US Patent 8144021 Device and apparatus for detecting moisture

A device for detecting the presence of bodily fluid, the device including a detector (1) means having two spaced apart electrodes (2, 3), each electrode is connected to a signal generating means via a lead (6, 7). The electrodes are encased in a flexible non-conductive material with each including at least one protruding conductive element (4). The protruding elements are separated by the same distance as the spacing between the two electrodes. The device also includes a signal processing means that detects a change of state across the electrodes produced by the introduction of a fluid and an alarm actuated by the change of state.