A device for mixture of substances, whether in the form of a fixed or removable cap or in the form of emersion within a container, utilizing individual internal substance compartments, controlled by an external actuation mechanism. A capacitive measurement circuit, which produces a low frequency measurement signal on the measuring probe, a time-domain reflectometer measurement circuit, which produces a high frequency, electromagnetic signal sent out as a sent signal and a controlevaluation unit, which controls both measurement circuits are included. Accordingly, the number of channels over which data is communicated may be altered based on determined thresholds for the utilization andor availability of resources.