Sterner AS
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Sterner service

Sterner - At your service

Our service center is dedicated to serving customers providing technical service and support. Our engineers have extensive experience and knowledge ensuring you the best quality in regular maintenance.

We are proud of the rapid response and high competence of our service staff.

For inquiries during working hours, call us on +47 64 85 94 20 or send an email to

24-hour service

Most plants operate 24/7, and critical errors may occur at any time. With our 24-hour service, you can be sure, no matter what time of day, that you will get the help you need.

If there is a critical error outside working hours or during the weekend, our 24-hour on-call staff is ready to help.

For inquiries during working hours, call us on +47 64 85 94 20 or send an email to

Service contract

With a service contract, you can be sure of smooth operation of your systems at all times, and most of our customers have one. With regular maintenance on your systems, you can be sure of a safe operation for years to come with no surprises.

Feel free to fill in the contact form, or send an email to, if you want to know more about our services, or if you want a proposal for a service contract.

Available throughout the country

Sterner has 5 technical centers distributed across Norway. Each location has well equipped service crew and vehicles that provide immediate repair and service possibilities across the country.

To reduce delivery times we have a well stocked warehouse just outside of Oslo. We also have a workshop for repair work, maintenance and calibration.


Is your UV system more than five years old? If that is the case, the systems most likely will need some work. If left without service, systems will lose efficiency and the energy costs will be high. New lamps, ballast cards as well as wipers, brushes, sensors and sleeves will however make your systems perform at its best.

Our components are carefully selected to give the best output.

We offer a wide range of products in water treatment. You will find a collection of spare parts and components in our webshop.