The present invention relates to a
breast pump built to accumulate milk (M) expressed from a breast of a lactating mother in a container, the
breast pump including:a housing,a sensor means including an emitter for an emission of electromagnetic
waves and a
receiver for a reception of the electromagnetic
waves, designed to provide a sensor
signal for a detection of milk (M),a controller for controlling a suction source and preferably adapted to receive the sensor
signal, andthe container adapted to contain a predetermined amount of milk (M) and including at least one transparent section which is at least partially transparent to the electromagnetic
waves and arranged to be in contact with milk (M),wherein one or more of the sensor means is arranged to face in a direction towards at least one of the transparent section at least at a
first fill level (L1) above a lowermost level (L0) of the container in order to provide the sensor
signal as a function of milk (M) being present in front of the sensor means in the direction, andwherein the emitter and the
receiver are arranged in order to have the emitted electromagnetic waves be reflected by milk at the transparent section and detected by the
receiver.