Abstract: A urine flow measuring apparatus that includes a container for receiving urine, measuring means for measuring the weight and/or volume of urine received by the container, and memory means for recording the weight and/or volume measured by the measuring means. Through a controller the measuring means: continually measures the weight and/or volume of the container at regular sampling intervals; and at each sampling interval, identifies if a positive change in the weight and/or volume of the container has occurred and then compares results within a data set, the data set including a result from the current sampling interval and results from all the sampling intervals during a given period. If a number of sampling intervals indicating a positive change in the weight and/or volume is above a certain threshold, the memory means is instructed to begin recording data, else the memory means is instructed to cease recording data.