An analyte detection system includes a detector situated close to a well of a substrate. The well includes conjugated paramagnetic beads. The detection system also includes a magnetic field generator that provides an oscillating magnetic field in the well and the detector, an oscillator circuit coupled to the detector, and a circuit coupled to the detector that detect the conjugated paramagnetic beads. A method includes applying a magnetic field to well of a substrate with conjugated paramagnetic beads, alternating the polarity of the magnetic field, detecting a waveform associated with the alternating magnetic field, and associating the waveform with the quantity of conjugated paramagnetic beads. An analyte detection kit includes a substrate with an attached antibody that is reactive to the analyte, a conjugated paramagnetic particle, and a conjugated paramagnetic particle detector.