Method for determining actual delivery volume for dosing pump intended for delivering substance from container for use in vehicle washing system

A method for determining an actual delivery volume for a dosing pump intended for delivering a substance from a container for use in a vehicle washing system, comprising the following method steps:

• a) reading in a container data record for the container from which the substance is to be delivered by means of the dosing pump, wherein the container data record is an electronic data record which is provided for the container, and wherein the container data record contains information about the design, size or a holding volume of the container;
• b) reading in a digital filling level value representing a filling level measured in the container by means of at least one analog level sensor, or
• c) reading in a digital pressure value representing a pressure measured in the container by means of at least one analog pressure sensor and reading in a digital density value for the substance to be delivered by the dosing pump;
• d) determining and outputting the actual delivery volume which has actually been delivered by the dosing pump, by applying a first function to the digital level value read in step b) and the container data record read in step a) or by applying a second function to the pressure value read in step c) and the density value read in step c) and the container data record read in step a).