Device for dispensing liquid media from individual chambers of a tanker

The device has a collector (36) connected with a dispensing tube (46). A supply pump (40) and a volume meter (42) are arranged in a dispenser line (38), and a connection to a dispensing spray gun (48) is provided in a line section (24) between bottom valves (18-22) and collector valves (30-34). The connection is connected with the section by a return valve (64). A sensor e.g. low-level indicator sensor (70), is attached to the connection for recirculation before or below the return valve and provides a monitoring signal to a control device (50) when a fluid medium flows through the connection.