The most advanced water analysis sensors, measurement, and control technology

Engineered and manufactured in Germany. Used around the world

Kuntze Instruments specializes in designing and manufacturing high quality solutions in water analysis. Our key performance area is the production of sensors for measuring disinfectants, pH, redox potential, and gases. At the same time, we offer our customers integrated, connected measurement systems for industrial applications such as process, cooling and wastewater treatment, as well as drinking water measurement and swimming pool maintenance. Innovation is our main driver. Beyond delivering excellent quality products “Made in Germany”, we are constantly driving progress in water analysis. This is what Kuntze, as a family-owned company, has represented for more than 77 years and three generations.

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Kuntze sensors are durable, low-maintenance and accurate


Kuntze sensors enable a constant, low-maintenance and accurate measurement of disinfectants such as free chlorine, chlorine dioxide, ozone, and hydrogen peroxide. Kuntze exclusively employs an open sensor technology. Open sensors offer a major advantage: there is no need to replace membranes, electrolytes or reagents, and there are no error-prone, moving mechanical parts. In combination with our Automatic Sensor Cleaning, Kuntze sensors are reliable even in difficult water conditions.


For pH measurement, we offer a wide range of different sensors, from universal use in various waters, to special solutions for challenging environments. High-quality components such as glass membrane, diaphragm or electrolyte ensure the most accurate measurement results in a wide range of temperatures and pressures. We also offer our pH sensors with a hose connection for refillable electrolyte and salt bridge to ensure low-maintenance operation.

Redox potential

For reliable measurement of redox potential (ORP), Kuntze has been engineering and manufacturing universal sensors for drinking water, wastewater, and process water treatment applications for decades as well as developing extremely robust sensors for demanding chemical environments. The sensors are made of high-quality glass shafts and the durable Zirkon diaphragm, surrounded by low-maintenance electrolyte. The noble metal electrodes are made of purest material and produce stable measurements. 


In a conductivity measurement, we offer both conductive and inductive sensors that have been specially developed for use in cooling water, drinking water, and process water environments. The core of our conductive sensors is a two-electrode measuring cell made of stainless steel, which is highly resistant to contamination and easy to clean. Our inductive sensors are assembled from two inner ring-shaped measuring loops encased in a corrosion-resistant outer housing made of polypropylene. All Kuntze conductivity sensors come with integrated temperature sensors.


Besides technology for measuring the most important water characteristics, Kuntze also specializes in the production of sensors for gas measurement plant rooms. Our products detect chlorine, ozone, and chlorine dioxide gas e.g. in storage rooms or exhaust air systems. They feature short response times, are manufactured in Germany by highest material and quality standards, can be installed easily, and are user-friendly due to imprinted calibration values.

Our core value: Expert sensor manufacturing - Made in Germany

Scalable sensor production thanks to our manufacturing site in Hartha/Germany

We are proud to claim that all components of our water analysis sensors are manufactured at our German production site in Hartha. We employ professionally trained technical glassblowers who manufacture innovative products with unparalleled precision, designed  at our headquarters in Meerbusch near Düsseldorf, Germany. Our state-of-the-art Hartha manufacturing site, which was massively expanded in 2018 and 2021, enables us to serve individual,on-demand customer requests and manufactur sensors for disinfection, pH, and redox measurement in high volumes.

Kuntze Krypton® Multi save costs in a Canadian sureface water drinking system

To measure and control disinfectant residuals, a public surface drinking water system (DWS) located in Alberta, installed Krypton® Multi systems including Kuntze’s patented ASR® Automatic Sensor Cleaning technology. After a one month trial, the systems provided by Kuntze became the preferred technology to monitor and control the free chlorine residuals.

Duncan Family Farms installs innovative water treatment system

Duncan Family Farms, a US family-owned organic produce grower with more than 7,000 acres of land, uses a highly effective and portable irrigation water treatment system developed with by Kuntze. This innovation has reduced chlorine consumption and lowered costs. This technology can be applied to many other agricultural applications.

A unique family story with inspiring innovative products

77 years Kuntze Instruments

Automatic Sensor Cleaning

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Kuntze Instruments | USA