NSC develops and manufactures voice alarm systems, evacuation amplifiers, loudspeakers and fire detection equipment at Schloß Holte-Stukenbrock, stating conformity with EN 54-4, EN 54-16 and EN 54-24 and full compliance with DIN VDE 0833-4. Third-party fire-product certification is evidenced by a BOSEC fire-detection certificate issued by the Belgian certification body ANPI, number B-9354-FD-1047-a, alongside a VdS-issued DIN EN ISO 9001 certificate. More than a hundred staff supply over fifty countries through NSC subsidiaries.