A dosing system for use in conjunction with a water-conducting domestic appliance, such as a washing machine, dishwasher, clothes drier or the like, comprising • at least one reservoir (3a, 3b, 3c) for storing a plurality of dosed portions of at least one flowable preparation (4a, 4b, 4c), • at least one dosing device (5a, 5b, 5c), ∘ which can be coupled to a reservoir (3a, 3b, 3c) and ∘ which is positioned outside the treatment chamber of the water-conducting domestic appliance and ∘ which is not connected to a water-conducting line of the water-conducting domestic appliance, at least one pump or vibratory atomizer for conveying or releasing preparation from the reservoir or dosing device, characterized in that, the dosing system further comprises • at least one sensor that detects at least the presence of water in the water-conducting domestic appliance, which sensor is arranged at the distal end of a fluid line (7, 7a, 7b, 7c), which end projects into the treatment chamber. • at least one control unit that interacts with the sensor and the pump or vibratory atomizer in such a way that, when a defined sensor signal representing the presence of water and/or the operation of the water-conducting domestic appliance is present, at least one preparation is conveyed from the reservoir or dosing device by means of the pump or vibratory atomizer, • the fluid line (7, 7a, 7b, 7c), the reservoir (3a, 3b, 3c) or the dosing device (5a, 5b, 5c) being connected to the treatment chamber of the water-conducting domestic appliance, such that a preparation (4a, 4b, 4c) can be fed from the dosing device (5a, 5b, 5c) positioned outside the treatment chamber of the water-conducting domestic appliance into the treatment chamber of the water-conducting domestic appliance by means of an opening (8, 8a, 8b, 8c, 9, 10, 10a, 10b, 10c) that connects the water-conducting domestic appliance to the treatment chamber. • at least one reservoir (3a, 3b, 3c) for storing a plurality of dosed portions of at least one flowable preparation (4a, 4b, 4c), • at least one dosing device (5a, 5b, 5c), ∘ which can be coupled to a reservoir (3a, 3b, 3c) and ∘ which is positioned outside the treatment chamber of the water-conducting domestic appliance and ∘ which is not connected to a water-conducting line of the water-conducting domestic appliance, ∘ which can be coupled to a reservoir (3a, 3b, 3c) and ∘ which is positioned outside the treatment chamber of the water-conducting domestic appliance and ∘ which is not connected to a water-conducting line of the water-conducting domestic appliance, • at least one sensor that detects at least the presence of water in the water-conducting domestic appliance, which sensor is arranged at the distal end of a fluid line (7, 7a, 7b, 7c), which end projects into the treatment chamber. • at least one control unit that interacts with the sensor and the pump or vibratory atomizer in such a way that, when a defined sensor signal representing the presence of water and/or the operation of the water-conducting domestic appliance is present, at least one preparation is conveyed from the reservoir or dosing device by means of the pump or vibratory atomizer, • the fluid line (7, 7a, 7b, 7c), the reservoir (3a, 3b, 3c) or the dosing device (5a, 5b, 5c) being connected to the treatment chamber of the water-conducting domestic appliance, such that a preparation (4a, 4b, 4c) can be fed from the dosing device (5a, 5b, 5c) positioned outside the treatment chamber of the water-conducting domestic appliance into the treatment chamber of the water-conducting domestic appliance by means of an opening (8, 8a, 8b, 8c, 9, 10, 10a, 10b, 10c) that connects the water-conducting domestic appliance to the treatment chamber.