Method and device for measuring the length and diameter of filter rods.

Method for measuring at least one particular geometric physical property (L, d1, d2) of articles (6) shaped bar carried by a duct (5) conveying the tobacco industry, especially bars (6) filter, wherein as physical properties (L, d1, d2) the length (L) and diameter (d1, d2) of the articles (6) by a device (10) is measured optical measurement.