A system for detecting and indicating variations in volume of chemicals in a container, the system comprising: a retention basin configured to retain the container, the retention basin comprising: a pressure cell configured to measure a weight of the container, the container being placed on the pressure cell; a basin input interface; and a basin controller; a washing device configured to apply the chemicals in the container to contents disposed in the washing device, the washing device comprising a washing device communication interface configured to wirelessly communicate with the retention basin, wherein the retention basin further comprises a basin communication interface configured to wirelessly communicate with the washing device via the washing device communication interface; and pick-up tubes configured to transfer the chemicals in the container to the washing device; characterized in that the basin input interface is configured to allow to a user specification of properties of the chemicals in the container; the basin controller is configured to calculate the volume of the chemicals in the container based on the measured weight of the container and the specified properties of the chemicals in the container, the basin controller comprising a basin display configured to display the calculated volume of the chemicals in the container; and the pick-up tubes comprise one or more level sensors positioned therein, the level sensors being configured to detect an amount of the chemicals remaining in the container and communicate the detected amount to the basin controller. a retention basin configured to retain the container, the retention basin comprising: a pressure cell configured to measure a weight of the container, the container being placed on the pressure cell; a basin input interface; and a basin controller; a pressure cell configured to measure a weight of the container, the container being placed on the pressure cell; a basin input interface; and a basin controller; a washing device configured to apply the chemicals in the container to contents disposed in the washing device, the washing device comprising a washing device communication interface configured to wirelessly communicate with the retention basin, wherein the retention basin further comprises a basin communication interface configured to wirelessly communicate with the washing device via the washing device communication interface; and pick-up tubes configured to transfer the chemicals in the container to the washing device; characterized in that the basin input interface is configured to allow to a user specification of properties of the pick-up tubes configured to transfer the chemicals in the container to the washing device; characterized in that the basin input interface is configured to allow to a user specification of properties of the chemicals in the container; the basin controller is configured to calculate the volume of the chemicals in the container based on the measured weight of the container and the specified properties of the chemicals in the container, the basin controller comprising a basin display configured to display the calculated volume of the chemicals in the container; and the pick-up tubes comprise one or more level sensors positioned therein, the level sensors being configured to detect an amount of the chemicals remaining in the container and communicate the detected amount to the basin controller. the basin controller is configured to calculate the volume of the chemicals in the container based on the measured weight of the container and the specified properties of the chemicals in the container, the basin controller comprising a basin display configured to display the calculated volume of the chemicals in the container; and the pick-up tubes comprise one or more level sensors positioned therein, the level sensors being configured to detect an amount of the chemicals remaining in the container and communicate the detected amount to the basin controller.