Internal leak detector

A method of performing leak detection using a leak detector device (100) for detecting an internal leak in a fluid path, wherein the leak detector device (100) comprises:

• a housing (110) with a flow passage (120) extending through the housing (110);
• one or more pairs of temperature sensors (130, 140) for detecting a temperature difference between an outside of the housing (110) and the flow passage (120), one temperature sensor of each pair being arranged towards an outer surface of the housing (110) and another temperature sensor of the pair being arranged towards an inner surface of the housing (110) that faces the flow passage (120) such that the temperature sensors of each pair are arranged opposite to each other, with a wall portion of the housing interposed between them;
• and
• an array of electrically conductive wires (150, 160) that extend across the flow passage (120), wherein the array of electrically conductive wires (150, 160) comprises one or more positive polarity wires and one or more negative polarity wires;
• and
• wherein the method comprises:
• detecting, when a circuit is completed by a conductive fluid droplet, a current flowing between one or more of the positive polarity wires and one or more of the negative polarity wires of the array of electrically conductive wires (150, 160);
• detecting one or more temperature differences from the pairs of temperature sensors (130, 140);
• and
• determining whether an internal leak is present in the fluid path based on the detected current and the detected one or more temperature differences.