Various embodiments of an apparatus for measuring binding kinetics of an interaction of an analyte material present in a fluid sample are disclosed. The apparatus includes a sensing resonator having at least one binding site for the analyte material; actuation circuitry adapted to drive the sensing resonator into an oscillating motion; measurement circuitry coupled to the sensing resonator and adapted to measure an output signal of the sensing resonator representing resonance characteristics of the oscillating motion of the sensing resonator; and a controller coupled to the actuation and measurement circuitry, wherein the controller is adapted to detect an individual binding event between the at least one binding site and a molecule of the analyte material.