
Lovibond- Tintometer groupWater testing – Germany

Lovibond- Tintometer group Colour measurement – UK

Fungilab – Barcelona

SMI-LabHut – UK

Optical Activity Ltd – UK

Index Instruments Limited – UK

Hirscmann – Germany

Tecnología Difusión Ibérica (TDI) – Spain

Kern- Sohn – Germany

Τfa-dostmann – Germany

Microtrac – U.S.A.

Kyoto- Kem – Japan

Kinematica – Switzerland

Consort – Belgium
