Equipment for gas and water analysis

We measure quality.

Our promise: durable, reliable products that give you clear and dependable readings around the clock. Developed under ecological aspects. Powerful made in Germany.

Family business with passion

We are Gröger & Obst

Our course: Always one step ahead.
We approach our daily work with this in mind. We develop our solutions ourselves and implement them directly at our company headquarters in Upper Bavaria. As an owner-managed company, it is a matter of honour for us that all devices bearing our name must perform reliably and last a long time.

A course that has helped us to establish ourselves as a force to be reckoned with in the water and gas analysis market since our foundation in 1986.

Gründer & Geschäftsführer Helmut Gröger bedient ein Messgerät
Where are our products used?

Areas of application & industries

Our products for water analysis are suitable for a wide range of different applications: for plant monitoring of wastewater treatment plants, for monitoring industrial wastewater from sewage plants, for surface water monitoring of airports and refineries, for drinking and process water monitoring, in water quality control and for the simplification of country-specific wastewater levy regulations.

In the field of gas analysis, our instruments support the aviation industry in monitoring cabin air, hospitals in monitoring air conditioning systems and sewage treatment technology in monitoring methanol. In addition, they are used in research facilities in the ultra-pure gas and breathing gas sector, in chemical laboratories, in the chemical and petrochemical industry, in clean room monitoring, filter monitoring and in immission and emission monitoring.

Stockbild Wasserüberlauf
Einsatzbereich chemische Labore. Man sieht wie mit einer Pipette Flüssigkeit in Reagenzgläser getröpfelt wird.
What distinguishes us from others

Why Gröger & Obst?

We are happy to accommodate your wishes in the design of our units. Whether wall mounting, table-top units or even the smallest designs – together we will discuss which solution we can implement for you. Our almost 40 years of experience in gas and water analysis allows us to configure the ideal instrument for your application. We always pay attention to maximum simplicity of design and usability.

Our units can be operated safely and conveniently from the front. All hose lines are colour-coded to make servicing and maintaining the equipment even easier and safer. Our infinitely variable peristaltic pumps are also equipped with transparent hoses for uncomplicated visual control.

With an analyser from Gröger & Obst you make a good and safe choice. For today and for the future. You can rely on it!


Gröger & Obst stands for a lot, but not for standing still. Our developers are constantly looking for innovations and upgrades for our devices


As a family business, trust, honesty and partnership are particularly important to us.

High quality

Sustainability and durability are what make our appliances so distinctive.


Individual advice is indispensable for us. Preferably on site, where we can immediately get an idea of ​​your specific requirements.

Customer references

What our clients say about our work

We have been ordering spare parts for gas and water analysis for our analytical instruments from Gröger & Obst for many years. With the current situation on the world market, prices are kept constant over a long period of time and delivery times are also short as long as the items are in stock. We are pleased to be able to work with such a reliable supplier.
Dear Gröger & Obst Team, Since 1999 we have purchased several GO-TOC analysers from you. For over 20 years, your analysers have been running to our complete satisfaction. Low maintenance and minimal replacement and wear costs characterise your units. If minor technical difficulties did occur, you solved the problem immediately and rectified it. We can recommend your equipment without reservation.
A good 30 years ago, the Dachau wastewater treatment plant was due to purchase a TOC device. After looking around the industry, we realised that most devices are either too expensive, too complicated, too fragile or simply no good. Until we came across Gröger & Obst. Finally, a simple TOC without bells and whistles that also works. Mr Gröger and his colleagues are always open to questions or suggestions. Such cooperation pays off for both sides in the long run.
Our portfolio

Analysis technology for a wide range of industries

Gröger & Obst is a leading provider of state-of-the-art measuring systems, services and solutions in the field of gas and water analysis. In addition to online TOC meters, our portfolio also includes filter and sample preparation systems for the continuous detection of total organic carbon (TOC) in water or gas.

Different measuring components and designs enable us to offer the right solution for the specific requirements of your industry. This makes our technology for analytical measurements both individual and multifunctional.

Our measurement systems are used wherever air and water contamination must be detected and reduced at an early stage, even in sensitive areas such as hospitals, laboratories, clean rooms, but also in air traffic, sewage and waste water treatment plants or refineries.