Dishwasher

A dishwasher comprises: - a washing compartment (2) designed to accommodate the articles to be washed; - spraying means (3) for spraying a washing liquid in the washing compartment (2); - a motor-driven pump (4); - ducting means (5) for connecting the washing compartment (2) and the spraying means (3), said pump (4) being located along the ducting means (5) in order to pump the washing liquid from the washing compartment (2) to the spraying means (3); - means (6) for measuring at least one physical property of the washing liquid, comprising a sensor (60) located in the washing compartment (2) or along the ducting means (5) and designed to detect the dirtiness of the washing liquid at the sensor (60). At least during each reading performed by the sensor (60) for measuring the dirtiness of the washing liquid, the dishwasher (1) adopting a first operating reference condition in which the flow processed by the pump (4) substantially always adopts the same predetermined value. [ Figure 1 ]