System for detecting dry running of a pump

A system which detects dry running of a pump, the system comprising:

• an inlet device which feeds an electrically conductive liquid to an intake device of the pump for taking in the electrically conductive liquid;
• and
• an electrical resistance structure arranged entirely within the inlet device;
• wherein the electrical resistance structure has a variable resistance value which is dependent on wetting with the electrically conductive liquid;
• wherein the electrical resistance structure has a first and a second terminal configured to tap off a voltage;
• and
• wherein the electrical resistance structure arranged entirely within the inlet device has, arranged in series between the first and the second terminal, at least one conductor track section made of a first material and at least one further conductor track section made of a second material.