1. A wetness event detection system for processing sensor signals to detect wetness events in sensor data obtained from one or more wetness sensors in a pad worn by a subject, the system including: (a) an input module configured to receive and optionally pre-process sensor signals from the one or more wetness sensors; (b) a storage module configured to store reference wetness data; (c) processing means configured to process sensor data from the input module to identify wetness events in the sensor data; (d) a memory module storing instructions that are executable to cause the processor to perform a method of analysing sensor data; (e) a user interface configured to receive inputs from a user; and (f) a display means communicatively coupled with the processing means and configured to display wetness event information derived from the processing means, wherein the processing means processes the sensor data in segments identified using a moving window including one or more boundaries to output a sequence of segment types by extracting one or more properties of an incoming data segment including properties derived from one or more intersections of the incoming data with the one or more boundaries and forming an Unknown Property Vector for each segment of data in the incoming data to identify wetness events in the incoming data, wherein the sequence of segment types is determined, for each segment, by reference to a set of Reference Property Vectors that are relevant to the Unknown Property Vector.