A drain control device for a filter system for filtering a media flow of a first medium and a second medium, wherein the second medium separated from the media flow collects in a collecting chamber of the filter system, has sensor arrangement with at least a first sensor unit and a second sensor unit. The first and second sensor units detect a filling level of the second medium in the collecting chamber. The first and second sensor units operate based on a different action mechanism, respectively. One or more shut-off valves are arranged at a media outlet of the collecting chamber. The first and second sensor units are operatively connected with the one or more shut-off valves to automatically drain the second medium from the collecting chamber through the media outlet when a drain criterion is reached. A filter system with such a drain control device is provided.