Innovations in Electrochemistry
HAMILTON manufactures more than pH sensors. Our electrochemical sensors are reliable tools for application-oriented use and are characterized by high quality, long life and competitive pricing. In order to meet these rigorous requirements we are constantly striving to find unique sensor designs. Extensive work by our research and development department enables HAMILTON to offer the following detailed solutions:

HAMILTON pH glasses:

Guarantee the accuracy of your measurements.

Continuous improvement to our pH glass provides benefits that have not been previously available.

Our high performance glasses, the PHI glass and the recently developed HB glass, were developed to withstand frequent steam sterilization, autoclavation and CIP cleaning using hot caustics. PHI and HB glass provide the lowest drift and show almost no shift after sterilization and cleaning procedures.

The HAMILTON H glass has excellent aging characteristics and offers stable readings even in samples with a low water content such as anhydrous or only partially aqueous solutions. The low alkali error of H glass means accurate measurements even at high pH or high operating temperatures.

HF glass is one of the latest developments to ensure the longest possible lifetime in processes containing hydrofluoric acid. Most electrodes for low-temperature applications have a membrane made of V glass. This unique development has a very low membrane resistance.

Generally, our pH glasses allow you stable measurements for a long time.


Most innovative polymer reference electrolyte.

FOODLYTE was developed especially for the needs of the biotechnology, pharmaceutical and food industry. FOODLYTE withstands sterilization and cleaning in place (CIP) up to 135 °C and it can be used up to 6 bar pressure. TÜV Rheinland Produkt und Umwelt GmbH confirms: "This product complies with the German Food and Feed Act (Lebensmittel-Bedarfsgegenstände- und Futtermittelgesetzbuch: LFBG, §2 (6) 1) in conjunction with EC Regulation 1935/2004: The product is a commodity which is intended and foreseen to come into contact with foodstuffs."

FOODLYTE is taste- and odourless and harmless for micro organisms. The biocompatibility is approved by MDT1 according to EN ISO 10993-52 and USP 31, 2008 Chapter 873 and according to international GLP4 guidelines.



The oxygen sensor OXYGOLD B:

Dissolved oxygen measurement with absolutely no interference from CO2

Dissolved oxygen is an important parameter used to control the shelf life of beverages, especially beer, sweet soda drinks and fruit juice.

The traditional technology used to measure oxygen in these applications has been based on an amperometric, membrane-covered Clark cells filled with alkaline electrolyte. The gases from the sample diffuse through the membrane resulting in a measurement signal when they react with the the sensor. Guess what happens when the pH of the electrolyte changes? The measurement performance will change and so will the signal. This is the case when acidic gases like carbon dioxide are present. They change the pH of the originally alkaline electrolyte in the Clark cell. The results are drifting and uncertain measurements.

HAMILTON invested a couple of years in the development of the unique OXYGOLD B sensors that are filled with a CO2-stable acidic electrolyte called OXYLYTE B. The unique performance of this dissolved oxygen sensor has made it a reliable measuring tool for breweries around the world!


Conductivity Standards:

Certified from an accredited laboratory. Fulfills USP chapter 625 requirements.

HAMILTON is the first seller worldwide of conductivity standards at 1.3 and 5 µS/cm with a certified accuracy of ±1 % and a durability of 1.5 or 3 years. The composition of these standards is patented. The measurement procedure for determining conductivity has been developed in collaboration with DFM1. Governmental metrological institutes that deal with measurement of electrolytic conductivity have become aware of these HAMILTON standards, since they lie in a low conductivity range and exhibit a previously unknown level of stability which has been confirmed by measurements done by PTB2. In an interlaboratory test among prestigious European metrological institutes (PTB, DFM, DKD3), HAMILTON standards were used as a measurement solution.

1 DFM: Danish Institue of Fundamental Metrology, Lyngby / DK
2 PTB: Physikalisch-Technische Bundesanstalt, Braunschweig
3 DKD: Deutscher Kalibrierdienst

Duracal pH Buffers:

Certified from an accredited laboratory. 5-year stability and easy handling.

A complete range of patented pH buffer solutions provides never before achieved pH stability. HAMILTON guarantees DURACAL pH buffers to last for five years from the date of manufacture. The pH 9.21 and pH 10.01 buffers are even stable in air. High buffer capacities enable quick and stable calibrations.

Closed-loop traceability: In contrast with other manufacturers who operate with a hierarchical (top-down) traceability, HAMILTON has developed a new approach featuring "closed-loop" traceability. For users of DURACAL pH buffer solutions this means a unique level of reliability.

Top-down traceability: With HAMILTON the pH value of the DURACAL buffer is determined by a comparison with two secondary reference solutions.

Bottom-up traceability: From each lot manufactured, a representative quantity is measured at DKD. This ensures an external independent verification by an accredited institute.

The DKD issues an official calibration certificate for every DURACAL batch manufactured.



Tested quality:

Results of the final check documented in a Declaration of Quality.

For many of HAMILTON’s pH sensor types, the results of the final checks are shown in a "Declaration of Quality". Furthermore, the Declaration contains information about the materials of the sensor which are in contact with the medium.

All HAMILTON sensors are provided with a serial number.