The interpretation of signals obtained from a magnetic tracer particle passing through a detector coil surrounding the draft tube in a fluidized bed is addressed. Due to the erratic motion of the particle as it passes through the coil, the signal obtained contains many peaks of differing magnitude and frequency. Using a phenomenological picture of the process and probability theory, a new technique to deconvolve signals of this type is presented. This new data analysis tool allows the discrimination between signals caused by the circulation of the tracer particle in the bed and by those caused by the unsteady motion of the particle in the detector coil. A simple cross-plot is presented to illustrate the technique.