DESCRIZIONE
The invention relates to a device, particularly an extraction device or evaporation device, comprising at least one receiver for a container (4), at least one heating element for said container (4), at least one light source (1), at least one sensor (2), and an evaluation unit. The light source (1) and/or the sensor (2) are arranged outside of the container (4) such that a light signal (3) generated by the light source (2) and passing through the container can be detected by the sensor (1).