A proposed force sensor contains a one-dimensional periodic superlattice and piezoceramic wave generator–receiver pair. For force sensing, the strain induced by an applied force in the phononic structure causes stop band frequency variations because the sound velocity varies with the induced strain (stress). When the input wave frequency coincides with the margins of the stop band, it results in noticeable variations in the wave transmission rate with the applied strain. As a result, sensitivity, represented by the transmission rate variation, can be adjusted by introducing distinct acoustic wave frequencies within a phononic structure. A high sensitivity level is suitable for the detection of light forces. Conversely, when dealing with large force measurements, the sensitivity should be reduced to prevent saturation. This study presents theoretical models for analyzing the variation of the transmission rate with frequency and the variation of the stop band with different acoustic parameters. To enhance the signal reaching the receiver, a piezoceramic disk whose axial resonance frequency corresponds to the frequency of the stop band margin is designed. The results indicated that the sensitivity of a prototype of the designed force sensor varied from 15 to 45 mV/N under a compressive force of 50 N.