DRRR

Deutsches Referenzbüro für Ringversuche und Referenzmaterialien (DRRR GmbH) is a Proficiency Test Provider accredited by DAkkS and A2LA under the ISO/IEC 17043 standard, as well as a certified reference material provider.

DRRR provides services for many sectors, especially food, consumer goods, packaging, automotive, textile and construction.

USB Certification is the Turkey distributor of DRRR.