DEF : builder of solutions and services for fire safety systems

Our added value

At DEF, we rely on our own production sites, our R&D experts, product specialists and teams of professionals to support you and advise you throughout your project.
Based on a fire risk analysis of the operation, we offer you the most relevant solutions and services in terms of security.
Our flexibility also guarantees the customisation of our solutions and services tailored to your needs.
Whether you are prescribers, installers, industrial or service contractors: you will find the answers at DEF tailored to your specific fire safety issues.

A trusted partner

Beyond our historical role as a manufacturer, we put our expertise at your service at every stage of your project.
Upstream, we assist you in the qualification of your requirements and specification of suitable solutions.
Downstream, we have all the necessary skills and certifications to ensure the installation, commissioning, maintenance of systems and reconditioning of detectors.

Committed to favouring a genuine close relationship with each of you, we have also developed a sales network throughout France and since 1976 have been growing steadily overseas.

DEF is a part of the DEF Network, a network of companies that are experts in fire safety.

A single representative relying on a network of DEF experts

DEF is the historic core of the DEF Network, a network of expert fire safety companies and a key player on the European market. As an international and independent network, the DEF Network proposes a complete offer in the SSI sector, which includes not only detection and extinguishing, but also the related know-how: safety PA system, management of emergency exits, smoke extraction and compartmentalisation. Through its expert and complementary companies, the DEF Network provides products, solutions and services for projects of any complexity.

International expertise

Based in Massy (91), the DEF Network has five production plants located in the Loiret (45), two in the Paris region, one in Midi-Pyrénées, one in Italy, one in Germany and one in China. Our presence in many countries in Europe, Africa and Asia enables us to deal with a wide variety of issues.
By this exchange of experiences, we are continually enriching our offer, to best meet your requirements.

Customised Services