This part of the series DIN 62607 provides a standardized method for categorizing a grade of commercial carbon nanotubes (CNTs) in terms of their electrical properties. It is to enable users to specify a CNT material suitable for their application. This method is intended to assess whether the delivered materials from different production batches of the same production process are comparable regarding the properties of the final product which are related to electrical conductivity. The correlation between the measured parameters by the proposed method and a relevant product performance parameter shall be established for every application. This specification includes recommendations for sample preparation, outlines of the experimental procedures to measure sheet resistance of CNTs in thin films, methods of interpretation of results and discussion of data analysis, case studies and references. The responsible body is DKE/K 141 "Nanotechnologie" ("Nanotechnology") of the DKE (German Commission for Electrical, Electronic and Information Technologies) at DIN and VDE.