LNE is developing a MEtrological ChARacterization of Nanomaterials (CARMEN) platform to offer a complete supply of main parameter measurements characterizing a nano-object (size, shape, polydispersity, agglomeration/aggregation state, surface charges, specific charges. . . ). Other physical properties such local electrical measurements will be able to be performed on nanodevices. This platform aims to establish tracability routes, define measurement protocols and sampling methods. The uncertainties associated with measurements will offer to users an optimum confidence level. Instrumentation is put in a clean room within a controlled environment (temperature, humidity, vibration. . . ). Thanks to this platform, LNE will be able to help manufacturers and laboratories to meet to the governmental requests concerning the mandatory declaration of nanosubstances as described in the French decree number 2012-232, dated the 17th on February, 2012 (JORF number 0043 on 19th February 2012). Furthermore, this platform will make it possible to support the teams involved in the toxicological investigations linked to nanomaterials.