FLOOR CLEANING MACHINE AND METHOD FOR USING SAID FLOOR CLEANING MACHINE

The invention relates to a floor cleaning machine which comprises a first tank device (58) for receiving fresh water; a second tank device (62) for receiving a cleaning agent; a mixing device (66) for mixing fresh water from the first tank device (62) with cleaning agent from the second tank device (62); a controller (82) which is designed to control the mixing device (66); a cleaning tool device (22) with at least one cleaning tool (24), which can act mechanically on a floor (26) to be cleaned; and a liquid supplying device (54) which can discharge liquid onto the floor (26) to be cleaned. An impedance sensor device (86) is provided, which comprises at least one impedance sensor (88) that is arranged such that at least one of the following measurements can be carried out: an impedance measurement and/or cyclic voltammetry measurement of the freshwater before the freshwater is supplied to the mixing device (66); an impedance measurement and/or cyclic voltammetry measurement of the cleaning agent before the cleaning agent is supplied to the mixing device (66); an impedance measurement and/or cyclic voltammetry measurement of the liquid, provided by the liquid supplying device (54) for discharge onto the floor (26) to be cleaned; and an impedance measurement and/or cyclic voltammetry measurement of a dirt-loaded liquid originating from the floor (26) to be cleaned, and the impedance sensor device (86) is coupled to the controller (82) for signaling purposes.