Abstract: A method and an apparatus for the automatic determination of the dry pulp content, the infiltration capacity and the wire retention of a pulp suspension. In the method the automatically or manually taken pulp suspension sample is brought to the sample container (2) of the determination equipment (1) located in the immediate neighborhood of the production or the operation process. According to the invention the quantity of the sample in the sample container is measured by weighing, the sample is in case of need attenuated into the processing consistency range, a part of the sample is led to the filter (4), is filtrated in the filter with and/or without a filtering paper, the sample cake obtained is transferred to the desiccator (8) and dried with the desiccator, the dried sample cake is weighed and the test results are written out with the output equipment (11).