A special Monte Carlo code in which the geometry of the measuring equipment, could be specified, was written to calculate the 4,43 MeVγcounting rate for backseatter geometries and for penetration geometries. The influence of mass per und area, of density, of content of hydrogen, oxygen and iron at coal and of various conveyors for 4,43 MeVγcounting rate teas calculated for application in industry of brown coal. For industrial measuring equipment it is demonstrated that the standard deviation of the value of carbon content is nearly 3%.