System for detecting dry running of a pump, comprising: - an inlet device for feeding an electrically conductive liquid to an intake device of the pump for taking in the electrically conductive liquid, - an electrical resistance structure, which is arranged in the inlet device, - wherein the electrical resistance structure has a variable resistance value, dependent on wetting with the electrically conductive liquid. - wherein the resistance structure is designed in such a way that the resistance structure has a first resistance value when it is wetted with the electrically conductive liquid and a second resistance value when it is not wetted with the electrically conductive liquid, - wherein the first resistance value is smaller than the second resistance value. - wherein the resistance structure has a first and a second terminal (A20a, A20b) for tapping off a voltage, - an evaluation circuit for determining the resistance value of the resistance structure, - wherein the evaluation circuit is designed to detect dry running of the pump when the evaluation circuit determines the second resistance value between the first and the second terminal (A20a, A20b) of the resistance structure, characterized in that - the resistance structure has between the first and the second terminal (A20a, A20b) interconnected conductor track sections, wherein the conductor track sections have at least one conductor track section (21, 23, 25, 27) made of a first material and at least one further conductor track section (22, 24, 26) made of a second material, wherein the first material has a higher electrical conductivity than the second material, and - the evaluation circuit is designed to determine a line break within the resistance structure if the evaluation circuit does not detect a current when a voltage is applied between the first and the second terminal (A20a, A20b) of the resistance structure. - an inlet device for feeding an electrically conductive liquid to an intake device of the pump for taking in the electrically conductive liquid, - an electrical resistance structure, which is arranged in the inlet device, - wherein the electrical resistance structure has a variable resistance value, dependent on wetting with the electrically conductive liquid. - wherein the resistance structure is designed in such a way that the resistance structure has a first resistance value when it is wetted with the electrically conductive liquid and a second resistance value when it is not wetted with the electrically conductive liquid, - wherein the first resistance value is smaller than the second resistance value. - wherein the resistance structure has a first and a second terminal (A20a, A20b) for tapping off a voltage, - an evaluation circuit for determining the resistance value of the resistance structure, - wherein the evaluation circuit is designed to detect dry running of the pump when the evaluation circuit determines the second resistance value between the first and the second terminal (A20a, A20b) of the resistance structure, characterized in that - the resistance structure has between the first and the second terminal (A20a, A20b) interconnected conductor track sections, wherein the conductor track sections have at least one conductor track section (21, 23, 25, 27) made of a first material and at least one further conductor track section (22, 24, 26) made of a second material, wherein the first material has a higher electrical conductivity than the second material, and - the evaluation circuit is designed to determine a line break within the resistance structure if the evaluation circuit does not detect a current when a voltage is applied between the first and the second terminal (A20a, A20b) of the resistance structure.