The invention relates, inter alia, to a system (10) for metering media (16, 16a, 16b, 16c), comprising a metering device (12) with a pump (15, 50) for conveying a predetermined amount of medium (16, 16a, 16b, 16c) from a container (13, 13a, 13b, 13c) to a target device (14, 14a, 14b, 14c), and a suction lance (11, 11a, 11b, 11c) for removing the medium from the container, whereby the suction lance has measuring electronics (18) with which information about a fill level (17, 17a, 17b, 17c) of the medium in the container can be determined, a display device (19, 19a, 19b, 19c) connected to the measuring electronics being provided with which different colors (20, 21, 22) can be output, the display device displaying a first color (20) as a result of receiving first information about a first fill level (17a) and as a result of receiving second information about a second , from the first filling level different filling level (17b) ei displays a second color different from the first color (21).
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