Abstract: A staining device for staining samples has a heating device including a first heating element and a second heating element. A switch arrangement allows the two heating elements to be connected in parallel or in series. A power connection supplies power to the heating elements. A sensor is designed and located to detect a current supplied to the heating elements. A switching unit is coupled to the sensor and determines a voltage causing the current. Depending on the voltage, the switching unit connects the heating elements in parallel or in series.

Abstract: The invention relates to a device (10) for treating specimens, comprising a plurality of reagent containers (12) which are arranged in predetermined positions. Further, the device (10) comprises a transport mechanism (22a, 22b) for transporting at least one transport container (16a, 16b) which accommodates at least one carrier (20). On the carrier at least one specimen is placed. Further, the device (10) has a sensor (34) for determining the fill level (44) of the reagent containers (12) with reagents (42), the sensor (34) being arranged on the transport mechanism (22a, 22b). Further, the invention relates to a method for determining the fill level (44) of reagent containers (12) with reagents (42).