “best-in-class” products for conductivity standards. The company is the first manufacturer worldwide to offer these with values of 1.3 µS/cm and 5 µS/cm, featuring a certified accuracy of ±1 % and documented shelf life. A patented glycerin matrix formulation effectively prevents CO₂ absorption from the air and ensures a shelf life of up to three years after opening. The standards have also been tested by accredited laboratories and meet the requirements of the United States Pharmacopeia as well as other international pharmacopoeias.

All certificates and safety data sheets can be accessed digitally via a QR code on the bottle and are available for download. The homogeneity and stability studies were conducted in full compliance with the requirements of ISO 17034 and ISO 33405, respectively, and the reported measurement uncertainties were calculated in accordance with the GUM principle.

“ISO 17034 certification proves that our certified reference materials are produced under the strictest quality requirements, with traceability and reliability as core principles,” explains Eric Hess. The certified solutions are now available through the Hamilton web shop and the authorized dealer networks.

About Hamilton:

For more than 75 years, Hamilton Company has been a global life sciences leader in the design and manufacturing of precision measurement devices, automated liquid handling platforms, and sample management solutions. Headquartered in Reno, Nevada, with key manufacturing and R&D affiliates in Bonaduz, Switzerland, Franklin, Massachusetts, and Timisoara, Romania, Hamilton serves the scientific community through a robust network of sales and support offices worldwide.

Hamilton's expertise spans across liquid handling, process analytics, robotics, and automated storage, providing the foundational tools necessary for groundbreaking scientific research and clinical discovery. By combining the best-quality materials with skilled workmanship and a lifelong commitment to ISO 9001-certified precision, Hamilton ensures the highest level of performance and reliability. Hamilton remains dedicated to driving innovation and satisfying the evolving needs of laboratories across the globe, maintaining a steadfast focus on quality and customer success.