AirSep Inc.

AirSep is the world's foremost producer of self-production generators for both medical and industrial use. The company is represented in over 100 countries and Sterner AS is the supplier of these products in Norway.

Krone Filter Solutions

Krones filter protects the most important components of the plant from pollution. Continuously increasing quality requirements as well as process-related pollution make filtration indispensable. Sterner can offer filter solutions for all applications.

NP Innovation AB

... develops, produces and sells pressureless filter systems of the type of drum and disc filters. Function and design taken care of in such a way that operation, maintenance and service life represent the best available on the market. The filters are simple with good operational reliability and low maintenance requirements and are specially used for purification of process and wastewater from infestation plants. They are also installed in various industrial applications as well as in drinking water treatment and polishing of wastewater at municipal wastewater treatment plants.


Nijhuis Industries delivers solid solutions for sustainable water use & resource recovery, with the highest level of intelligent innovations across a wide range of industries. We meet today’s challenges as well as those of the future, as a response towards a CIRCULAR economy in a ‘fluid’ world.


Oxyguard International AS is our supplier of oxygen systems and accessories. Since 1987, they have supplied oxygen meters to the fish farming industry and developed their PC-based monitor and control system Commander in 2001.


One of the world's largest manufacturers of ozone and UV systems. Wedeco has a wide range of models and sizes that embrace widely in terms of both the amount of water and the type of water to be disinfected. Today, Wedeco's UV plants are installed in waterworks, ships, wellboats, industry, fish farms, sewage treatment plants, etc. Worldwide. In Norway, Sterner holds the leading expertise and experience on Wedeco products.