Abstract: A method and a device function for monitoring and/or controlling and regulating a granulation, agglomeration, instantization, coating and drying process in a fluidized layer or a moving bulk by determining the product moisture. At least during one process segment the total product moisture is measured substantially continuously over a period of seconds, in a contact-free manner using electromagnetic radiation in the high frequency or microwave range, by evaluation of the attenuation of the radiation as a measure of this total product moisture. Taking into account the product temperature, the measurement result is used to hold the total product moisture in a pre-determined range via a control circuit by changing the spray rate and/or the gas temperature and/or the volume flow.